[{"id":1,"published_at":"2014-02-05T11:30:00Z","entries":[],"additional_notes":"- Slightly increased seismicity under Vatnajökull, between Grímsvötn and Bárðabunga. - Conductivity in the river Múlakvísl (SE of Mýrdalsjökull, Katla) decreasing to normal background level after being higher than usual throughout the last weeks."},{"id":2,"published_at":"2014-02-12T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See Additional Notes"}],"additional_notes":"Katla: Conductivity measurements from the Markarfljót river increased late on Sunday, 9th of February, and peaked late on Monday, 10th of February. We interpret this is a sign of increased geothermal runoff from north-western Mýrdalsjökull glacier (the icecap covering Katla volcano). No significant increase in river discharge has been measured. No significant increase in seismicity has been measured. The situation is being followed closely and we will report any significant changes."},{"id":3,"published_at":"2014-02-19T11:15:00Z","entries":[],"additional_notes":""},{"id":4,"published_at":"2014-02-26T11:23:00Z","entries":[],"additional_notes":"Normal background activity."},{"id":5,"published_at":"2014-05-07T11:15:00Z","entries":[],"additional_notes":"On Friday 2 May, an earthquake swarm began at Herðubreiðartögl, about 20 km north-east of Askja (see: http://hraun.vedur.is/ja/viku/2014/vika_18). Seismic activity peaked on Sunday 4 May with a magnitude 3.9 earthquake. Since the swarm began, over 1000 earthquakes have occurred at Herðubreiðartögl, mostly at depths of 4 – 6 km. Although the swarm continues, the seismicity rate has decreased in recent days. The cause of the seismicity is presently unclear. As the situation is today, there are no measurable signs that an eruption is imminent."},{"id":6,"published_at":"2014-05-14T11:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Intense earthquake swarm at Herðurbreiðartögl continues"},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 earthquake under Langjökull"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm about 35 km offshore on Reykjanesridge continues"}],"additional_notes":""},{"id":7,"published_at":"2014-05-21T11:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm at Herðurbreiðartögl continues"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm started on 15 May."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm about 35 km offshore on Reykjanes Ridge is decreasing"}],"additional_notes":"Last week we measured a high number of earthquakes in Iceland. There are a few swarms ongoing at the same time: Herðubreiðatögl (ASKJA), offshore Reykjanes and Bárðarbunga. Note: Magmatic intrusive activity is very common in Iceland but very few reach the surface The seismic activity at Askja still continues but with less intensity. Magma triggered activity at depth > 5km is possible but can not be confirmed at the moment. The area is known for high earthquake activity. The offshore Reykjanes swarm has decreased rapidly since last week. The Bárðarbunga swarm is not exceptional for the region. The number of events in the swarm is similar to a swarm recorded early last year, however the M3,7 event on May 16 is the strongest since 2010. The swarm preceding the 1996 eruption was much more intense both in rate and energy release. We are still closely monitoring the swarms. Any sudden increase in activity will be reported and result in color change in the map."},{"id":8,"published_at":"2014-05-28T11:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm at Herðurbreiðartögl continues"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm started on 15 May. Decaying."}],"additional_notes":"There are two swarms ongoing now: Herðubreiðatögl (ASKJA) and Bárðarbunga. The seismic activity at Askja still continues but with less intensity. The seismicity has migrated slightly westwards (~1km) in the last two days. (Magma triggered activity at depth > 5km is possible but can not be confirmed at the moment. We are still waiting for InSAR deformation analysis.) The area is known for high earthquake activity. The Bárðarbunga swarm seems to be decreasing. We are still closely monitoring the swarms. Any sudden increase in activity will be reported and result in color change in the map."},{"id":9,"published_at":"2014-06-11T10:57:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Declining activity at Herðurbreiðartögl"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Some activity still ongoing around Bárðarbunga"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Few small events located beneath Katla volcano have been detected likely at deep level"}],"additional_notes":"Katla:\nFew small events located beneath Katla volcano have been detected likely at deep level. These events could be not very well constrained due to limitation of network detection threshold. Similar deep events have been observed in the last couple of years."},{"id":10,"published_at":"2014-06-18T11:30:00Z","entries":[],"additional_notes":"Background levels of seismicity were observed beneath Mýrdalsjökull and the north-western part of Vatnajökull. The earthquake swarm at Herðubreiðartögl, north of Vatnajökull, has subsided and only occasional micro-earthquakes are occurring in the region. An eruption exercise is in progress today, 18 June. The exercise is in connection with VOLCICE and the European project FutureVolc. The exercise simulates an eruption of Hekla volcano."},{"id":11,"published_at":"2014-07-09T11:30:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor glacial floods."}],"additional_notes":"Seismic activity within the Katla caldera has been gradually increasing since the beginning of this month. The largest earthquake was yesterday morning and had a magnitude ~3. All the earthquakes have been shallow (<10 km depth) and are probably related to the geothermal areas within the caldera. A minor outburst flood (jökulhlaup) is occurring in the Múlakvísl river, south-east of Mýrdalsjökull. The flood began around 2 July, resulting in higher-than-normal discharge and increased electrical conductivity. A high level of electrical conductivity is a sign that geothermal water is draining from beneath Mýrdalsjökull, most likely from one of the known surface depression (ice cauldrons) on the ice cap. Conductivity readings have also increased at Jökulsá á Sólheimasandi - the river draining from Sólheimajökull, in south of Mýrdalsjökull. It is likely that a small jökulhlaup is also occurring at Sólheimajökull from a separate ice cauldron. Although the summertime drainage of ice cauldrons on Mýrdalsjökull is not unusual, it is possible that the ongoing floods could become larger."},{"id":12,"published_at":"2014-07-16T11:30:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Shallow seismic activity"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Slightly increased seismicity"}],"additional_notes":"Katla:\nShallow (<10 km) seismic activity in Katla has increased since beginning of the month. During the last week, several short pulses of earthquakes have been measured within the caldera close to ice cauldrons above hydrothermal systems. The strongest event occurred on Tuesday 15. July at 11:01 in the central east-western part of the caldera, it had a magnitude of 3.1 and was followed by about 30 aftershocks. We interpret the recent shallow events in Katla as being linked to increased hydrothermal activity. Following small glacial floods (jökulhlaups) in recent days, the pressure on the hydrothermal systems has decreased which most likely triggered the events seen now. There are neither signs of shallow magmatic activity nor any evidence that these shallow events could be linked to the deep magmatic events that were seen some weeks ago (only three deep (20-25 km) events were detected under the eastern caldera rim, one on Wednesday evening 09.07.2014 and two on Monday evening 14.07.2014). Water levels in rivers around Mýrdalsjökull have decreased since end of last week, same as conductivity of the water. H2S, SO2 and CO2 concentrations at the outlet of Sólheimajökull (SW of Mýrdalsjökull) are around or below detection limit since Sunday 13. July.\nTorfajökull:\nIncreased seismic activity, most likely due to hydrothermal activity. Events are shallow and similar clusters of events have frequently occurred in the past."},{"id":13,"published_at":"2014-07-23T11:55:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Huge rockslide"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Activity decreasing"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Back to normal"}],"additional_notes":"Askja:\nA huge rock slide has occurred on the south-eastern flank of the caldera into lake Öskjuvatn on Monday 21 July at 23:24 UTC. The slide has caused a tsunami of several meters height in the lake. A steam or a dust plume was seen rising above the caldera. It is unclear if this plume was caused by hydrothermal activity or just dust due to the rock slide. No signs of volcanic activity.\nKatla:\nActivity in Katla has been significantly decreasing. Few shallow earthquakes are measured inside the caldera per day. South west Vatnajökull: Icequake activity in SW Vatnajökull. It is unclear whether this activity is caused by leaking of any hydrothermal cauldron or simply due to precipitation and melting conditions. No sign of a larger glacial outburst flood."},{"id":14,"published_at":"2014-07-30T11:55:00Z","entries":[],"additional_notes":"Nothing to report"},{"id":15,"published_at":"2014-08-06T13:00:00Z","entries":[{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Small swarm July 31st."}],"additional_notes":"Sprengisandur (64.9, -18): Swarm is ongoing in the area since July 30. The earthquakes have tectonic origin and there is no concern for pending eruption in the area at the moment. Torfajokull: Up to 20 earthquakes have been detected in the NW part of the area on July 31. There is no concern for pending eruption in the area at the moment."},{"id":16,"published_at":"2014-08-13T11:35:00Z","entries":[{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":null,"status_text":"Small seismic swarm in the evening on 10. August until next morning."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Back to normal seismicity"}],"additional_notes":"Normal background seismic activity."},{"id":17,"published_at":"2014-08-27T10:35:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"There was a magnitude 4,5 earthquake in Askja at 01:52 27/8 with a poorly-constrained depth of 4 km. GPS modelling results suggest that the dyke intrusion from Bárðarbunga is causing stress changes over a large area, including the region to the north of the dyke which could induce increased seismicity at Askja volcano."},{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Status as of 27 August, 10:30 AM: The earthquake swarm that began on 16 August at 03:00 is still ongoing. Intense earthquake activity is concentrated in the northernmost tip of the dike extending from Bárðarbunga caldera past the edge of Dyngjajökull. The dike has periods of propagation and periods of not moving forward. Earthquakes greater than 3 (and some greater than 5) continue in the Bárðarbunga caldera. These are interpreted as a relaxation process of the caldera due to magma pressure changes. The results of continuous GPS measurements continue to track the magmatic intrusion. There are no indications that the intensity of the activity declining."},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":null,"status_text":"Back to normal seismicity"}],"additional_notes":"As of Thursday, 21 of August, the intrusion beneath Dyngjujökull was ~28 km long. On this day, the intrusion was interpreted to be widening at its northeastern end, and propagating very little. Earthquakes in the Bárðarbunga caldera (some greater than 3) at 2-5 km depth are interpreted as being due to the outward flow of magma from beneath the caldera. On Friday, 22 of August, most of the seismic activity was located by the intrusion at 8-12 km depth. The dike propagated less than 1 km since yesterday. At 23:50:22 on 21 August there was a 4.7 earthquake at Bárðarbunga caldera. The caldera earthquakes have been at 2-6 km depth. On Saturday, 23 of August, the dike propagated ~9 km. The rate of earthquakes was so high it was difficult to discern individual events. High frequency seismic tremor was observed and interpreted to be caused by propagation of the dike. Low frequency seismic tremor was observed from 11:20-13:20. This tremor is consistent with lava/ice interaction, and is similar to the tremor observed during the Fimmvörðuháls eruption and the lava flowing phase of the Eyjafjallajökull eruption. Earthquakes up to magnitude 4.5 were detected in the Bárðarbunga caldera. GPS data shows that magma flow is continuing. No surface changes were observed by an overflight of TF-SIF. On Sunday, 24 of August, the strongest earthquakes measured since the onset of the seismic crisis at Bárðarbunga and the strongest since 1996 (the Gjálp eruption) were detected. Three magnitude ~5 (largest 5.3) were detected on the rim of the caldera. Seismic activity was most active near the northernmost portion of the dike at 8-13 km depth. The largest earthquake in the dike was 3.5 at 04:39. Most of the seismic activity is now under the edge of the glacier. The dike propagated ~6 km since yesterday. On Monday, 25 of August, seismicity was most active near the northernmost portion of the dike which now extends beyond the Dyngjujökull glacier. The dike is now ~48 km long and it propagated ~3 km since yesterday. Several earthquakes along the dike were greater than magnitude 3, three of them ~3.5. Most were around 10 km depth. Following the magnitude ~5 earthquakes in the caldera last night, earthquakes within the caldera have been smaller. Modelling of GPS data by the University of Iceland indicates that it contains about 300 million cubic meters of magma. On Tuesday, 26 of August, the largest earthquake in the current swarm was detected at 1:26 as USGS magnitude 5.7 in the caldera at 6 km depth. Most of the seismic activity was close to the edge of Dyngjujökull at 8-12 km depth. The dike has propagated ~1 km since yesterday and is ~49 km long. Modelling of GPS data by the University of Iceland indicates that about 50 million cubic meters of magma have added to the volume in the last 24 hours. No surface changes were observed by an overflight of TF-SIF. On Wednesday, 27 of August, there was a magnitude 5.3 event in Bárðarbunga at 00:16 and a 5.2 at 02:50. Activity around the tip of the dike started increasing after the first significant even with many magnitude 2-3 earthquakes. Earthquakes are mainly beyond the edge of Dyngjujökull. Modelling of GPS data by the University of Iceland indicates that about 20 million cubic meters of magma have added to the volume in the last 24 hours. Throughout the whole sequence until Wednesday, 27th of August 10:30, the majority of seismic events have been calculated to be at 5-10 km depth. Very strong indications of ongoing magma movement, in connection with dike intrusion within the Bárðarbunga volcanic system, is corroborated by GPS ground deformation measurements. Summary of color code changes On 16 August, due to increased seismicity in Barðarbunga and signals of increased deformation from GPS measurements in the area, the Bárðarbunga aviation color code was changed from green to yellow. On 18 August, the Bárðarbunga aviation color code was changed from yellow to orange after a reevaluation of the events of the previous days. Geophysicists agreed that evidence of magma movement shallower than 10 km implies an increased potential of a volcanic eruption. On 23 August, the Bárðarbunga aviation color code was changed from orange to red after low-frequency seismic tremor (at 1 and 1.5 Hz) was observed. This tremor is consistent with lava/ice interaction, and is similar to the tremor observed during the Fimmvörðuháls eruption and the lava flowing phase of the Eyjafjallajökull eruption. On 24 August, the Bárðarbunga aviation color code was changed from red to orange after there were no surface observations of a subglacial eruption. There has not been another explanation suggested for the intense low-frequency seismic signal observed on 23 August. Overall assessment Currently, three scenarios are considered most likely: The migration of magma could stop, attended by a gradual reduction in seismic activity. The dike could reach the surface of the crust, starting an eruption. In this scenario, it is most likely that the eruption would be near the northern tip of the dike. This would most likely produce an effusive lava eruption with limited explosive, ash-producing activity. An alternate scenario would be the dike reaching the surface where a significant part, or all, of the fissure is beneath the glacier. This would most likely produce a flood in Jökulsá á Fjöllum and perhaps explosive, ash-producing activity. Other scenarios cannot be excluded. For example, an eruption inside the Bárdarbunga caldera is possible but currently considered to be less likely. The situation is monitored closely and the alert level remains at orange. IMO is monitoring the area around the clock very closely and will update in case of any changes."},{"id":18,"published_at":"2014-09-03T13:15:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The level of seismic activity in Askja is still over background levels. The colour code remains at yellow."},{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Status as of 3 September, 12:00 noon: The earthquake swarm that began on 16 August at 03:00 is still ongoing. Right after midnight 29 August, a small effusive fissure eruption occurred on an old volcanic fissure, about 5 km north of the Dyngjujökull ice margin. The eruption lasted about 4 hours. Early morning on the 31st August, a second fissure eruption occurred at the same location, also effusive. The eruptive fissure is longer and is still ongoing. Earthquake activity decreased slightly after the onset of the second eruption. Also, the dyke intrusion has not migrated further north since the eruption began. Earthquakes greater than magnitude 5 continue to occur at the rim of the Bárðarbunga caldera."},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"There has been an increase in seismicity in the area since the beginning of the earthquake swarm, interpreted as a response to the changes in the stress field due to the magma intrusion."}],"additional_notes":"Daily summary Right after midnight on 29 August, a small fissure eruption started in Holuhraun (Hola lava) north of Dyngjujökull. It lasted around four hours. Seismic activity decreased as a result of the pressure release. However, a significant amount of earthquakes was still detected in the magma dyke, between the eruption site and south to about 5 km into Dyngjujökull. On 30th of August, there was no sign that the dyke intrusion was migrating further to the north. Earthquakes mainly occurred in an area extending from about 4 km south of the glacier margin of Dyngjujökull to the location of the fissure eruption. Earthquakes of magnitude 4.5, 4.2 and 5.4 were located at the rim of Bárðarbunga caldera. Early morning on 31st of August, another lava eruption started in Holuhraun. The eruptive fissure is longer than in the last eruption, though on the same fissure. No signs of volcanic tremor were observed in the seismic data. Earthquake activity decreases. No ash is detected. A magnitude 4.9 earthquake occurred on the northern rim of the Bárðarbunga caldera. On 1st September, the fissure eruption continued at a stable level. Lava flowed northward from the eruption site. No explosive activity or ash-fall are observed. The main seismicity is located in the northern part of the magma intrusion. The earthquake rate has decreased as a result of the pressure release due to the eruption. Several earthquakes occurred around the Bárðarbunga caldera rim, the strongest of magnitudes 4.2, 4.5, 5.0 and 5.2. On 2nd September, the effusive lava eruption continues at a stable level. The level of seismicity decreases. The strongest earthquakes around the Bárðarbunga caldera rim were of magnitudes 4.7 and 4.3. On 3rd September, the eruption continues. GPS measurements indicate that the volume of the dyke intrusion has increased since the beginning of the eruption, signifying that more magma is entering the dyke than is being erupted. A magnitude 5.5 earthquake occurred at the northern rim of Bárðarbunga caldera early morning. Some tremor pulses have been recorded during the day. Summary of color code changes At 10:00 UTC 29 August, IMO changed the Aviation Colour Code for Bárðarbunga to 'orange', signifying that significant emission of ash into the atmosphere is unlikely. The aviation colour-code for Askja volcano remains 'yellow'. Overall assessment Currently, four scenarios are considered most likely: The migration of magma could stop, resulting in a gradual reduction in seismic activity and no further eruptions. The dyke could reach the surface of the crust causing another eruption, possibly on a new fissure. Lava flow and (or) explosive activity cannot be excluded. The intrusion reaches the surface and another eruption occurs where either the fissure is partly or entirely beneath Dyngjujökull. This would most likely produce a flood in Jökulsá á Fjöllum and perhaps explosive, ash-producing activity. An eruption in Bárðarbunga. The eruption could cause an outburst flood and possibly explosive, ash-producing activity. In the event of a subglacial eruption, it is most likely that flooding would affect Jökulsá á Fjöllum. However, it is not possible to exclude the following flood paths: Skjálfandafljót, Kaldakvísl, Skaftá and Grímsvötn. Other scenarios cannot be excluded. The situation is monitored closely and the alert level remains at orange. IMO is monitoring the area around the clock very closely and will update in case of any changes."},{"id":19,"published_at":"2014-09-10T12:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Askja colour code remains at yellow"},{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"The earthquake swarm that began on 16 August is still ongoing. The 2nd eruptin north of Dyngjujökull that started on 31 August is still ongoing. On 5 September a second fissure opened south of the eruption. This smaller fissure was active until 7 September. The number of detected events has dropped significantly after the eruptions started and there are no indications that the dyke has progressed farther north. Earthquakes greater than magnitude 5 continue to occur at the rim of the Bárðarbunga caldera."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"A small Jökulhlaup 3-10 September"},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"We still observe a few events at Tungnafellsjökull and SE of it, as we have since the beginning of the unrest in Bárðarbunga."}],"additional_notes":"Bárðarbunga - Daily summary: 3 September. GPS-measurements still indicate a slight volume increase in the dyke intrusion. Radar images show a 0.5-1 km wide depression formed both in front of and beneath Dyngjujökull, at least 2 km into the ice margin. Eruption continues, ash production almost negligible. Gas/eruption cloud drifts to the north-east. Seismicity still continues at northern part of dyke and Bárðarbunga. Tremor burst, probably originating in/beneath Dyngjujökull observed during a period of several hours. Likely due to magma-water interaction. 4 September. Eruption continues at a similar intensity. Gas/eruption cloud reaches 6 km altitude. Ash production negligible. Similar pattern in seismicity at dyke and Bárðarbunga. GPS-measurements indicate a slower rate of deformation. 5 September. A second eruption fissure, south of the main fissure, is observed, ~2 km from Dyngjujökull ice-margin. Eruption on main fissure continues. Cauldron observed in Dyngjujökull seems to have grown deeper since last observation. May be linked to tremor pulse observed on 3 September. A slight increase in conductivity also observed in Jökulsá á Fjöllum (draining from Dyngjujökull). GPS-displacements decrease and now within uncertainty limits. 6 September. Two eruptive fissures still active. Seismicity continues at slightly lower rate but same locations (Bárðarbunga, dyke). Depression in Dyngjujökull has deepened and another one has been observed. Up to 15 m subsidence of the ice-surface within the Bárðarbunga caldera observed with radar system of Isavia's aircraft. This corresponds to 0.25 m3 volume change. Most probable explanation is connection to magma feeding towards the east and high seismicity rate. Measurements of SO2 in populated areas in Eastern Iceland have risen temporarily above health limits. 7 September. Two eruptive fissures still active, but intensity has greatly decreased on the southern (smaller) fissure. Eruption cloud rises 3-4 km, directed to N and NE. Seicmicity similar to day before. GPS show insignificant changes, indicating that magma flow into dyke is similar to magma erupting. 8 September. No eruption activity detected on southern fissure. Eruption continues on main fissure. Similar seismic activity, but slightly decreased number of detected events. 9 September. Eruption continues on main fissure. Seismic activity similar, still concentrated at the northern part of the dyke and Bárðarbunga (mainly northern caldera rim). No colour-code changes. Overall assessment Three scenarios are still considered most likely: 1)Subsidence of the Bárðarbunga caldera stops and the eruption on Holuhraun declines gradually. 2)Large-scale subsidence of the caldera occurs, prolonging or strengthening the eruption on Holuhraun. In this situation, it is likely that the eruptive fissure would lengthen southwards under Dyngjujökull, resulting in a jökulhlaup and an ash-producing eruption. It is also possible that eruptive fissures could develop in another location under the glacier. 3) Large-scale subsidence of the caldera occurs, causing an eruption at the edge of the caldera. Such an eruption would melt large quantities of ice, leading to a major jökulhlaup. Other scenarios cannot be excluded. Katla: 3-10 September we have observed increased conductivity in Múlakvísl glacial river (draining from the Katla caldera), indicating a small Jökulhlaup (flood). We have also observed increased seismic activity in the Katla caldera 7-9 September, probably connected to the draining of water from the glacier. Such flooding is common from the ice cap at this time of year."},{"id":20,"published_at":"2014-09-17T12:10:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The colour code has been moved back to green on 11 September due to decreased seismic activity and confirmation that no changes in the geothermal system have been occurred in the last month."},{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"The Holuhraun eruption is still ongoing."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Normal background activity"},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"We still observe a few events at Tungnafellsjökull and SE of it, as we have since the beginning of the unrest in Bárðarbunga."}],"additional_notes":"Factsheet Bardarbunga 17.09.2014 Measurements show that the lava field in Holuhraun continues to expand. There are no signs of decreasing lava production. The subsidence of the Bardarbunga caldera continues with the rate of about 50 cm over the last 24 hours. Seismic activity has been rather intensive over the last 24 hours. Yesterday 7 earthquakes larger then M3,0 were detected in Bardarbunga. The biggest were M5,4 and M4,8 last night. Smaller earthquakes were detected in Dyngjujokull glacier and in north part of the dyke. GPS monitoring show irregularity in in the crustal movements over the last few days. This sign could indicate that the magma movement under Bardarbunga is changing. No change has been detected in water measurement. Air quality: A prediction from the Icelandic Met Office: Easterly winds with the polluted area to the west and southwest, marked by Langjokull glacier in the west and Tindfjoll in the south. Valid until noon tomorrow, Thursday. Three scenarios are considered most likely: The eruption on Holuhraun declines gradually and subsidence of the Bardarbunga caldera stops. Large-scale subsidence of the caldera occurs, prolonging or strengthening the eruption on Holuhraun. In this situation, it is likely that the eruptive fissure would lengthen southwards under Dyngjujokull, resulting in a jokulhlaup and an ash-producing eruption. It is also possible that eruptive fissures could develop in another location under the glacier. Large-scale subsidence of the caldera occurs, causing an eruption at the edge of the caldera. Such an eruption would melt large quantities of ice, leading to a major jokulhlaup, accompanied by ashfall. Other scenarios cannot be excluded."},{"id":21,"published_at":"2014-09-24T11:40:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"The Holuhraun eruption is still ongoing."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"A magnitude 2.7 earthquake occurred on the southwestern rim of the Katla caldera yestarday, about 5 smaller events were detected at the same location before and after. Event depths are around 1-4 km, these are clearly brittle earthquakes"},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"We still observe a few events at Tungnafellsjökull and SE of it, as we have since the beginning of the unrest in Bárðarbunga."}],"additional_notes":"Factsheet Bardarbunga 24.09.2014 The volcanic eruption in Holuhraun continues with similar rate as last few days. The eruption does not seem to be declining. The lava field continues to grow and the lava production continues with the same strength. The subsidence of the Bardarbunga caldera continues with same rate as before. The total depression, since the unrest started, is now between 27 and 28 meters. Seismic activity in Bardarbunga continues on similar rate as the last few days. Eight earthquakes bigger then M3,0 were recorded since noon yesterday. The biggest one was M5,2 at 08:14 this morning. Smaller earthquakes were detected in north part of the dyke and around the eruption site. GPS measurements show that tectonic movements have been similar over last two weeks. No change was detected in water monitoring that cannot be explained with changing weather. Air quality: A prediction from the Icelandic Met Office: Easterly winds with the polluted area to the west and southwest, marked by Langjokull glacier in the west and Tindfjoll in the south. Valid until noon tomorrow, Thursday. Three scenarios are considered most likely: The eruption on Holuhraun declines gradually and subsidence of the Bardarbunga caldera stops. Large-scale subsidence of the caldera occurs, prolonging or strengthening the eruption on Holuhraun. In this situation, it is likely that the eruptive fissure would lengthen southwards under Dyngjujokull, resulting in a jokulhlaup and an ash-producing eruption. It is also possible that eruptive fissures could develop in another location under the glacier. Large-scale subsidence of the caldera occurs, causing an eruption at the edge of the caldera. Such an eruption would melt large quantities of ice, leading to a major jokulhlaup, accompanied by ashfall. Air quality: A prediction from the Icelandic Met Office: Pollution from the eruption is mostly expected north of the eruption today (Wednesday). A map showing the gas forecast can be found on the web page of the Icelandic Met Office www.vedur.is/vedur/spar/textaspar/oskufok/ An interactive map showing the gas distribution can be seen at www.vedur.is/vedur/spar/gasdreifing The Icelandic Met Office has also opened a web page where people can report if they have detected gas pollution. A link to the page can be found on the Icelandic version of the web page under Skrá mengun. Three scenarios are considered most likely: The eruption on Holuhraun declines gradually and subsidence of the Bardarbunga caldera stops. Large-scale subsidence of the caldera occurs, prolonging or strengthening the eruption on Holuhraun. In this situation, it is likely that the eruptive fissure would lengthen southwards under Dyngjujokull, resulting in a jokulhlaup and an ash-producing eruption. It is also possible that eruptive fissures could develop in another location under the glacier. Large-scale subsidence of the caldera occurs, causing an eruption at the edge of the caldera. Such an eruption would melt large quantities of ice, leading to a major jokulhlaup, accompanied by ash fall. Other scenarios cannot be excluded."},{"id":22,"published_at":"2014-10-01T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"The Holuhraun eruption is still ongoing."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Background seismic activity"},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"We still observe a few events at Tungnafellsjökull and SE of it, as we have since the beginning of the unrest in Bárðarbunga."}],"additional_notes":"Bardarbunga volcano 01.10.2014 The volcanic eruption in Holuhraun continues with similar rate as last few days. The eruption does not seem to be declining. The subsidence of the Bardarbunga caldera continues with the same rate as before. Seismic activity in Bardarbunga continues on similar rate as the last few days. Seven earthquakes larger than M5 have been recorded within the Bardarbunga caldera since last report. The largest event was M5.5 on 29 september. The largest earthquake along the dyke had a magnitude 2.8 yesterday evening. The eruption is still generating a gas-rich cloud."},{"id":23,"published_at":"2014-10-08T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"The Holuhraun eruption is still ongoing."},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"A few events per week still observed"}],"additional_notes":"Bardarbunga volcano 08.10.2014 The volcanic eruption in Holuhraun continues with similar rate as last few days. The eruption does not seem to be declining. The eruption is still generating a gas-rich cloud. The subsidence of the Bardarbunga caldera continues with the same rate as before. Seismic activity in Bardarbunga continues on similar rate as the last few days. Seismicity in the dyke is slowly decreasing. Six earthquakes of magnitude M5 and larger have been recorded within the Bardarbunga caldera since last report. The largest event was M5.5 on 7 October."},{"id":24,"published_at":"2014-10-15T13:25:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"The Holuhraun eruption is still ongoing."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"A small swarm within the caldera"},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"A few events per week still observed"}],"additional_notes":"Katla: A swarm of ~10 events was detected at eastern Katla caldera on Saturday 11 October. The largest events was of magnitude 3.3. Bardarbunga volcano 15.10.2014 The volcanic eruption in Holuhraun continues with similar rate as last few days. The eruption does not seem to be declining. The eruption is still generating a gas-rich cloud. The subsidence of the Bardarbunga caldera continues with the same rate as before. Seismic activity in Bardarbunga continues and the rate of (smaller) events has increased for the past week. Seismicity in the dyke is similar, now showing activity from the eruption site and southwards to ~10 km within the edge of Dyngjujökull. Seven earthquakes of magnitude M5 and larger have been recorded within the Bardarbunga caldera since last report. The largest and most recent one occurred today at 11:16 of magnitude 5.4 at the northern caldera rim."},{"id":25,"published_at":"2014-10-22T12:45:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Increased electric conductivity in Múlakvísl river"},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"Activity decreased to background"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues with similar rate as in recent days. No signs of declining activity. Still significant gas emission. Continuous subsidence of the Bardarbunga caldera. Seismic activity on the caldera rim continues at comparable rates as in recent weeks. Six earthquakes exceeded magnitude 5 during the week, the strongest was Mw5.4 on 18 October. Seismic moment release is significantly larger on the northern caldera rim than on the southern. Earthquake activity in the northern part of the dyke intrusion continuous with rates of 10-30 events per day, all smaller than M2. Katla: Following a small earthquake swarm on Saturday 11 October (see last report), electric conductivity in the river Múlakvísl south-east of Katla increased from its background of 130-150 µS/cm to presently more than 250 µS/cm. However no signs of increased water levels or flood tremor are detected, seismic activity has been low in recent days. Tungnafellsjökull: Following increased seismic activity during last week, activity has significantly decreased since 17 October and is now back to background."},{"id":26,"published_at":"2014-10-29T13:15:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Electric conductivity in Múlakvísl river back to normal"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues with similar rate as in recent days. No signs of declining activity. Still significant gas emission. Continuous subsidence of the Bardarbunga caldera. Seismic activity on the caldera rim continues at comparable rates as in recent weeks. Six earthquakes exceeded magnitude 5 during the week, the strongest was Mw5.3 on 26 and another on 27 October. Seismic moment release is significantly larger on the northern caldera rim than on the southern. Earthquake activity in the northern part of the dyke intrusion continuous with rates of 10-30 events per day, all smaller than M2."},{"id":27,"published_at":"2014-11-05T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues at the same rate as in previous weeks. There are no signs of declining activity. The gas emission is still significant. The Bárdarbunga caldera continues to subside. During the last week, five earthquakes exceeded magnitude 5. Earthquakes of magnitude less than 2 continue to occur in the northern part of the dyke intrusion."},{"id":28,"published_at":"2014-11-12T12:35:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"A deep eartquake in the eastern Katla caldera. These earthquakes occur off and on."}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues at the same rate as in previous weeks. There are no signs of declining activity. The gas emission is still significant. The Bárdarbunga caldera continues to subside. Due to maintainance, the Bardarbunga subsidence graph gives a false rise of ~1.5 m at noon 11 November. The GPS station had to be lifted so that it would not become covered in snow and work continued until midnight. By morning, the readings became reliable again. The apparent rise of the caldera is not real. During the last week, three earthquakes exceeded magnitude 5. Earthquakes of magnitude less than 2 continue to occur in the northern part of the dyke intrusion."},{"id":29,"published_at":"2014-11-19T12:20:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues with similar rates as in recent days. Still significant gas emission. Continuous subsidence of the Bardarbunga caldera. Seismic activity on the caldera rim continues at comparable rates, however the number of earthquakes M>5 seems to have sightly decreased in recent weeks. Two earthquakes of M5.4 occurred on Friday 14.11. at 11:25 (southern caldera rim) and Sunday 16.11. at 01:37 (northern rim), all together around 160 earthquakes of M>3 were detected. In the dyke intrusion most activity clusters in the northern part between the eruption site and to the south some kilometers into Dyngjujökull, event rates are around 10-30 earthquakes per day, all M<2, often increased event rates following M>5 events on the caldera rim."},{"id":30,"published_at":"2014-11-26T14:20:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues with similar rates as in recent days. Activity seems to be pulsating. Still significant gas emission. Due to communication problems the state of caldera subsidence is presently unknown. Seismic activity on the caldera rim continues at high rates, but has decreased following two M>5 earthquakes. One earthquakes of M5.1 occurred on Sunday 23.11. at 09:22 (southern caldera rim) and M5.4 on Monday morning at 09:03. Similar patterns of increased activity before and decreased activity following major earthquakes have been frequently observed at Bardarbunga in recent weeks. In the dyke intrusion most activity clusters in the northern part between the eruption site and to the south some kilometers into Dyngjujökull, event rates are around 10-30 earthquakes per day, all M<2, often increased event rates following M>5 events on the caldera rim."},{"id":31,"published_at":"2014-12-03T14:10:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues, seismicity rates around Bárðarbunga are still high. The overall assessment indicates slight decrease of activity throughout the last three months. Seismic activity on the caldera rim continues at high rates. Largest earthquakes were on Friday (28 Nov) at 06:14 M5.1, Monday (1 December) at 12:52 M5.2 and on Tuesday (2 December) at 02:18 M5.4. Activity in the dyke intrusion was comparably low."},{"id":32,"published_at":"2014-12-10T12:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues, seismicity rates around Bárðarbunga are still high. The overall assessment indicates slight decrease of activity throughout the last three months. Seismic activity on the Bardarbunga caldera rim continues at high rates. The largest earthquake was on 12 December at 21:04, M5.1. About 40 earthquakes in Bardarbunga volcano had magnitudes between 4 and 5. Activity in the dyke intrusion was comparably low."},{"id":33,"published_at":"2014-12-24T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues, seismicity rates around Bárðarbunga are still high. The overall assessment indicates a slight decrease of activity throughout the last three months. Seismic activity on the Bardarbunga caldera rim continues at high rates. The largest earthquake was on 17 December at 13:58, M5.3. About 23 earthquakes in Bardarbunga volcano had magnitudes between 4 and 5 and about 50 between 3 and 4. Activity in the dyke intrusion was comparably low. Tungnafellsjökull: Earthquakes at Tungnafellsjökull have been observed since the beginning of the unrest in Bárðarbunga. An earthquake swarm has been ongoing south of Langjökull, about 10 km northnorthwest of the Geysir area since last weekend. The earthquakes are at shallow depths (2-3km) and the largest event had a magnitude 2.5 this night. There is no sign of volcanic unrest in this area."},{"id":34,"published_at":"2014-12-31T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues, seismicity rates around Bárðarbunga are still high. The overall assessment indicates a slight decrease of activity throughout the last three months. Seismic activity on the Bardarbunga caldera rim continues at high rates. The largest earthquake was on December 30 at 00:11, M5.3. About 16 earthquakes in Bardarbunga volcano had magnitudes between 4 and 5 and 45 between 3 and 4. Activity in the dyke intrusion was low. Tungnafellsjökull: Earthquakes at Tungnafellsjökull have been observed since the beginning of the unrest in Bárðarbunga. The earthquake swarm south of Langjökull seems to have stopped."},{"id":35,"published_at":"2015-01-04T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"fissure eruption in Holuhraun and caldera subsidence ongoing"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues with stable rates. Subsidence of the Bardarbunga caldera continues. Seismic activity continues at similar rates. The strongest earthquakes detected in the last week were of magnitude 4.6 occurring on 29 January and 2 February. Both were located at the southern caldera rim. No earthquake has exceeded M5 since 8 January. On average, 20-50 earthquakes are recorded daily around the Bárdarbunga caldera and around 10-20 in the dyke intrusion. Earthquakes in the dyke were all below magnitude M2."},{"id":36,"published_at":"2015-01-07T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues, seismicity rates around Bárðarbunga are still high. The overall assessment indicates a slight decrease of activity throughout the last three months. Seismic activity on the Bardarbunga caldera rim continues at high rates. The largest earthquake was on January 05 at 21:53, M4.9. About 20 earthquakes in Bardarbunga volcano had magnitudes between 4 and 5. Activity in the dyke intrusion was low. Tungnafellsjökull: Earthquakes at Tungnafellsjökull have been observed since the beginning of the unrest in Bárðarbunga."},{"id":37,"published_at":"2015-01-11T10:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"fissure eruption in Holuhraun and caldera subsidence ongoing"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues. Subsidence of the Bardarbunga caldera continues. Seismic activity seems to be slightly declining. The strongest earthquake detected in the last week was of magnitude 4.9 occurring on 6 February. No earthquake has exceeded M5 since 8 January. The largest earthquakes in the dyke were around magnitude M2."},{"id":38,"published_at":"2015-01-14T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing fissure eruption in Holuhraun / caldera subsidence"},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"A magnitude 3.1 earthquake on January 13 at 13:17"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues, seismicity rates around Bárðarbunga are still high. The overall assessment indicates a slight decrease of activity throughout the last three months. Seismic activity on the Bardarbunga caldera rim continues at high rates. The largest earthquake was on January 8 at 18:47, M5.1. About 30 earthquakes in Bardarbunga volcano had magnitudes between 4 and 5. Seismicity in the dyke intrusion has been persistent at low levels comparable to recent weeks. Tungnafellsjökull: Earthquakes at Tungnafellsjökull have been observed since the beginning of the unrest in Bárðarbunga."},{"id":39,"published_at":"2015-01-21T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"fissure eruption in Holuhraun and caldera subsidence ongoing"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"slightly increased seismic activity"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues with stable rates (~50-70 m³/s). Subsidence of the Bardarbunga caldera continues. The overall activity has however slowly decreased in recent weeks. Seismic activity on the caldera rim is slightly lower compared to last month. Strongest earthquakes during the last 7 days were M4.8 on Sunday 18 January at 22:27 on the northern caldera rim and M4.7 on Tuesday 20 January at 10:32 on the southern rim. No earthquake has exceeded M5 since almost two weeks. On average around 50-60 earthquakes per day are presently detected around the caldera and around 15-20 per day in the dyke intrusion. None of the events in the dyke was larger than M2 during the week. Katla: A very slightly increase of seismic activity is observed at Katla during the last weeks. Most events are shallow at about 1-3 km and they are all smaller than M1.5. No spatial or temporal clustering has been observed."},{"id":40,"published_at":"2015-01-28T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"fissure eruption in Holuhraun and caldera subsidence ongoing"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun continues with stable rates. Subsidence of the Bardarbunga caldera continues. Seismic activity continues at a similar rate as during last week. Strongest earthquake during the last seven days was a magnitude 4.9 event at 07:25 on 24th of January, at the northern caldera rim, were the majority of the caldera events occur. No earthquake has exceeded M5 since January 8th. On average around 40-50 earthquakes per day are presently detected around the caldera and around 10-20 per day in the dyke intrusion. The events in the dyke were up to magnitude M1.6 during the week, most of them below M1. Katla: No signs of increased activity."},{"id":41,"published_at":"2015-02-18T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"fissure eruption in Holuhraun and caldera subsidence ongoing, activity steadily decaying"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera and in the dyke intrusion are slowly decaying, the same trend is observed for the fissure eruption in Holuhraun. The strongest earthquake observed in the past week was M4.5 on 13 February at 21:22 UTC, another 12 events exceeded M3. A total of about 150 events was detected around the caldera. In the dyke intrusion none of the approximately 100 detected events exceeded M2. Although activity has been steadily decreasing in recent weeks, seismicity rates are still considerable and the fissure eruption is still forceful."},{"id":42,"published_at":"2015-02-25T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"ORANGE","vals_level":null,"status_text":"fissure eruption in Holuhraun and caldera subsidence ongoing, activity steadily decaying"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"On 21 February at 02:26 an M3.3 earthquake in the western part of the caldera. This event is not unusual."}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera and in the dyke intrusion is generally decaying, the same trend is observed for the fissure eruption in Holuhraun. The strongest earthquake observed in the past week was M4.3 on 19 February at 01:26 UTC, another 5 events exceeded M3. A total of about 130 events was detected around the caldera. In the dyke intrusion none of the approximately 160 detected events exceeded M1.6 Seismic activity has decreased around Bárðarbunga caldera since last week. Seismicity at the northern part of the dyke is still considerable."},{"id":43,"published_at":"2015-03-04T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"YELLOW","vals_level":null,"status_text":"Colour code lowered to YELLOW, fissure eruption has stopped, caldera seismicity decreasing, dyke seismicity stable"}],"additional_notes":"Bárðarbunga: The fissure eruption in Holuhraun has stopped on Friday 27.02.2015. Consequently, the aviation colour code for Bárðarbunga has been lowered to YELLOW on Saturday 28.02.2015. Seismic activity around the Bárðarbunga caldera continues to slowly decrease, hardly any earthquake exceeded magnitude 2 during the last week. Seismic activity in the dyke intrusion remains stable. The number of detected events is presently slightly higher than in recent weeks, most likely due to improved signal-noise conditions since the eruption has stopped (the absence of volcanic tremor allows for detecting smaller events now). As the maximum magnitudes remain stable (<2), the slightly increased number of detected events does not evidence an increase of the overall activity in the dyke. Ongoing activity in the dyke is not unexpected, as the dyke is probably readjusting its shape after magma flow has stopped."},{"id":44,"published_at":"2015-03-11T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"YELLOW","vals_level":null,"status_text":"Fissure eruption has stopped, caldera seismicity decreasing, dyke seismicity stable"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera continues to decrease slowly. In the last week, about ten earthquakes were detected daily, the largest around magnitude 2.5. Seismic activity in the dyke intrusion was similar to the week before. All earthquakes were of magnitude less than 2. Ongoing activity in the dyke is not unexpected, as the dyke is probably readjusting after the magma flow."},{"id":45,"published_at":"2015-03-18T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"YELLOW","vals_level":null,"status_text":"Fissure eruption has stopped, caldera seismicity decreasing, dyke seismicity slightly decreasing"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera continues to decrease. In the last week, about five earthquakes were detected daily and all had a magnitude less than 2 except one that had a magnitude 3.1 on 13 March at 18:43 UTC. Seismic activity in the dyke intrusion is slightly decreasing. All earthquakes were of magnitude less than 2. Ongoing activity in the dyke is not unexpected, as the dyke is probably readjusting after the magma flow."},{"id":46,"published_at":"2015-03-25T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"YELLOW","vals_level":null,"status_text":"seismic activity continues to decrease slowly"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"small earthquake sequence"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera continues to decrease slowly. No earthquake exceeded magnitude 2 during the last week. Activity in the dyke intrusion is still persistent with event rates of 20-30 events per day, all M<2. Öræfajökull: A small sequence of nine events has occurred between 20. and 22. March, the strongest event was M2.4. Similar sequences are observed once or twice per year, no further events have followed since 22. March."},{"id":47,"published_at":"2015-04-01T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"YELLOW","vals_level":null,"status_text":"seismic activity continues to decrease slowly"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"four earthquakes NE of Hekla"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"small earthquake sequence"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera continues to decrease slowly. The strongest earthquake last week was 2,4. Activity in the dyke intrusion is still persistent with event rates of 20-30 events per day, all M<2. Öræfajökull: Between 25. and 26. March another sequence of around six earthquakes was detected in Öræfajökull at the same location as last week. None of them exceeded magnitude 2. Hekla: Four earthquakes up to magnitude 1,5 have been detected NE of Hekla at around 15 km depth. The same cluster has previously been active in March 2013 and 2014."},{"id":48,"published_at":"2015-04-08T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"YELLOW","vals_level":null,"status_text":"seismic activity continues to decrease slowly"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"one small earthquake NE of Hekla"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera continues to decrease slowly. The largest earthquakes last week were around magnitude 2. Activity in the dyke intrusion is still persistent with event rates of 20-30 per day, all smaller than magnitude 2. Öræfajökull: No earthquakes were recorded in the area in the last week. Hekla: Only one earthquake of magnitude 0.1 was located northeast of Hekla volcano."},{"id":49,"published_at":"2015-04-15T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seismicity continues to decline slowly"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes about the Vatnafjöll region"}],"additional_notes":"Bárðarbunga: Seismicity in and around Bárðarbunga is decreasing slowly. The largest earthquakes last week were around magnitude 2. See: http://hraun.vedur.is/ja/viku/2015/vika_15/bab.gif Activity in the dyke intrusion continues at a rate of about 20 earthquakes per day, all less than magnitude 1.8. Given the regional-scale effects of the recent eruption, such residual seismicity is to be expected. The aviation colour-code for Bárðarbunga remains at yellow. Vatnafjöll region (south of Hekla): Since 9 April 2015, over 30 micro-earthquakes have occurred in the Vatnafjöll region, about 10 km south of the summit of Hekla. See: http://hraun.vedur.is/ja/viku/2015/vika_15/sud.gif The epicentres of the earthquakes delineate a 0.5-km-long fault, trending towards the north-east. Earthquakes range in size from magnitude 0 to 2.7, originating mostly at 4 km depth. The seismicity appears to be tectonic in nature and it has declined; the last recorded earthquakes were on 13 April. Hekla continues to be monitored closely and there are no signs that the seismicity at Vatnafjöll is associated with potential unrest at Hekla. The aviation colour-code for Hekla is green."},{"id":50,"published_at":"2015-04-22T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seismicity continues to decline"}],"additional_notes":"Bárðarbunga: Seismicity in and around Bárðarbunga continues to decrease. The largest earthquakes last week were around magnitude 2. Seismic activity in the dyke intrusion continues at a rate of about 10-15 earthquakes per day, all less than magnitude 1.5. Vatnafjöll region (south of Hekla): The seismic activity that occurred over a week ago in the Vatnafjöll region, about 10 km south of the summit of Hekla has ended."},{"id":51,"published_at":"2015-04-29T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity continues to decline"}],"additional_notes":"Bárðarbunga:\nThe Aviation Colour Code for Bárðarbunga was set back to “Green” on Friday 24.04.2015, as seismic activity is declining since the end of the eruption on 27.02.2015. Although there are still around 10-20 earthquakes of magnitude smaller than 2 detected in the dyke intrusion each day, the system is regarded as having calmed down to background activity again. Seismicity around the caldera rim has been very low compared to previous weeks."},{"id":52,"published_at":"2015-05-06T11:25:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity continues to decline"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Deep seismic activity"}],"additional_notes":"Bárðarbunga: Still around 10-15 earthquakes per day in the dyke intrusion, all M<2. Low activity at the Bárðarbunga caldera, strongest earthquake during the week was M2.6. The overall activity continues to decline. Katla: A known cluster of deep seismic activity (20-25km depth) has recently been quite active. Two pulses of events were detected in the previous week, one during the week of this report on 1st May. The duration of these pulses is in the range of 3-10 minutes. Volcanic earthquakes at such depths are most likely linked to magma movements, as the crust is likely to be visco-elastic and thus requires efficient strain load to cause brittle failure. No signs of magma ascent are observed and no reaction of the shallower part of the system was detected following these events. Similar activity has been observed frequently in recent years, it was though comparably high (number of pulses, strength and duration of pulses) in the two past weeks. Hamarinn: A M3.2 earthquake occurred east of Hamarinn on the so called Loki ridge on Monday 4th May at 08:28. Hamarinn volcano is located west of Grímsvötn and south-southwest of Bárðarbunga, it is not listed above. The Loki ridge is known for frequent seismic activity, however no activity has followed this event."},{"id":53,"published_at":"2015-05-13T11:20:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity continues to decline"}],"additional_notes":"Bárðarbunga: Several small earthquakes are still recorded daily in the dyke intrusion. This week they were all below magnitude 1.5 except one magnitude 2.2. Activity at the Bárðarbunga caldera is low, the strongest earthquake of magnitude 1.6. The overall activity continues to decline. Katla: No deep seismic activity was recorded during the last week."},{"id":54,"published_at":"2015-05-20T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity continues to decline"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes of magnitude 0.2 and 0.3 with origin about 5 km and 8 km northeast of Hekla at depths of 6 km and 10 km on 18 May and 19 May"}],"additional_notes":"Bárðarbunga: Several small earthquakes are still recorded daily in the dyke intrusion. This week they were all below magnitude 1.4 . Seismic activity at the Bárðarbunga caldera is low, the strongest earthquake of magnitude 2.0. The overall activity continues to decline. Katla: This morning on 20 May between 05:35 and 05:45 UTC several earthquakes at depth below 20 km occurred below the eastern Katla caldera rim. A minor glacial outburst flood (jökulhlaup) occurred in the river Gígjukvísl on Skeiðarársandur last week. It peaked in the morning of 14 May. The flood originated from the subglacial lake Grímsvötn."},{"id":55,"published_at":"2015-05-27T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity is slightly declining"}],"additional_notes":"Bárðarbunga: Several small earthquakes are still recorded daily in the dyke intrusion. This week they were all below magnitude 1.5 . Seismic activity at the Bárðarbunga caldera is low, the strongest earthquake of magnitude 1.5. The overall activity continues to decline slightly. The glacial outburst flood (jökulhlaup) in the river Gígjukvísl on Skeiðarársandur (originated from the subglacial lake Grímsvötn) came to an end on 21 May."},{"id":56,"published_at":"2015-06-03T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity is slightly declining"}],"additional_notes":"Bárðarbunga: Several small earthquakes are still recorded daily in the dyke intrusion and this week they were all below magnitude 1.3 . Seismic activity at the Bárðarbunga caldera is low, the strongest earthquake had a magnitude 2.2. The seismic activity continues to decline slightly."},{"id":57,"published_at":"2015-06-10T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"seismicity slowly declining"}],"additional_notes":"Bárðarbunga: Seismic activity in the caldera is low, 3-5 events were detected per day, none of them exceeding magnitude 1.5. Activity in the dyke intrusion remains rather stable at rates of 15-20 events per day, the strongest of them was magnitude 1.9."},{"id":58,"published_at":"2015-06-18T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"seismicity slowly declining"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See note for Skaftárcauldron"}],"additional_notes":"Bárðarbunga: Seismic activity in the caldera is low. A magnitude 3.3 events was recorded 10 June (19:13) on the norther caldera rim. It is likely a aftershock due to the readjustment after the caldera collapse. Activity in the dyke intrusion remains rather stable, the strongest of them was magnitude 2. Skaftár cauldron (17 km northwest of Grímsvötn): A small glacial outburst flood occurred in Skaftá southwest of Vatnajökull started 17 June at 08:00. It originates from Skaftár cauldron where geothermal water accumulates and drains at irregular intervals (approximately every 1-3 years). It reached its maximum this morning and is expected to decline in the next three to four days. Low amplitude seismic tremor was observed on the closest stations."},{"id":59,"published_at":"2015-06-24T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"seismicity slowly declining"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"see below: Skaftá cauldron"}],"additional_notes":"Bárðarbunga: Aftershock activity in the caldera is slowly declining. Earthquake activity in the dyke intrusion continues. Skaftá cauldron: The glacial outburst flood from the cauldron into the Skaftá river that started on 17 June last week has ended."},{"id":60,"published_at":"2015-07-01T15:00:00Z","entries":[{"volcano_code":"ELD","vona_color_code":"YELLOW","vals_level":null,"status_text":"An intense earthquake swarm started on 30 June around 21:00 near Geirfuglasker on the Reykjanes Ridge, about 30 km southwest of Reykjanestá. The first burst of activity calmed down around midnight and activity is since occurring in pulses with two to three hours in between. The strongest earthquakes detected since the onset of the swarm were M5.0 at 02:25 and M4.9 at 04:59 on the morning of 1 July. These earthquakes were felt on the Reykjanes peninsula, in Akranes and by people on fishing vessels near the Reykjanes rigde. A few more earthquakes have been measured with magnitude larger than 4 and all together around 400 events have so far been observed."}],"additional_notes":"Eldey:\nSimilar swarms have been recorded in previous years and have generally lasted up to a couple of days without resulting in an observable eruption. Indeed, the area is known for frequent eruptive activity with two recognized eruptions per century. IMO is currently using the Aviation Color Code map to report the status of active volcanic systems in Iceland and providing warning related to unusual activity. Based on the evidence that the current seismicity is well above the normal (monthly averaged) background condition, IMO's scientists decided to raise the aviation color code for Eldey volcano from \"green\" to \"yellow\". IMO is monitoring the activity closely."},{"id":61,"published_at":"2015-07-08T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"seismicity slowly declining"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Colour code back to GREEN"}],"additional_notes":"Bárðarbunga: Seismic activity in the caldera is low, same as in recent weeks. Seismicity in the dyke intrusion is persistent, but also shows slight signs of slow decline. Presently around 10-15 microearthquakes are detected in the dyke per day, none of them exceeding M2 during the last week. Eldey: The volcanic system of Eldey was shortly set on ACC “YELLOW” on Wednesday 01.07.2015, following an earthquake swarm about 15 km WSW of the island of Eldey. The strongest event was M5.0 on 01.07.2015 at 02:25, four more events were M>4 and all together around 550 events were detected. Activity declined quickly on 02.07.2015, on Friday 03.07.2015 the ACC was set back to “GREEN”. Only few events have followed since, the strongest was M3.3 on 07.07.2015 at 20:25. Subsequent deeper analysis of the seismic data suggests that this sequence was mainly driven tectonically."},{"id":62,"published_at":"2015-07-15T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity declining slowly."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Residual micro-seismicity following an earthquake swarm on 1–2 July."},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"Short-lived seismic swarm between 9–10 July (see notes, below)."}],"additional_notes":"Bárðarbunga: Similar to recent weeks, seismic activity in the caldera is low. Activity continues in the dyke intrusion, although from a long-term perspective it is decaying. Presently 10–15 micro-earthquakes are detected on a daily basis in the dyke. Such seismicity is to be expected following the Holuhraun eruption. Eldey: Seismicity in the Eldey volcanic system has remained low since a short-lived earthquake swarm on 1–2 July. Tungnafellsjökull: Between 9–10 July an intense swarm of earthquakes occurred beneath Tungnafellsjökull. Over 70 earthquakes were recorded, the largest of which was 1.8 in magnitude."},{"id":63,"published_at":"2015-07-22T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity declining slowly."}],"additional_notes":"Bárðarbunga: Similar to recent weeks, seismic activity in the caldera is low. Activity continues in the dyke intrusion, although from a long-term perspective it is decaying. Presently 10–15 micro-earthquakes are detected on a daily basis in the dyke. Such seismicity is to be expected following the Holuhraun eruption."},{"id":64,"published_at":"2015-07-29T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity declining slowly."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"A minor flood occurred from the north-western part of Mýrdalsjökull (see additional notes)."}],"additional_notes":"Katla: On 22 July a minor outburst flood (jökulhlaup) began from Entujökull - a glacier on the north-western side of Mýrdalsjökull. The flood was detected on Markarfljot at Einhyrningsflatir. A localised stench of hydrogen sulphide accompanied the flood, implying a geothermal origin for the meltwater. It is likely that meltwater drained from a water-body at the base of the ice-cap, formed gradually due to heat-release from a geothermal field. The flood occurred without an increase in seismicity from Katla. Minor floods from Entujökull are a near-annual occurrence. Bárðarbunga: Similar to recent weeks, seismic activity in the caldera is low. Presently 10–15 micro-earthquakes are detected on a daily basis in the dyke, although the overall trend is decreasing seismicity."},{"id":65,"published_at":"2015-08-05T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity declining slowly."}],"additional_notes":"Bárðarbunga: Similar to recent weeks, overall trend is decreasing seismicity."},{"id":66,"published_at":"2015-08-12T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity declining slowly."}],"additional_notes":"Bárðarbunga: Similar to recent weeks, overall trend is decreasing seismicity."},{"id":67,"published_at":"2015-08-19T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity declining slowly."}],"additional_notes":"Bárðarbunga: The overall trend is decreasing seismicity. Presently the earthquake rate is less than 5 eq per day within the caldera and less than 10 eq per day in the dyke."},{"id":68,"published_at":"2015-08-26T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity slowly declining"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera and in the dyke intrusion continues to decline. Strongest events on the caldera rim were around M2-2.5 and a total of around 30 earthquakes have been detected there. No event in the dyke exceeded M1.5 and event rates are around 8-10 earthquakes per day."},{"id":69,"published_at":"2015-09-02T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity declining slowly"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera and in the dyke intrusion continues to decline slowly. Earthquakes in and around the caldera have remained below magnitude 2.5, and the maximum seismicity rate for the entire region has been below 28 earthquakes per day. Micro-seismicity in the dyke intrusion, extending to the north-east from the Bárðarbunga caldera, remains low with an overall, long-term declining trend."},{"id":70,"published_at":"2015-09-09T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity declining"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera and in the dyke intrusion continues to decline. Earthquakes in and around the caldera have remained below magnitude 2.5, and the maximum seismicity rate for the entire region has been below 10-15 earthquakes per day. Micro-seismicity in the dyke intrusion, extending to the north-east from the Bárðarbunga caldera, remains low. Increasing wind speed since Monday (September 7th) has further decreased the number of detected microseismicity in the area this week (down to three events located per day this week)."},{"id":71,"published_at":"2015-09-16T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"slowly declining seismicity"}],"additional_notes":"Bárðarbunga: Seismic activity around the Bárðarbunga caldera and in the dyke intrusion has been more or less stable at low levels in the recent week. Activity rates around the caldera were around 5 events per day, maximum magnitude was 2.0. Around 5-10 events per day were detected in the dyke intrusion, all smaller than magnitude 1.5. A GPS site at the glacier edge WNW of the Bárðarbunga caldera has shown around 3 cm uplift in recent months, possibly suggesting reinflation of the system. This is a single point measurement of the closest GPS to the volcano. Although the signal is believed to be true, its source needs further investigation. There are for example no clear signs in InSAR measurements that would confirm this reinflation, also there are no changes in seismic activity."},{"id":72,"published_at":"2015-09-23T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"slowly declining seismicity"}],"additional_notes":"Bárðarbunga: About 50 earthquakes have been recorded close to the BB caldera, the largest one M3. About 70 earthquakes have been recorded just south of the eruption site (dyke) beneath Dyngjujökull. Mýrdalsjökull: Two earthquakes about M3 where recorded inside the caldera yesterday with shallow origin, possibly related to glacial deformation/geothermal changes. Tungnafellsjökull: A swarm started today at 7 am just north of the glacier. The swarm is in decline. The biggest earthquake recorded was 2.9. In general seismic activity is average throughout the country."},{"id":73,"published_at":"2015-09-30T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"slowly declining seismicity"}],"additional_notes":"Bárðarbunga: About 30 earthquakes have been recorded close to the BB caldera, the largest one M2.5. About 20 earthquakes have been recorded just south of the eruption site (dyke) beneath Dyngjujökull. Tungnafellsjökull: The swarm that started on 23 September is fading out. About 100 earthquakes have been detected and the largest earthquake had a magnitude 2.6. Floodwater is beginning to drain from the eastern Skaftá ice-cauldron, located beneath Vatnajökull . According to GPS measurements, the ice-surface above the lake began to subside late on 27 September. The rate of subsidence is increasing progressively, reflecting heightened discharge from the lake. The flood (jökulhlaup) will travel a distance of 40 km beneath western Vatnajökull, before entering the Skaftá river. The closest gauging station on Skaftá is at Sveinstindur, about 28 km downstream from the ice margin. The jökulhlaup will reach Sveinstindur at some point between Wednesday evening and the early hours of Thursday. The drainage of the lake does not pose a volcanic hazard. In general seismic activity is average throughout the country."},{"id":74,"published_at":"2015-10-07T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"slowly declining seismicity"}],"additional_notes":"Bárðarbunga: About 30 earthquakes have been recorded close to the BB caldera, the largest M3.1. About 15 earthquakes have been recorded just south of the eruption site (dyke) beneath Dyngjujökull. The Skaftá outburst flood that occurred last week has subsided. The flood peaked downstream in southern Iceland on 7 October, and water levels have since been in decline. Originating from a subglacial cauldron beneath Vatnajökull, the flood was accompanied by short-lived pulses of increased seismic tremor. These signals are thought to have originated from the geothermal region underlying the cauldron. It is likely that draining floodwater caused a pressure change sufficient to heighten geothermal activity. No further seismicity has occurred in the region of the cauldron since the flood ended. The flood is in no way associated with pre-eruptive activity beneath Vatnajökull. In general seismic activity is average throughout the country."},{"id":75,"published_at":"2015-10-14T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"slowly declining seismicity"}],"additional_notes":"Bárðarbunga: Despite that we still measure declining seismic activity around the Bárðarbunga caldera and the dyke, we will not mention this specifically in future reports, except if an increase in the activity will be detected. The Skaftá outburst flood that occurred two weeks ago has subsided, but its effect downstream are expected to be prolonged over the next month. An earthquake swarm counting about 80 events with magnitudes < 2.5 occurred at Herðubreiðartögl, 28 km NNE of the Askja system (approx. at 65.215°N and -16.336°E) last week but has decreased since then. Similar small swarms are common in the area."},{"id":76,"published_at":"2015-10-21T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Mw3.2 earthquake 16.10.2015"}],"additional_notes":"Bárðarbunga: A magnitude Mw3.2 earthquake was detected on the northern caldera rim of Bárðarbunga on 16. October at 06:45. Despite this event, activity in Bárðarbunga was the same as in previous weeks."},{"id":77,"published_at":"2015-10-28T11:00:00Z","entries":[],"additional_notes":"Usual background activity."},{"id":78,"published_at":"2015-11-04T11:00:00Z","entries":[],"additional_notes":"Usual background activity."},{"id":79,"published_at":"2015-11-11T13:15:00Z","entries":[],"additional_notes":"Usual background activity. Nothing to report."},{"id":80,"published_at":"2015-11-18T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 16th an earthquake M3.8 has been recorded within the SE part of the caldera."}],"additional_notes":"Bardarbunga: The monitoring group at the Icelandic Meteorologica Office (IMO) met this morning to discuss recent measurements around Bárðarbunga volcano. GPS data show signs of inflation in the area around Bárðarbunga which suggest magma recharging beneath the caldera. These signals have become clearer in the recent months. It is not uncommon that such inflation signals are measured after volcanic eruptions. For example the volcanoes Eyjafjallajökull, Grímsvötn and Hekla have all shown such behaviour. At a similar time the number of earthquakes with magnitudes between 2.5-3.8 has increased but otherwise the seismicity has not changed significantly. Bárðarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. For the rest of the country the overall assessment is low activity."},{"id":81,"published_at":"2015-11-25T11:00:00Z","entries":[],"additional_notes":"Bardarbunga: No signs of increased seismicity within the caldera since last week. Similar seismic activity as previous weeks. Bárðarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. Reykjanes Peninsula: A small seismic swarm occurred at Fagradalsfjall last weekend and all earthquakes in the swarm had magnitudes less than 2."},{"id":82,"published_at":"2015-12-02T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake M3.3 occurred at the northern rim of the caldera on 1 December at 03:51AM"}],"additional_notes":"Bardarbunga: No signs of increased seismicity within the caldera since last week. Similar seismic activity as previous weeks. Bárðarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption."},{"id":83,"published_at":"2015-12-09T11:00:00Z","entries":[],"additional_notes":"Bardarbunga: No signs of increased seismicity within the caldera since last week. Similar seismic activity as previous weeks. Bárðarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption."},{"id":84,"published_at":"2015-12-16T11:30:00Z","entries":[],"additional_notes":"Bardarbunga: No signs of increased seismicity within the caldera since last week. Similar seismic activity as previous weeks. Bárðarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. Geitlandsjokull/Langjokull (WRZ): A seismic swarm occurred in Geitlandsjokull in the western rift zone. It started on 10. December and lasted for a few days. The largest earthquake had a magnitude 3.5 and 2 others reached magnitude 3. This seismic activity is not unusual and there is no sign of volcanic activity in the area."},{"id":85,"published_at":"2015-12-23T14:47:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes just above M3.0 -----"}],"additional_notes":"Bardarbunga: No signs of increased seismicity within the caldera since last week. Similar seismic activity as previous weeks. Bárðarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. Two earthquakes were in the Bardarbunga caldera on December 20th, first at 02:23 am at the size of M3.5 and the later one at 02:27 had the sizw of M3.1. Everything has been calm since. No sign of volcanic activity in the area. Geitlandsjokull/Langjokull (WRZ): A seismic swarm occurred in Geitlandsjokull in the western rift zone. It started on 10. December and lasted for a few days. This seismic activity is not unusual and there is no sign of volcanic activity in the area."},{"id":86,"published_at":"2015-12-30T10:50:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes M3.3 -----"}],"additional_notes":"Bardarbunga: No signs of increased seismicity within the caldera since last week. Energy release from earthquakes has increased since the middle of September 2015 in the caldera, however seismic activity as similar as in previous weeks. Two earthquakes M3.3 were in the Bardarbunga caldera on December 26th, at 02:32 and at 04:51. Everything has been calm since. Bárðarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. No sign of volcanic activity."},{"id":87,"published_at":"2016-01-06T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 and M3.3 earthquakes on 4 January and M3.0 eq on 5 January in the caldera"}],"additional_notes":"Bardarbunga: No signs of increased seismicity within the caldera since last week. Energy release from earthquakes has increased since the middle of September 2015 in the caldera, however seismic activity is similar as in previous weeks. Two M3.2 and M3.3 earthquakes occurred in the caldera on 4 January at 01:31 and 01:33 and one M3.0 earthquake occurred on 5 January at 01:24. Bárðarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. No sign of volcanic activity."},{"id":88,"published_at":"2016-01-13T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 on the northen rim of the caldera on the 10th of january at 05:18"}],"additional_notes":"Bardarbunga: No signs of increased seismicity within the caldera since last week. Energy release from earthquakes has increased since the middle of September 2015 in the caldera, however seismic activity is similar as in previous weeks. One M3.2 earthquakes occurred in the caldera on 10 January at 05:18. Bárðarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. No sign of volcanic activity. An M3.2 earthquake occurred on Loki ridge in the western part of Vatnajokull ice cap on 10 January at 08:46."},{"id":89,"published_at":"2016-01-20T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 in the caldera on the 13th of January at 20:13"}],"additional_notes":"Bardarbunga: One M3.2 earthquake occurred in the caldera on the 13th January at 20:13. Five deep earthquakes were also recorded on the 16th of January a few km SE of the Bardabunga caldera. Such activity is not unusual in this region and it has been already observed both before and after the eruption. Bardarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. No sign of volcanic activity."},{"id":90,"published_at":"2016-01-27T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.6 eq in the caldera on 20 January at 13:05"}],"additional_notes":"Bardarbunga: One M3.6 earthquake occurred in the southern part of the caldera on 20 January at 13:05. Seismic activity is similar as in previous weeks. Bardarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. No sign of volcanic activity."},{"id":91,"published_at":"2016-02-03T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.0 eq in the caldera on 2 February at 04:45"}],"additional_notes":"Bardarbunga: One M3.0 earthquake occurred in the southern part of the caldera on 2 February at 04:45 Seismic activity is similar as in previous weeks. Bardarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. No sign of volcanic activity."},{"id":92,"published_at":"2016-02-10T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 eq in the caldera on 7 February at 09:31"}],"additional_notes":"Bardarbunga: One M3.5 earthquake occurred in the southern part of the caldera on 7 February at 09:31 Seismic activity is similar as in previous weeks. Bardarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. No sign of volcanic activity. Reykjanes Peninsula: An M3.9 earthquake occurred in the southern part of Kleifarvatn lake within the Krysuvik fissure swarm on the Reykjanes Peninsula on 3 February at 19:50. It was followed by several smaller aftershocks. There is no signs of volcanic activity in the area."},{"id":93,"published_at":"2016-02-17T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.6 eq in the caldera on 13th of February at 19:38 and M3.3 eq in the caldera on 11th of February at 05:20"}],"additional_notes":"Bardarbunga: Two earthquakes with magnitude greater than 3 occurred at the northern rim of the Bardarbunga Caldera. M3.3 occurred on the 11th of february at 05:20 and M3.6 occurred on the 13th of february at 19:38. Bardarbunga volcano is being monitored 24 hours at IMO and there are currently no signs of an impending eruption. No sign of volcanic activity. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":94,"published_at":"2016-02-24T11:00:00Z","entries":[],"additional_notes":"Herðubreið / Herðubreiðartögl: Seismic activity around Herðubreið and Herðubreiðartögl (northeast of Askja volcano) has been slightly above background levels in recent days. None of the earthquakes exceeded magnitude three and seismic activity in the area is not uncommon. Activity is below or around background levels in the rest of the country."},{"id":95,"published_at":"2016-03-02T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"On 2 March at 00:34 M3.1 and two at 10:05 M3.3 and M3.6 earthquakes"}],"additional_notes":"Bardarbunga: Three earthquakes with magnitude greater than 3 occurred within the Bardarbunga caldera this night and morning on 2 March. At 00:34 an M3.1 earthquake at the southern rim and at 10:05 two earthquakes , M3.3 and M3.6 at the northern rim. Two pulses of deep (> 15 km) small events occurred southeast of Bardarbunga on 27 February around 07:50-07:55 and on 28 February around 00:38-00:43. There is no sign of volcanic activity. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":96,"published_at":"2016-03-09T11:00:00Z","entries":[],"additional_notes":"For the whole country the overall assessment is usual background levels of seismic activity."},{"id":97,"published_at":"2016-03-16T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Pulse of deep earthquakes on 15.03."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 earthquake on 10.03."}],"additional_notes":"Bárðarbunga:\nA M3.2 earthquake occurred on the northern caldera rim of Bárðarbunga on 10. March at 08:26. No other event exceeded M2.0 in the caldera and a total of around 40 events were detected during the week. Rather low activity was observed in the dyke intrusion, all of the around 10 detected events were smaller than M1.0.\nAskja:\nA pulse of around 10 deep earthquakes (all M<1.0) was detected north of lake Öskjuvatn at Askja volcano. The pulse occurred on 15. March between 07:46 and 07:52, event depths were around 15–22 km. Such pulses are observed occasionally in several volcanically active areas in Iceland and they are supposedly linked to magma movements at depth. Frequencies of the events are comparably low (around 3 Hz), which is most likely due to a slower rupture velocity as the crust behaves visco-elastic at such depths. No reaction of the shallow volcanic system has been observed following the recent pulse and any other previous comparable pulse in that area."},{"id":98,"published_at":"2016-03-23T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 earthquake on 16.03. M3.3 earthquake on 22.03."}],"additional_notes":"Bárðarbunga:\nTwo earthquakes in Bárðarbunga were larger than magnitude 3 during the week, M3.4 on 16. March at 23:33 on the southern caldera rim and M3.3 on 22. March at 17:21 on the northern caldera rim. The latter event was followed by several aftershocks. A total of around 50 earthquakes have been detected around the caldera during the week. The dike intrusion under Dyngjujökull was comparably quiet, only around 10 earthquakes have been detected there, all smaller than M1."},{"id":99,"published_at":"2016-03-30T11:00:00Z","entries":[],"additional_notes":"Mýrdalsjökull A pulse of deep events (~20km depth) in the Katla caldera occurred on the 30th of Mars around 03:40. No sign of volcanic activity. For the rest of the country the overall assessment is usual background levels of seismic activity"},{"id":100,"published_at":"2016-04-06T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 earthquake on 3 April at 15.17 and M3.3 on 5 April at 02:25"}],"additional_notes":"Bardarbunga volcano: An M3.4 earthquake occurred at the southern rim of the Bardarbunga caldera on 3 April at 15:17 and an M3.3 earthquake occurred at the northern rim of the caldera on 5 April at 02:25. For the rest of the country the overall assessment is usual background levels of seismic activity"},{"id":101,"published_at":"2016-04-13T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An M4.2 and M3.5 earthquakes on 8 April at 00:10 and 01:01. An M3.4 earthquake on 12 April at 22.26"}],"additional_notes":"Bardarbunga volcano: An M4.2 earthquake occurred at the northern rim of the Bardarbunga caldera on 8 April at 00:10 and it is the strongest earthquake in Bardarbunga since end of January 2015. The same day another earthquake of magnitude M3.5 occurred at a similar place at 01:01. On 12 April at 22:26 an earthquake of magnitude M3.4 was detected at the southern rim of the caldera Some seismic activity is detected in the outlet glaciers of Myrdalsjokull and south of Vatnajokull ice cap. They are not unusual in the spring time and are probably linked to glacial movements. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":102,"published_at":"2016-04-20T11:00:00Z","entries":[{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquakes of magnitude 3.15 and 3.20 were recorded on April 17th"}],"additional_notes":"Bardarbunga volcano: Seismicity is still ongoing in the area as in previous weeks. However there were no earthquakes in the area recorded this week larger than M3.0. Eldey (Reykjaneshryggur): Seismicity in the area is within normal background levels. Events larger than M3.0 are not uncommon. Some seismic activity is detected in the south of Vatnajokull ice cap (Oraefajokull) and is probably due to glacial movements. This is not unusual for the springtime. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":103,"published_at":"2016-04-27T11:00:00Z","entries":[],"additional_notes":"Bardarbunga volcano: Seismicity is still ongoing in the area as in previous weeks. However there were no earthquakes in the area larger than M3.0. The largest earthquake within the caldera had a magnitude M2.8 on 23 April at 19:54. Some seismic activity is detected in the south of Vatnajokull ice cap (Oraefajokull) and is probably due to glacial movements. This is not unusual for the springtime. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":104,"published_at":"2016-05-04T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 earthquake 01.05.2016 M3.3 earthquake 03.05.2016"}],"additional_notes":"Bardarbunga volcano: Seismicity is still ongoing in the area as in previous weeks. There were two earthquakes in the caldera larger than M3.0. The largest earthquake had a magnitude M3.4 on 1st of May at 19:26. Some seismic activity is detected in the south of Vatnajokull ice cap (e.g. Oraefajokull) and is likely due to glacial movements. This is not unusual for the springtime. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":105,"published_at":"2016-05-11T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 and M3.2 earthquakes on 06.05.2016"}],"additional_notes":"Bárðarbunga:\nTwo earthquakes of magnitude Mw>3 occurred on the southern caldera rim of Bárðarbunga volcano on 6. May 2016, Mw3.3 at 19:50 and Mw3.2 at 19:51. A total of around 25 earthquakes was detected in the caldera region during the week, around 15 events were observed in the dyke intrusion (all smaller than Mw1.7). A meeting on the general assessment of the activity in Bárðarbunga with representatives of the Icelandic Met Office, the University of Iceland and the Icelandic Civil Defence took place on Monday 09. May. The main points raised at the meeting were: Seismic energy release has been increasing inside the Bárðarbunga caldera since September 2015. GPS measurements are consistent with increased pressure below the caldera at ~12km depth. Satellite images show slight increased geothermal activity on the caldera rim. Joint interpretation of the current measurements suggest that new magma is being accumulated in a magma chamber at 12 km depth below Bárðarbunga caldera. More data is needed to constrain the current activity better and the monitoring teams are planning a quick response to that need. The 24/7 monitoring at IMO is following closely the current activity in the area."},{"id":106,"published_at":"2016-05-18T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 earthquake on 12 May at 10:11, 2016."}],"additional_notes":"Bárðarbunga:\nOne earthquake of magnitude M3.2 occurred on the northern caldera rim of Bárðarbunga volcano on 12 May at 10:11. A total of around 35 earthquakes were detected in the caldera region. Around 25 events were observed in the dyke intrusion and all of them had magnitudes less than 1.1. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":107,"published_at":"2016-05-25T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.4 earthquake on 20 May, three M>3 earthquakes in addition"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.1 ~140 km SW of Eldey"}],"additional_notes":"Bárðarbunga:\nAn earthquake of magnitude Mw4.4 occurred on the northeastern caldera rim of Bárðarbunga on 20. May at 07:11. It was the strongest earthquake detected in Bárðarbunga since the end of the fissure eruption in Holuhraun end of February 2015. The event was preceeded by a M3.3 earthquake at 07:11 (around 20 seconds before) and followed by around 10 aftershocks, the strongest of which was as well M3.3 at 07:17. A media release on the recent activity in Bárðarbunga was sent out by IMO the same day: http://en.vedur.is/about-imo/news/on-the-bardarbunga-earthquakes Another M3.4 earthquake occurred on the southern caldera rim on 23. May at 17:37. All together around 40 events were detected around the caldera during the week. 12 events were detected in the dyke, all of them below M1.5.\nEldey:\nA M4.1 earthquake occurred on the Reykjanes ridge around 140 km southwest of Eldey island on 21. May at 20:41. A M3.0 event followed at 20:42. Earthquakes of that magnitude are not uncommon on the Reykjanes ridge. They usually occur within earthquake swarms and it is well possible that smaller events within a potential swarm in this area were not detected due to the distance to the onshore network."},{"id":108,"published_at":"2016-06-01T12:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquakes larger than M3. Have been detected in the last week."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"One deep (18 km) event on May 28th, M1.0"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"One deep event (16 km) in Mýrdalsjökull (East side of the caldera rim), on May 30th"}],"additional_notes":"Bárðarbunga:\nAn earthquake of magnitude M3.4 occurred on the southern caldera rim of Bárðarbunga on May 31st at 12:24. A M3.1 earthquake occurred on June 1st inside the northwestern caldera rim at 08:44. A M3.3 earthquake occurred on May 26th at 15:17. This activity is normal compared with the last weeks. Arnardalsalda (About 60 km NNE of Kverkfjöll): There has been 15-20 earthquakes in the Arnardalsalda area, on May 30th and 31st. Most of them are shallow events, with a few deeper. The seismicity in this area is not common, but not unusual either (similar activity was observed in 2006 and 2012). These area belong to the Kverkfjöll system. The overall assessment of the activity over the country is within the known background level."},{"id":109,"published_at":"2016-06-08T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Deep small cluster on the 7th of June"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes larger than M3. Have been detected in the last week."}],"additional_notes":"Bárðarbunga:\nOn the 5th of June an earthquakes of magnitude 3.4 occurred on the southern caldera rim of Bárðabunga. A M3.1 occurred on the 1st of June in the northern rim of the caldera. This activity looks to be normal compared with the last weeks.\nAskja:\nSeven deep earthquakes were recorded on the 7th of June, north of Öskjuvatn. All around 16-17 km depth. Deep seismicity in the area is not unusual. The overall assessment of the activity over the country is within the known background level."},{"id":110,"published_at":"2016-06-15T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes larger than M3. Have been detected in the last week."}],"additional_notes":"Bárðarbunga:\nOn the 12th of June two earthquakes occurred in Bardarbunga. One was of magnitude M3.1 and the other one of M3.6. The overall assessment of the activity over the country is within the known background level."},{"id":111,"published_at":"2016-06-22T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Rather quiet, no earthquakes M>3"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 SW of Eldey on 15. June"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.0 on 21.06., increased conductivity in Múlakvísl"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm W of Krýsuvík"}],"additional_notes":"Bárðarbunga:\nRather low activity compared to recent weeks. All in all around 35 earthquakes have been detected around the Bárðarbunga caldera, the strongest was M2.9 on 17. June. Around a dozen events were detected in the dyke intrusion, none of them larger than M1.5.\nEldey:\nA M3.3 earthquake occurred about 25 km SW of Eldey on 15. June, followed by a few aftershocks.\nKatla:\nA M3.0 earthquake occurred in the Katla caldera on 21. June, preceded by a M2.2 and a M2.7 during the days before. At the same time, electric conductivity has been increasing in the glacial outlet river Múlakvísl SE of Katla. Conductivity is still below the alert threshold and presently stable or slightly decreasing. One of the hydrothermal cauldrons underneath the glacier seems to be leaking. This is quite common at this time of the year and often goes along with increased seismic activity.\nKrýsuvík:\nA small earthquake swarm started W of Krýsuvík yesterday 21. June and continued throughout last night. Events align along the volcanic fissures in the western part of the system. A total of around 50 events has been detected so far, the strongest was M2.2. Such sequences are common on the Reykjanes peninsula and most likely reflect tectonic movements rather than volcanic activity."},{"id":112,"published_at":"2016-06-29T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Five earthquakes M>3, largest being M4.0"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Decreasing conductivity in Múlakvísl"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 recorded"}],"additional_notes":"Bárðarbunga:\nAround 60 earthquakes were detected in Bárðarbunga. Five of those earthquakes were >3.0. On 25th of June there was an earthquake of magnitude 3.5 at 07:19. The largest earthquake was a M4.0, detected at 13:17 on the 25th of june as well. Smaller earthquakes followed, a 3.2 at 13:18 and a 3.9 at 13:45. The following day, 26th of June, there was an earthquake of M3.2 at 18:19. Overall, no significant changes to report in relation to Bárðarbunga but the area is being closely monitored, as in previous months.\nTorfajökull:\nAn earthquake of magnitude 3.2 was recorded on the northwestern side of the Torfajökull caldera. This earthquake was felt locally. Earthquakes of similar size occur every few years. There are no indications of volcanic unrest in Torfajökull.\nKatla:\nThe minor outburst flood reported last week has almost subsided. Conductivity levels are returning to normal. No significant earthquake activity has occurred in Katla."},{"id":113,"published_at":"2016-07-06T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity levels during the last seven days are lower than in recent weeks (see comments). Loki Ridge: One M3.4 earthquake detected (see comments)"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Slight increase in earthquake activity (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Slight increase in earthquake activity (see comments)"}],"additional_notes":"Bárðarbunga: Micro-earthquake activity continued at Bárðarbunga, although no earthquakes exceeding magnitude three were detected. Overall, seismicity levels during the last seven days are lower than in recent weeks. There are no other significant observations to report from other monitoring networks. Loki-Fögrufjöll ridge: On 5 July at 05:56 UTC, an M 3.4 earthquake occurred ~17 km east of the Hamarinn volcano in western Vatnajökull, where ice thickness ranges from 500 to 600 m. No aftershocks or seismic tremor accompanied the earthquake. Mýrdalsjökull (Katla): From 30 June to 5 July, slightly elevated levels of seismicity occurred beneath the Mýrdalsjökull ice-cap. All of the 30 located earthquakes were smaller than M 2 in size. Summertime increases in caldera seismicity are common, so the situation is not unusual. Hekla: On a time-scale of weeks, a slight increase in micro-seismicity is apparent at Hekla. However, in comparison to the last three years of seismicity, the increase is not highly anomalous. We continue to monitor Hekla continuously with near-real-time seismic and geodetic measurements."},{"id":114,"published_at":"2016-07-13T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.0 in Bárðarbunga (see comments)"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Media summary about Hekla published (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor outburst flood occurring from an ice cauldron on Mýrdalsjökull (see comments)"}],"additional_notes":"Bárðarbunga: Micro-earthquake activity continued at Bárðarbunga, including one earthquake on July 12th that registered M3.0. Overall, seismicity levels during the last seven days are similar to previous weeks. Mýrdalsjökull (Katla): A small outburst flood is occurring in the Markarfljót glacial river. The flood originates from a geothermal area beneath Entujökull glacier on the northwestern side of Mýrdalsjökull. A strong, localised smell of hydrogen sulphide has been reported from the upper reaches of Markarfljót, close to the Emstrur hiking huts. Such floods occur almost annually and they are usually accompanied by geothermal gases. There's been no significant increase in earthquake activity in Katla since the flood began. Hekla: In response to the slight increase in earthquake activity that was noted last week, IMO has published an update about our monitoring of Hekla: http://en.vedur.is/about-imo/news/monitoring-hekla"},{"id":115,"published_at":"2016-07-20T11:45:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"One M 3.6 earthquake (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Increased seismicity and drainage of geothermal meltwater (see comments)"}],"additional_notes":"Bárðarbunga: On 16 July at 04:53 UTC, an earthquake of magnitude 3.6 occurred in Bárðarbunga on the northern rim of the caldera. Overall, earthquake activity in Bárðarbunga remains at levels similar to previous weeks: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Katla: Increased seismicity in the Katla caldera, as is common during the summertime. An earthquake swarm began on 13 July, lasting until 16 July. Over 80 earthquakes were recorded, the largest of which was magnitude 3.1 at 23:06 UTC on 13 July. Presently, water-level and electrical conductivity measurements at the bridge over Múlakvísl river show increased drainage of geothermal meltwater from Mýrdalsjökull. We continue to monitor Katla closely and will issue updates if the situation changes. For a map showing the previous week's seismicity, see: http://hraun.vedur.is/ja/viku/2016/vika_28/"},{"id":116,"published_at":"2016-07-27T11:40:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Lower seismicity than in recent weeks (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Two M3.2 earthquakes on 26 July (see comments)"}],"additional_notes":"Bárðarbunga: During the past week, earthquake activity at Bárðarbunga has been lower than in recent months, as shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html. Of the recorded earthquakes, the largest magnitude was around 2.2. Katla: Elevated micro-earthquake activity continues to occur in the ice-covered Katla caldera, as reported last week. On 26 July, two magnitude 3.2 earthquakes occurred in the northern part of the caldera, both sourced at shallow depth. The intensity and the pattern of the seismicity within the caldera is similar to summertime unrest observed in 2012 and 2014. At that time, the heightened seismicity occurred in connection with drainage of water from several known ice cauldrons. Since late June 2016 there have been three small floods in Múlakvísl, in addition to a flood from Entujökull. Around Katla there has been no sign of increased ground deformation and no bursts of seismic tremor have been seen. Presently, water-level and electrical conductivity measurements at the bridge over Múlakvísl river show increased drainage of geothermal meltwater from Mýrdalsjökull. We continue to monitor Katla closely and will issue updates if the situation changes. Our assessment is that the volcano is in a typical summertime period of unrest, although we cannot rule-out a sudden escalation in seismicity in connection with a hazardous flood. In other words, the volcano itself seems to be okay but the hydrothermal system seems to be quite active. For an on-line overview of seismicity levels within the caldera, see: http://hraun.vedur.is/ja/Katla/katla_qu.html. For a map showing the previous week's seismicity, see: http://hraun.vedur.is/ja/viku/2016/vika_28/ http://hraun.vedur.is/ja/viku/2016/vika_29/"},{"id":117,"published_at":"2016-08-03T11:40:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Lower seismicity in July compared to previous months (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Lower seismicity in recent days (see comments)"}],"additional_notes":"Bárðarbunga: During July, earthquake activity at Bárðarbunga has been lower than in recent months, as shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html. Of the recorded earthquakes last week the largest magnitude was around 2.3. Katla: Earthquake activity in connection to water drainage of known ice cauldrons in the caldera has been decreasing in this last week. Given the current activity, it appears that the seasonal volcano unrest is coming to an end. We continue to monitor Katla closely and will issue updates if the situation changes. For an on-line overview of seismicity levels within the caldera, see: http://hraun.vedur.is/ja/Katla/katla_qu.html. For a map showing the previous week seismicity, see: http://hraun.vedur.is/ja/viku/2016/vika_30/myr.gif"},{"id":118,"published_at":"2016-08-10T11:50:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity on the caldera rim (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Activity remains low relative to July (see comments)"}],"additional_notes":"Bárðarbunga: During the past week, over twenty earthquakes occurred within the caldera, the largest of which was magnitude four in size. Remarkably regular periods of increased earthquake activity have taken place within the caldera in recent months, as shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html. The regular occurrence of earthquakes could signify progressive release of stresses, associated with slow inflation of the volcano following the 2014 – 2015 eruption at Holuhraun. The overall assessment is that earthquake rates at Bárðarbunga are below those observed in recent weeks. Katla: The seasonal increase in caldera seismicity that was reported in recent weeks seems to have ended. The past week's activity was relatively low, with 30 micro-earthquakes detected within the caldera. For an on-line overview of seismicity levels within the caldera, see: http://hraun.vedur.is/ja/Katla/katla_qu.html."},{"id":119,"published_at":"2016-08-17T10:40:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Very low activity but two deep events SE of caldera (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"A very small earthquake swarm (see comments)"}],"additional_notes":"Bárðarbunga: Seismicity in Bárðarbunga was quite low this week, with only two earthquakes detected in the caldera. Two deep earthquakes (deeper than 15 km) were located southeast of Bárðarbunga caldera. Deep earthquakes such as these are regularly detected in this area and the IMO keeps a close eye on all such activity. Katla: A small swarm of earthquakes was detected on the evening of August 12th. 12 earthquakes were located in the swarm with the largest one being M2.0. Swarms like this are not an unusual occurrence, especially in the summertime. Measurements in nearby rivers do not show any signs of unusual activity in Katla volcano."},{"id":120,"published_at":"2016-08-24T11:55:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Decreased earthquake rate in comparison with the past two months (see comments)"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor outburst flood occurring from the subglacial lake (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Increased caldera seismicity (see comments)"}],"additional_notes":"Bárðarbunga: The largest earthquake since last week's report was a magnitude 3.2 earthquake on 21 August at 01:58 UTC. This earthquake occurred in the southern part of the caldera. Overall, the level of earthquake activity at Bárðarbunga, in terms of weekly earthquake rate, is lower this week than in recent months. Grímsvötn: A minor outburst flood (jökulhlaup) is occurring from the subglacial lake within the volcano's caldera. Such floods occur every few years, reflecting accumulation of meltwater from geothermal heat and summertime melting of the ice surface. The ongoing jökulhlaup is thought to have begun on 18 August and, according to seismic tremor levels, discharge from the lake appears to be peaking. There is no sign of any volcanic unrest at Grímsvötn. Katla: Seismicity within the caldera remains elevated. Shallow earthquakes cluster in several areas within the caldera; many of these locations are areas of known geothermal activity. The largest earthquake at Katla since last week's report was a magnitude 3.5 event on 19 August. Summertime increases in caldera seismicity are common at Katla, most recently in 2014."},{"id":121,"published_at":"2016-08-31T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 on 28th August M3.8 and M3.4 on 30th August (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Swarm with two M4.5, three M>3 on 29th August (see comments)"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 on 29th August in Svartsengi"}],"additional_notes":"Katla: Significant earthquake swarm on 29th of August between 00:30 and 06:00 with main pulses around 00:40 and 01:50. Two M4.5 events at 01:47 on the northeastern caldera rim and three over M3. All together around 100 earthquakes were detected inside the caldera. This marks one of the largest swarms in recent decades. Increased hydrogen sulphide concentrations were detected around Múlakvísl river. Earthquake activity has decreased significantly since Monday afternoon. Bárðarbunga: M3.4 on 28th of August on the southern caldera rim, M3.8 and M3.4 on 30th of August on the northern rim. All in all around 70 earthquakes in the caldera and around 20 in the dike. Svartsengi (Reykjanes): M3.1 in Svartsengi volcanic system on Reykjanes peninsula on 29th of August, only a few aftershocks have followed. It is likely that this event was located on the tectonic faults of Reykjanes."},{"id":122,"published_at":"2016-09-07T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismic activity ongoing, (see comments)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 on 7th of September (see comments)"}],"additional_notes":"Katla: An earthquake of M3.5 occurred on the 7th of September at 08:58. After the swarm occurred on the 29th of August the earthquake activity within the caldera has been decreasing until this morning, when an earthquake of M3.5 occurred at 08:58. A few aftershocks have been recorded since then, the largest one of M1.5. Through out the week hydrogen sulphide concentrations and conductivity in Múlakvísl river have been decreasing as well. Earthquakes larger than M3.0 are not uncommon in the caldera, up to 7 similar earthquakes have been recorded during this summer time. Bárðarbunga: 60 earthquakes have been recorded during the week. All of them with M<1.1. The activity is not unusual compared to previous months. Else for the whole country the overall assessment is usual background levels of seismic activity."},{"id":123,"published_at":"2016-09-14T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 on 13th September"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 and M3.0 on 11th September"},{"volcano_code":"TUN","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor earthquake swarm on 8th/9th September"}],"additional_notes":"Katla: Two earthquakes of M3.3 and M3.0 were detected on 11th September, the stronger one at 16:12, the second strongest shortly before at 15:57. All together around 60 events have been located in Katla during the week. Bárðarbunga: Around 60 earthquakes were detected during the week, the strongest was M3.3 on 13th September at 08:15. Around 15 events were observed in the dyke intrusion, none of them larger than M1.5. Tungnafellsjökull: A small earthquake swarm of around 40 events was observed on 8th and 9th September. The strongest event was M2.9 on 8th September at 08:41. Such swarms have been previously observed and they are most likely a tectonic response to the processes in the neighbouring Bárðarbunga volcano during the last years. Glacial outburst flood in Skaftá: A small glacial outburst flood occurred in Skaftá river end of last week, originating from the western Skaftá cauldron underneath western Vatnajökull. Such floods represent the release of melt water due to hydrothermal activity under the glacier. They occur frequently every 1-3 years. As the last flood was in 2015, the recent flood was small. Tremor pulses observed after the cauldron had emptied are a common observation. They are linked to hydrothermal flash boiling and not to magmatic activity."},{"id":124,"published_at":"2016-09-21T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Four earthquakes over magnitude 3.0"},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":null,"status_text":"A seismic swarm due to reinjection of wastewater"}],"additional_notes":"Bárðarbunga: Around 90 earthquakes were detected in Bárðarbunga during the week, of which there were four earthquakes over M3.0. An earthquake of M3.3 was detected on 13 September and an earthquake of M3.5 on 15 September. The largest earthquakes were M3.8 M3.7 on the evening of 18 September. Around 20 events were observed in the dyke intrusion, none of them larger than M0.8. Hengill: An earthquake swarm began in Hellisheiði, in the Hengill area, on 17 September. In this area, there is a geothermal power plant and the seismicity is linked to re-injection of wastewater in the area, not magmatic activity. The largest earthquake of the sequence was M3.6 on 18 September at 22:29; it was felt in many places in south Iceland and in the capital. Another earthquake of M3.2 occurred the same day at 23:32 and it was also felt in many places. In total, over 400 earthquakes were measured in the swarm."},{"id":125,"published_at":"2016-09-28T11:30:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.9 eq on 26 Sept. at 13:31 and another M3.2 on 27 Sept. at 13:54."}],"additional_notes":"Bárðarbunga: Around 30 earthquakes were detected in Bárðarbunga and all of them had magnitudes below M2.4. Around 20 events were observed in the dyke intrusion, none of them larger than M0.9. Katla volcano: An earthquake with magnitude M3.9 occurred within the Katla caldera on 26 September at 13:31 and another M3.2 earthquake occurred at the same place on 27 September at 13:54. A continued seismic activity since late August."},{"id":126,"published_at":"2016-10-05T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M2.9 and M3.6 on 05 October at 08:22 and 08:29, respectively"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.7 eq on 30 Sept. at 04:41 and two M3.6 on 30 Sept. at noon."}],"additional_notes":"Bárðarbunga: Around 35 earthquakes were located in Bárðarbungua during the week and the same amount in the dyke by Dyngjujökull. Today (05 October) two earthquakes around magnitude 3 (M2.9 and M3.6) have been recorded in the northern part of the caldera. Such seismicity in not unusual and occurred occasionally in the area in the last months. Katla volcano: Between 29 September and 01 October, an intense seismic swarm, comprising about 500 earthquakes, took place within the ice-covered caldera of Katla. Nine of the earthquakes exceeded magnitude three, with four such earthquakes occurring in quick succession between 12:02 and 12:15 UTC on 30 September. This escalation in seismicity on 30 September prompted IMO to raise the aviation colour-code for Katla to YELLOW. The swarm persisted in the south-east part of the Katla caldera until 01 October. Aside from intense earthquake activity, no pulses of seismic tremor were detected during the unrest. Presently the seismicity level at Katla is low. Additionally, no other geophysical or hydrological changes have been noted from the volcano, both during and since the swarm. From these observations, it is concluded that Katla volcano has returned to normal background levels. The aviation colour-code for Katla was downgraded on 04 October from YELLOW to GREEN. Despite reinstating the GREEN colour-code, Katla remains restless, as revealed by seismicity levels on a weekly and monthly basis (see: http://hraun.vedur.is/ja/Katla/katla_qu.html). Any renewed unrest at Katla will be communicated immediately by IMO via the standard communication channels."},{"id":127,"published_at":"2016-10-12T11:30:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquakes over magnitude 3.0"}],"additional_notes":"Katla volcano: Seismicity in Katla has decreased since last week, but remained above the normal background, with over 70 earthquakes in Mýrdalsjökull glacier this week. Most of the earthquake activity occurred on October 6th, with around 40 earthquakes. Three of these were large earthquakes of magnitude 3.4, 3.2 and 3.1. The largest earthquake was felt in a nearby town, Vík."},{"id":128,"published_at":"2016-10-19T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes of magnitude 3.5"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See comments"}],"additional_notes":"Bárðarbunga: Two earthquakes of magnitude 3.5 were recorded on the 15th of October at 03:20 and 04:01 in the northern rim of the caldera. Katla volcano: Seismicity in Katla has been similar to the week before, About 60 earthquakes were recorded in the Katla caldera, the biggest one of magnitude 2.7 recorded on the 15th of October. There was a little increase in seismicity on Saturday (15th of October) and Monday (17th of October), but decreased again after that. No volcanic tremor has been observed during this period of unrest in Katla Else for the whole country the overall assessment is usual background levels of seismic activity."},{"id":129,"published_at":"2016-10-26T11:30:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See comments"}],"additional_notes":"Bárðarbunga volcano: Around 10 earthquakes within the caldera and all of them less than magnitude 1.5. Katla volcano: Seismicity within the Katla caldera has decreased. About 30 earthquakes were recorded in the Katla caldera, the biggest one of magnitude 2.9 recorded on 23 October. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":130,"published_at":"2016-11-02T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 and M3.3 earthquakes on 27 October at 02:08 and 02:09"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See comments"}],"additional_notes":"Bárðarbunga volcano: Two M3.5 and M3.3 earthquakes in the caldera on 27 October at 02:08 and 02:09. Around 20 earthquakes were detected at the Bardarbunga volcano. Katla volcano: Seismicity within the Katla caldera is decreasing. About 12 earthquakes were recorded in the Katla caldera, the biggest one of magnitude 1.5 recorded on 26 October at 16:20. Around 20 earthquakes were detected west of the caldera, below the western part of Myrdalsjökull ice cap which is often active during the autumn. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":131,"published_at":"2016-11-09T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 earthquake on 5 November at 12:51"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See comments"}],"additional_notes":"Bárðarbunga volcano: One M3.1 earthquake within the caldera on 5 November at 12:51. Around 25 earthquakes were detected at the Bardarbunga volcano. Katla volcano: About 27 earthquakes were recorded in the Katla caldera, the biggest one of magnitude M2.3 recorded on 5 November at 11:41. Around 19 earthquakes were detected west of the caldera, below the western part of Myrdalsjökull ice cap which is often active during the autumn. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":132,"published_at":"2016-11-16T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 earthquake on 11 November at 17:20"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See comments"}],"additional_notes":"Bárðarbunga volcano: One M3.5 earthquake within the caldera on 11 November at 17:20. Around 30 earthquakes were detected at the Bardarbunga volcano. Katla volcano: About 35 earthquakes were recorded in the Katla caldera, the biggest one of magnitude M2.8 recorded on 12 November at 06:48. Around 10 earthquakes were detected west of the caldera, below the western part of Myrdalsjökull ice cap which is often active during the autumn. For the rest of the country the overall assessment is usual background levels of seismic activity."},{"id":133,"published_at":"2016-11-23T12:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Short-lived seismic swarm that included an M4 earthquake. See comments, below."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Elevated seismicity, including an M3 earthquake. See comments, below."}],"additional_notes":"Bárðarbunga volcano: On 18 November, an earthquake swarm began beneath the caldera of Bárðarbunga, lasting until late on the following day. The swarm comprised over 20 earthquakes, six of which exceeded magnitude three in size, including the largest event of magnitude four. The swarm was similar in character to previous episodes of increased seismicity since the end of the Holuhraun eruption in late February 2015. For the reporting period, a total of 50 earthquakes were detected in Bárðarbunga, which is similar to levels registered in recent months. Katla volcano: Between 18 and 20 November, increased micro-seismicity was observed in the Katla caldera. Activity was concentrated west of the caldera centre at the head of the Sólheimajökull valley glacier. Earthquakes also clustered in the northern part of the caldera, where a magntitude three earthquake occurred on 20 November. Seismicity levels at Katla have since reduced to below background levels. Elsewhere in Iceland, seismicity locations and levels are consistent with long-term background conditions."},{"id":134,"published_at":"2016-11-30T12:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"A swarm with M3.8 earthquake"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 earthquake"}],"additional_notes":"Bárðarbunga volcano: On 26th of November at 06:33 there was an earthquake of magnitude 3.2 in the northeast rim of Bárðarbunga caldera. Following this earthquake was a small swarm and aftershocks of M2.8 and M2.9. Around 40 earthquakes were detected near Bárðarbunga this week. Katla volcano: About 50 earthquakes were detected in the caldera of Katla volcano this week with only one of them being over magnitude 3.0, which was a M3.2 in the northern rim of the caldera on the evening of Tuesday the 29th of November. Activity is still clustering in the west of the caldera centre at the head of the Sólheimajökull valley glacier and in the northern part of the caldera. Elsewhere in Iceland, seismicity locations and levels are consistent with long-term background conditions."},{"id":135,"published_at":"2016-12-07T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga volcano: Around 25 earthquakes were detected at the Bárðarbunga volcano. The largest earthquake had a magnitude M2.4 on 6 December at 21:50. Katla volcano: About 35 earthquakes were detected in the caldera, mainly in the northern part of it and the largest earthquake had a magnitude M2.6 on 4 December at 01:08. Around 10 earthquakes were detected west of the caldera with largest earthquake M2.5 on 2 December at 09:47. Elsewhere in Iceland, seismicity locations and levels are consistent with long-term background conditions."},{"id":136,"published_at":"2016-12-14T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.2, M3.9 and M3.8 occurred on the 12th of December"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga volcano: Around 50 earthquakes were recorded in Bárðarbugna this week. Three earthquakes larger than M3.5 were located on the 12th of December between 04:00 and 04:30. The largest earthquake M4.2 at 04:29. No volcanic tremor was seen. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.5 have been happening periodically since then. Katla volcano: 16 earthquakes were located in the Katla caldera, the largest earthquake of M2.2 on the 7th of December. Activity is considered as within normal background conditions. Elsewhere in Iceland, seismicity locations and levels are consistent with long-term background conditions."},{"id":137,"published_at":"2016-12-21T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 and M3.0 occurred on the 20th of December"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 and M3.3 on the 14th and 17th, respectively"}],"additional_notes":"Bárðarbunga volcano: Over 20 earthquakes were recorded in Bárðarbunga this week. Two earthquakes were larger than M3.0. A 3.1 and a 3.0 on the 20th of December at 9:36 and 9:37. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.5 have been happening periodically since then. Katla volcano: Around 50 earthquakes were located in the Katla caldera this week, with two large earthquakes of of M3.4 and M3.3 on the 14th and 17th of December, respectively. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":138,"published_at":"2016-12-28T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 on 26 December"}],"additional_notes":"Bárðarbunga volcano: Roughly 35 earthquakes were recorded in Bárðarbunga this week. Largest earthquake was recorded on 22 December of M2.5. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.5 have been happening periodically since then. Katla volcano: Around 40 earthquakes were located in the Katla caldera this week, with the largest earthquake M3.3 recorded on 26 December at 19:08. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":139,"published_at":"2017-01-04T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two M3.6 and M3.3 earthquakes on 31 December 2016"}],"additional_notes":"Bárðarbunga volcano: Around 30 earthquakes were recorded in Bárðarbunga caldera since the last report. Two M3.6 and M3.3 earthquakes occurred at the northern rim of the caldera on 31 December 2016 at 17:46 and 17:35. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.5 have been happening periodically since then. Katla volcano: Around 25 earthquakes were located in the Katla caldera since the last report, mainly in the northeast part of the caldera. The largest earthquake t had a magnitude M2.8 on 30 December at 00:27. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months. Elsewhere there are no signs of volcanic unrest."},{"id":140,"published_at":"2017-01-11T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquakes of M3.7, M3.5 and M3.3"},{"volcano_code":"KRA","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes of M3.5 and M3.0"}],"additional_notes":"Bárðarbunga volcano: Around 40 earthquakes were detected in Bárðarbunga caldera since the last report with three earthquakes above M3.0. The largest was a M3.7 on the 4th of January and then we had a M3.5 on the 8th of January and a M3.3 on the 6th of January. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.5 have been happening periodically since then. Katla volcano: Around 30 earthquakes were located in Katla caldera since the last report with two of them being of M3.0 or higher. Those earthquakes were a M3.5 on the 5th of January and a M3.0 on the 7th of January. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":141,"published_at":"2017-01-18T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"One earthquakes of M3.0"}],"additional_notes":"Bárðarbunga volcano: Around 20 earthquakes were detected in Bárðarbunga caldera since the last report and around 10 earthquakes were located in the dyke. The largest earthquake recorded this week was of M3.0 and occurred in the Bárðarbunga caldera on the 12th of January at 23:58. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Minor activity within the Katla Caldera. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":142,"published_at":"2017-01-25T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquakes, M3.5, M3.9 and M3.1 on respectively 19, 23 and 24 January"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes, M3.3 and M3.1 on 23 and 24 January"}],"additional_notes":"Bárðarbunga volcano: Around 30 earthquakes were detected in Bárðarbunga caldera since the last report and around 15 earthquakes were located in the dyke. The largest earthquake had magnitude M3.9 and occurred at the southern rim of the caldera on 23 January at 09:37. Two M3.5 and M3.1 earthquakes were recorded at the northern rim of the caldera on 19 January at 18:03 and on 24 January at 20:18 respectively. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 115 earthquakes were detected within the Katla caldera. The seismic activity intensified during 22 and 23 of January but with no sign of meltwater drainage. Two M3.3 and M3.1 earthquakes were detected within the caldera on 23 January at 18:14 and on 24 January at 11:13. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":143,"published_at":"2017-02-01T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquakes, M4.3, M4.1 and M3.4 on 30 January"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes, M4.3 and M3.0 on 26 January"}],"additional_notes":"Bárðarbunga volcano: Around 20 earthquakes were located in Bárðarbunga caldera since the last report and around 5 earthquakes in the dyke. The largest earthquakes were of magnitude 4.3, 4.1 and 3.4 and occurred by the northern rim of the caldera in a swarm that occurred midday on 30 January. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Over 40 earthquakes were detected within the Katla caldera. There was a seismic swarm on the 26th of January with two large earthquakes, one M4.3 and the other M3.0. There was no sign of meltwater drainage. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":144,"published_at":"2017-02-08T11:00:00Z","entries":[],"additional_notes":"Bárðarbunga volcano: Only around 6 earthquakes were detected in Bárðarbunga caldera since the last report and around 5 earthquakes in the dyke. The largest earthquakes within the caldera had magnitudes around 2. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 40 earthquakes were detected within the Katla caldera. All of them had magnitudes less than 2. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":145,"published_at":"2017-02-15T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"A M3.6 and M3.5"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Five earthquakes around M3.0"}],"additional_notes":"Eldey volcano: An earthquake swarm occurred on 12 February by Eldey volcano, located around 25 km off the southwest coast of Iceland. In this swarm there were four earthquakes over M3.0, two M3.2 and two M3.1. Since the swarm the area has been relatively quiet, except for a M3.0 on 14 February. Swarms like this are relatively common in this area. Bárðarbunga volcano: Around 15 earthquakes were detected in Bárðarbunga caldera and around 5 earthquakes in the dyke. Two large earthquakes were detected in the caldera this week, a M3.5 in the southern part of the caldera on 11 February and M3.6 in the northern part of the caldera on 12 February. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Katla seismicity continues to decrease. Around 20 earthquakes were detected within the Katla caldera. All of them had magnitudes less than 2. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":146,"published_at":"2017-02-22T11:00:00Z","entries":[],"additional_notes":"Bárðarbunga volcano: Just around 3 earthquakes were detected within the Bárðarbunga caldera and around 6 earthquakes in the dyke. The largest earthquake within the caldera had a magnitude M1.5. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 70 earthquakes were detected within the Katla caldera. The largest earthquake had a magnitude M2.8 on 21 February at 09:03. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":147,"published_at":"2017-03-01T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Six earthquakes with M>3.0. The largest of M4.1 at 8:57 1st of March"}],"additional_notes":"Bárðarbunga volcano: Six earthquakes were detected in Bárðarbunga with magnitude larger than 3.0 this week. All of these earthquakes were located in the northern rim of the Bárðarbunga caldera. Today, 1st of March at 8:57 there was a small swarm within the caldera. The largest was was of magnitude 4.1 at 8:57. Five earthquakes were detected afterwards, one of M3.5, two of M3.4 and one of M3.0 between 9:13 and 9:45. These is no sign of volcanic tremor with this activity. One earthquake of M3.0 was detected on the 25th of March. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 50 earthquakes were detected within the Katla caldera this week. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":148,"published_at":"2017-03-08T10:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquakes above M3.0."}],"additional_notes":"Bárðarbunga volcano: A seismic swarm occurred in Bárðarbunga on March 8th at around 3:50am with three earthquakes over M3.0 and about 10 earthquakes in total. All of these earthquakes were located in the southern part of the caldera centre. The largest earthquake of the swarm was of M4.0 with the second and third largest being M3.9 and M3.3. Since this swarm occurred so recently, there might be more smaller earthquakes in the swarm that have not yet been located. There were about 40 earthquakes in total in Bárðarbunga this week. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 35 earthquakes were detected within the Katla caldera this week. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":149,"published_at":"2017-03-15T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"One earthquake of M3.7"}],"additional_notes":"Bárðarbunga volcano: On the 13th of march at 02:40 an earthquake of M3.7 occurred in the northern rim of the Bárðarbunga caldera. A few aftershocks were recorded, none with magninture above 2.0. There were about 33 earthquakes in total in Bárðarbunga this week. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 35 earthquakes were detected within the Katla caldera this week. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":150,"published_at":"2017-03-22T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"One earthquake of M3.7 and one earthquake of M3.1"}],"additional_notes":"Bárðarbunga volcano: On the 16th of march an earthquake of M3.6 occurred in the southern part of the Bárðarbunga caldera 21st of march at 17:49 an earthquake of M3.1 occurred in the northern rim of the Bárðarbunga caldera. There were about 69 earthquakes in total in Bárðarbunga this week. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 35 earthquakes were detected within the Katla caldera this week. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months."},{"id":151,"published_at":"2017-03-29T11:00:00Z","entries":[],"additional_notes":"Bárðarbunga volcano: Two earthquakes larger than M3.0 were recorded March 21st. There were about 69 earthquakes in total in Bárðarbunga this week. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 40 earthquakes were detected within the Katla caldera this week. Overall the seismicity is decreasing. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months. Herðubreið (Askja) volcano: The swarm started on March 13th and has been decreasing. 150 earthquakes were recorded last week."},{"id":152,"published_at":"2017-04-05T11:00:00Z","entries":[],"additional_notes":"Bárðarbunga volcano: The largest earthquake in the caldera had a magnitude 2.4 on 4 April at 16:27. In total there were around 50 earthquakes detected within the caldera and a around 15 with magnitude larger than 1. The activity was similar as the week before. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 30 earthquakes were detected within the Katla caldera this week. Overall the seismicity is slowly decreasing. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. Looking back to recent years, activity hasn't been this high since 2011. However, this week isn't showing anything out of the ordinary when comparing to recent months. Herðubreið (Askja) volcano: The swarm that started on March 13th has almost finished."},{"id":153,"published_at":"2017-04-12T11:15:00Z","entries":[],"additional_notes":"Bárðarbunga volcano: The largest earthquake within the caldera had a magnitude of Mlw 4.1 on 6 April at 15:08. In total there were around 40 earthquakes detected within the caldera, of these 16 had magnitude larger than Mlw 1. No significant changes were observed compared to recent weeks. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred a month ago, on 8 March. Katla volcano: Around 39 earthquakes were detected within the Katla caldera this week. Similar rate as last week. Only one event reached magnitude 2. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since january 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable but the seismic rate has been slowly decreasing again and seems now similar to previous rates (2012-2016)."},{"id":154,"published_at":"2017-04-19T11:15:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.2 on the 17th of April followed by a small swarm."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 and M3.0 on the 19th of April followed by a small swarm."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"See the additional notes"}],"additional_notes":"Bárðarbunga volcano: On the 17th of April at 11:58 an earthquake of M4.2 occurred, followed by a seismic swarm. In total there were around 40 earthquakes recorded within Bárðarbunga caldera in the week. No significant changes were observed compared to recent weeks. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred a month ago, on 8 March. Katla volcano: A M3.1 and a M3.0 earthquakes were recorded this morning (19th of April) and followed by a small swarm of 20 shallow earthquakes. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable but the seismic rate has been slowly decreasing again and seems now similar to previous rates (2012-2016). Öræfajökull volcano: A slight increase in the seismic activity for the past months at Öræfajökull should be mentioned. Three earthquakes larger than M2.5 have been recorded in the last five months, slightly more than the normal rate for this size of events. The last larger earthquake was detected on the 11th of April and it was of M2.9."},{"id":155,"published_at":"2017-04-26T11:25:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 on the 24th of April followed by a small swarm."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.3 20 km SW of Eldey on the 19th of April (felt)"}],"additional_notes":"Bárðarbunga volcano: The largest event at the Bárðarbunga caldera during the week occurred at 19:02 on 24th of April, M3.3. In total there were around 25 earthquakes recorded within Bárðarbunga caldera during the week. No significant changes were observed compared to recent weeks. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred on 17th of April (Mlw 4.2) Katla volcano: No events that have been manually checked so far reached above M2. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable but the seismic rate seems to be slowly decreasing again. Reykjaneshryggur: A Mlw4.3 event occurred at 12:34 on 19th of April approx. 36 km SW of Reykjanes Peninsula. The event was felt in the town of Keflavík and Reykjavík."},{"id":156,"published_at":"2017-05-03T11:25:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"A M3.3 on the 28th of April and M3.6 on the 1st of May"}],"additional_notes":"Bárðarbunga volcano: The largest event at the Bárðarbunga caldera during the week occurred at 18:11 on the 1st of May, M3.6. In total there were around 40 earthquakes recorded within Bárðarbunga caldera during the week. No significant changes were observed compared to recent weeks. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred on 17th of April (Mlw 4.2) Katla volcano: About 30 earthquakes were recorded in the week. only one event reached above M2. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable but the seismic rate seems to be slowly decreasing again."},{"id":157,"published_at":"2017-05-10T10:40:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"A M3.2 on the 6h of May"}],"additional_notes":"Bárðarbunga volcano: Around 40 earthquakes were located in the Bárðarbunga caldera this wekk. On the 6th of May an earthquake of M3.2 occurred in the northern rim of the caldera. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred on 17th of April (Mlw 4.2) Katla volcano: About 40 earthquakes were recorded in the week. All events below M2. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable but the seismic rate seems to be slowly decreasing again."},{"id":158,"published_at":"2017-05-17T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"A M3.5 on the 14h of May"}],"additional_notes":""},{"id":159,"published_at":"2017-05-24T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.8, M3.9 and M3.2 on the 20th of May"}],"additional_notes":"Bárðarbunga volcano: Around 50 earthquakes were located within the Bárðarbunga caldera this week, which is rather more than the usual number of 30-40 events/week reported for the last weeks. The seismicity peaked on the 20th of May, during which the largest events of the week occurred at the northern caldera rim; these were of magnitudes Mlw 3.2, Mlw 3.8 and Mlw 3.9. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred more than a month ago, on 17th of April (Mlw 4.2). Katla volcano: Nearly 20 earthquakes were located within the caldera during the week, all with Mlw<2, except for one M2.9 event on May 22nd in the central caldera. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable but the seismic rate seems to be slowly decreasing again."},{"id":160,"published_at":"2017-05-31T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.9 on the 27th of May"}],"additional_notes":"Bárðarbunga volcano: Just over 20 earthquakes were located within the Bárðarbunga caldera this week, which is less than last week. One earthquake M3,9 was detected on the 27th of May in the southern rim of the caldera. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred more than a month ago, on 17th of April (Mlw 4.2). Katla volcano: Around 20 earthquakes were located within the caldera during the week, all with Mlw<2. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable but the seismic rate seems to be slowly decreasing again."},{"id":161,"published_at":"2017-06-07T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.7 and two M3,2 on 1st June"}],"additional_notes":"Bárðarbunga volcano: 20 earthquakes were located within the Bárðarbunga caldera this week, which is the same as last week. A small earthquake swarm was detected in the northern caldera on 1st of June with one M3.7 earthquake and two M3.2 earthquakes followed by a few smaller events. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred more than a month ago, on 17th of April (Mlw 4.2). Katla volcano: Around 25 earthquakes were located within the caldera during the week, all with Mlw<2.1. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable but the seismic rate seems to be slowly decreasing again."},{"id":162,"published_at":"2017-06-14T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"One deep >M3 along the caldera rim on June 6th"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"M>3 offshore June 10th"}],"additional_notes":"Bárðarbunga volcano: 30 earthquakes were located within the Bárðarbunga caldera this week, which is 10 more than last week. 35 earthquakes were located in the dyke. The largest earthquake was M2,5 within the caldera. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred more than a month ago, on 17th of April (Mlw 4.2). Katla volcano: Around 40 earthquakes were located within the caldera during the week. The largest one M2,4. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable but the seismic rate seems to be slowly decreasing again. Öræfajökull volcano: One M>2 on June 13th. Overall increase in the activity (eqs M>1.2) since mid-2016."},{"id":163,"published_at":"2017-06-21T11:50:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"One deep earthquake >M3 along the caldera rim on June 21th"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Last evening, on June 20th at around 18:51, a seismic swarm was detected in the eastern side of Katla caldera. The largest earthquake was of M3.6 at 18:52. No other earthquakes over M3.0 were in this swarm, but more than 10 earthquakes were measured in total."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes larger than M2.0 (M2.5 and M2.2) in Öræfajökull on June 16th and 19th, respectively"}],"additional_notes":"Bárðarbunga volcano: In last week 26 earthquakes were detected in Bárðarbunga, the largest was M3.0 at 6:36 am this morning (June 21st). Followed by two smaller events – less than M3.0. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Last M~4 event at Bárðarbunga occurred more than a month ago, on 17th of April (Mlw 4.2). Katla volcano: Around 50 earthquakes were located within the caldera during the week. The largest one was M3.6 and occurred at shallow level at 18:52 yesterday evening (June 20th). It was the trigger for a seismic swarm in the volcano last night that lasted until midnight. No other earthquakes over M3.0 were in this swarm, but more than 10 earthquakes were measured in total. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable. Öræfajökull volcano: Two earthquakes with M>2 were recorded in the last week. On June 16th the larger M2.5 and one M>2.0 on June 19th. Overall increase in the activity (eqs M>1.2) since mid-2016 as shown at the link http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html."},{"id":164,"published_at":"2017-06-28T14:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"(M3.1 and M3.2 in Bardarbunga on June 21st.)"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 on June 21st."}],"additional_notes":"Bárðarbunga volcano: Around 30 earthquakes were detected in Bárðarbunga last week. An updated magnitude from the earthquakes on June 21st are M3.2 and M3.1. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: Around 120 earthquakes were located within the caldera during the week. The largest one was of magnitude M3.4 on June 21st. At the following link http://hraun.vedur.is/ja/Katla/katla_qu.html you can see a plot showing the seismicity in Katla since January 2011. The increased seismic activity between July 2016 and early year 2017 is noticeable. Öræfajökull volcano: Overall increase in the activity (eqs M>1.2) since mid-2016 as shown at the link http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html."},{"id":165,"published_at":"2017-07-05T13:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"(M3.6 on June 30th plus 3 earthquakes >M3.0)"}],"additional_notes":"Bárðarbunga volcano: There were four earthquakes >M3.0 in Bardarbunga this week with the largest one of M3.6 detected on June 30th. Overall little less than 60 earthquakes were detected around the caldera. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see the seismicity sinse the end of the eruption (March 2015). The seismicity is showing a decreaseing trend over the last few months, despite the long-term trend is not deviating from what observed until now."},{"id":166,"published_at":"2017-07-12T10:30:00Z","entries":[],"additional_notes":""},{"id":167,"published_at":"2017-07-19T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"One earthquake M3.3 on July 15th"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"One earthquake M3.1 on July 14th"}],"additional_notes":"Katla volcano There was one earthquake >M3.0 in Katla this week, it was M3.3 on July 15th at 19:12. Little less than 50 earthquakes were detected in the caldera. At the following link http://hraun.vedur.is/ja/Katla/katla_qu_trends.html you can see the seismicity in Katla since 2011. The seismicity increased last summer, but has been calmer for the last few months with occasional earthquake swarms and earthquakes >M3.0.\nKrýsuvík\nOne earthquake M3.1 occurred 5.0 km NE of Krýsuvík on July 14th at 23:53. The earthquake was felt in the surrounding area. Seven small earthquakes followed in the next few hours. Since the M3.1 earthquake the seismicity has returned to background level."},{"id":168,"published_at":"2017-07-26T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 eq on 21 July and M3.2 eq on 22 July"}],"additional_notes":"Katla volcano Two M3 earthquakes were in the northeastern part of the caldera on 21 July at 21:15 with magnitude M3.1 and on 22 July at 22:18 with magnitude M3.2. About 100 earthquakes were detected in the caldera since last report. At the following link http://hraun.vedur.is/ja/Katla/katla_qu_trends.html you can see the seismicity in Katla since 2011. The seismicity increased last summer, but has been calmer for the last few months with occasional earthquake swarms and earthquakes >M3.0. Reykjanes Peninsula Seismic swarm started this morning on 26 July, near Fagradalsfjall on the Reykjanes Peninsula. Two earthquakes with magnitude M3 have been detected, one at 07:27 and the other at 07:56. The seismic swarm is still ongoing. Around 40 earthquakes have been detected so far."},{"id":169,"published_at":"2017-08-02T11:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"–---"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.5 on July 26th at 22:18 and shortly before a M3.2 occurred at 22:15. Both were felt near the volcano."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes near Fagradalsfjall on July 26th. M3.9 and 4.0. Were felt on Reykjanes and S-Iceland."}],"additional_notes":"Katla volcano: Increased seizmicity in Katla volcano July 26th. Most of the earthquakes were located within the caldera. The largest was M4.5 on July 26th. A glacier outburst flood occurred in the Múlakvísl river on July 29th. A few tremor pulses were detected near the volcano on July 28th. The color code for Katla volcano was temporarily changed to yellow during the weekend. It was turned back to green on Monday, July 31st. Seizmic activity in the volcano has decreased and is back to normal today. The event is similar to the event in July 2011. At the following link http://hraun.vedur.is/ja/Katla/katla_qu_trends.html you can see the seismicity in Katla since 2011. Reykjanes peninsula: The seizmic swarm near Fagradalsfjall has decreased since last week but there are still quite many small earthquakes detected there."},{"id":170,"published_at":"2017-08-09T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"On August 2nd, M3.8 at 11:09 and M4.5 and M3.2 occurred at 11:24."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"High electrical conductivity in the Múlakvísl river for a few days."}],"additional_notes":"Bárðarbunga volcano: On August 2nd, three earthquakes of magnitude M3.2, M3.8 and M4.5 occurred in Bárðarbunga volcano. Around 30 earthquakes were detected in the Bárðarbunga caldera during the week. At the following link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see a plot showing the seismicity in the Bárðarbunga caldera since the end of the eruption. Earthquakes larger than M3.0 have been happening periodically since then. Katla volcano: There were no earthquakes larger than M3.0 detected within the Katla volcano during the week but the river Múlakvísl, draining from the east side of Mýrdalsjökull galcier, had high electrical conductivity for a few days. It is estimated that geothermal water was flowing form one of the cauldrons."},{"id":171,"published_at":"2017-08-16T11:30:00Z","entries":[{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Four small earthquakes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of M3.0"}],"additional_notes":"Hekla volcano: Four shallow earthquakes were detected just southwest of Hekla volcano, this week. The largest was of M1.2 on 11 August. This is higher than the average of 0-2 earthquakes in Hekla per week, but there are no other signs of unrest and we are closely monitoring the area. Katla volcano: Electrical conductivity in Múlakvísl that was mentioned in the previous report has gone down, but is still high for this time of year. An earthquake of M3.0 was detected in Katla volcano on 12 August."},{"id":172,"published_at":"2017-08-23T11:30:00Z","entries":[],"additional_notes":"Katla volcano: About 20 earthquakes within the Katla caldera were recorded, the largest had a magnitude M2.0. The overall activity have been showing a decreasing trend since the last report. Electrical conductivity in Múlakvísl that was mentioned in the previous report has gone down, and is now back to normal level."},{"id":173,"published_at":"2017-08-30T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.2 and M3.8 on 27.08"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.0 on Reykjanes Ridge 24.08."}],"additional_notes":"Bárðarbunga volcano: On 27. august at 01:42 an earthquake magnitude 3.8 occurred in in the southern rim of the Bárðarbunga caldera. Three minutes later a M4.2 followed. No aftershocks followed. Around 30 earthquakes were detected in Bárðarbunga this week, the others all smaller than M2.3. Reykjanes: A M3.0 occurred on Reykjanes Ridge on 24. August in a small swarm. Kolbeinsey Ridge: A M3.1 on 29. August 33 km N of Kolbeinsey."},{"id":174,"published_at":"2017-09-06T11:30:00Z","entries":[],"additional_notes":"The week was calm in Iceland. No events over M3.0 in the volcanic regions."},{"id":175,"published_at":"2017-09-13T11:00:00Z","entries":[],"additional_notes":"Two earthquakes of M>4 (M 4.1 and M 4.5) occurred at Bárðarbunga on 7 September during a small swarm at the norther rim of the caldera (40 events detected)."},{"id":176,"published_at":"2017-09-20T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two M3.9 on sunday 17th."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"A few earthquakes in and around the volcano in the last week."}],"additional_notes":"The week was relatively calm in Iceland, but with two M3.9 earthquakes in Bárðarbunga. The earthquakes were located in the northern rim of the caldera and just under 5km depth. There were only a few after shocks, the largest M2.5. At the link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html you can see that similar earthquakes (and even larger) have been occurring at the volcano several times since the eruption at Holuhraun ended (in February 2015). This current seismic activity probably reveals an accumulation of new magma at depth causing an increase in the pressure in the volcanic system. Additionally large earthquakes (M4 and M5) were already recorded at Bárðarbunga in the last decades well before the eruption in 2014-2015. However the occurrence of similar earthquakes in the past was not related to impending eruptions at Bárðarbunga. Öræfajökull volcano has had a few more earthquakes than usual backround activity, both in and around the volcano. At the link http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html you can see an overview of the seismic activity around the summit of the volcano. The increase in the earthquake number detection might be due to improvement to the monitoring network, movements and dynamic processes occurring within the glacier and/or a real increase in the magma pressure in the deep volcanic system. Additional monitoring data and longer time series of data will allow to understand better the status of Öræfajökull volcano."},{"id":177,"published_at":"2017-09-27T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"A few earthquakes in and around the volcano in the last week."}],"additional_notes":"Bárðarbunga has been quiet in the last week with only about 12 earthquakes. Öræfajökull volcano has had a few more earthquakes than usual backround activity, both in and around the volcano. At the link http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html you can see an overview of the seismic activity around the summit of the volcano. The increase in the earthquake number detection might be due to improvement to the monitoring network, movements and dynamic processes occurring within the glacier and/or a real increase in the magma pressure in the deep volcanic system. There has been excessive rain in the region and possibly it is triggering the increased seismicity. Additional monitoring data and longer time series of data will allow to understand better the status of Öræfajökull volcano."},{"id":178,"published_at":"2017-10-04T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Tremor pulse on the 3rd of October at 4:55"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of M3.4 at 13:52 on the 3rd of October"}],"additional_notes":"Bárðarbunga has been quiet in the last week with only about 12 earthquakes. Katla On the 3rd of October right before 5 o'clock a tremor pulse occured in Katla volcano that lasted about 20 minutes. The pulse had the highest amplitude on the stations on and around Mýrdalsjökull but was also seen on other stations farther away. The biggest amplitude was seen on Austmansbunga sensor by the northern rim of Katla caldera. The tremor is best seen on the highest frequensies (2-4hz) but also visable on lower frequensies around Mýrdalsjökull (1-2hz and 0.5-1hz). Similar tremor pulses have been recorded in the past connected to glacial floods in Múlakvísl. No signs are of glacial outburst other than the conductivity in Múlakvís is unusually high for this time of year. This tremor pulse was most likely due to geothermal heat and boiling in one of the cauldrons located in Mýrdalsjökull (cauldron 9, 13 or 14) after the water had emptied from the cauldron. Activity since has gone back down to the usually background activity. Öræfajökull Over the week the volcano has had a few more earthquakes than usual background activity, both in and around the volcano, for a total of 17 earthquakes. On the 3rd of October at 13:52UTC there was an earthquake of M3.4 followed by few smaller ones. At the link http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html you can see an overview of the seismic activity within and around the caldera that shows the slight increase in the seismic activity over the past 12 years. The M3.4 earthquake is not visible in this plot because it was located outside the caldera rim on the east flank of the volcano edifice. At the link http://hraun.vedur.is/ja/arg/png/oraefajokull_15d.png you can see the last 15 days of sesimicity over a larger area including the entire Öræfajökull volcano, and the M3.4 earthquake is plotted there. The increase in the earthquake number detection might be due to improvement to the monitoring network over the years, movements and dynamic processes occurring within the glacier and/or a real increase in the magma pressure in the deep volcanic system. Additional monitoring data and longer time series of data will allow to understand better the status of Öræfajökull volcano."},{"id":179,"published_at":"2017-10-11T11:00:00Z","entries":[],"additional_notes":"Bárðarbunga Slightly increased activity in Bárðarbunga (compared to last week) with one M3.7 on Oct 5th, however similar level of activity when compared to previous months. Katla Activity at background level. Tremor pulse reported last week has been linked to a small glacial flood. Öræfajökull Activity has decreased and is back to background levels. When looking at long term changes, earthquake activity in Öræfajökull has increased slightly since 2016. We are working on further improving the monitoring in the vicinity of the volcano."},{"id":180,"published_at":"2017-10-18T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 on the 13th of October at 05:18"}],"additional_notes":"Bárðarbunga About 40 earthquakes were located in Bárðarbunga this week with the largest of M3.1 on the 13th of October. Öræfajökull Around 25 earthquakes were located this week, which is more then in the previous weeks. The earthquakes are all quite small and the largest this week of M1.4 on the 15th of October at 08:57. One more seismic station has been added to the network by Öræfajökull which will improve detections and locations of earthquakes in and around the volcano. When looking at long term changes, earthquake activity in Öræfajökull has increased slightly since 2016. We are working on further improving the monitoring in the vicinity of the volcano."},{"id":181,"published_at":"2017-10-25T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"On 24 October M4.1 at 14:18 and M3.4 at 14:54"}],"additional_notes":"Bárðarbunga Earthquakes on 24 October, M4.1 at 14:18 and M3.4 at 14:54 with origins at the southern rim of the caldera. About 20 earthquakes were located in Bárðarbunga caldera and 23 earthquakes in the dyke, northeast of the caldera. The largest earthquake in the dyke had a magnitude M2.4 on 24 October at 04:02. Öræfajökull Around 10 earthquakes were located since last report. The largest earthquake had a magnitude M1.9 on 22 October at 23:43. When looking at long term changes, earthquake activity in Öræfajökull has increased slightly since 2016. We are working on further improving the monitoring in the vicinity of the volcano."},{"id":182,"published_at":"2017-11-01T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"On 26 October M3.9 at 23:02, M3.2 at 23:03 and M4.7 at 23:26. On 27 October M4.7 at 00:16."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Anomalous SO2 concentration detected at the summit."}],"additional_notes":"Bárðarbunga Earthquakes at the northern rim of the Bárðarbunga caldera on 26 October, M3.9 at 23:02, M3.2 at 23:03 and M4.7 at 23:26 and on 27 October M4.7 at 00:16. The two M4.7 earthquakes are the largest eq detected in the caldrea since the eruption ended in late February 2015 as you can see at the link http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html. About 25 earthquakes were located in the Bárðarbunga caldera and 18 earthquakes in the dyke, similar to last week. The largest earthquake in the dyke had a magnitude M0.7 on 26 October at 08:52. Öræfajökull Since last report two more seismic stations have been installed close the volcano which increase our capability in detecting smaller earthquakes. As a result around 46 earthquakes were located this week. The largest earthquake had a magnitude M2.4 on 31 October at 18:50 and about 40 earthquakes had magnitudes below M1. These small earthquakes are not affecting the graph displayed at the link http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html were we can see that earthquake activity in Öræfajökull has increased since 2016. We are working on further improving the monitoring in the vicinity of the volcano. Hekla Gas measurements performed on top of the volcano showed SO2 concentration around 0.5 ppm on the 29 October and possibly also on 30 October. Since this morning these values went back to normal values (0.0). We have not seen any increase in the seismicity in correlation with this unusual geochemical data as shown by the plot http://hraun.vedur.is/ja/hekla/hekla_qu_trends.html. We will investigate further the reason for this unusual detection of SO2 to understand if this might be caused by changes in the deep magmatic source."},{"id":183,"published_at":"2017-11-08T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"On 26 October M3.9 at 23:02, M3.2 at 23:03 and M4.7 at 23:26. On 27 October M4.7 at 00:16."},{"volcano_code":"KVE","vona_color_code":"GREEN","vals_level":null,"status_text":"Odor of geothermal gases observed at the Kverkfjöll hut on November 5th"}],"additional_notes":"Bárðarbunga Erthquake activity at Bárðarbunga was low, events were of magnitude 1.5 or smaller, http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html. Kverkfjöll A warden at the Kverkfjöll hut noticed a rather strong geothermal odor on Sunday, November 5th. The warden has been taking care of the hut for many years and has noticed this kind of odor from the river (Kverká, which joins river Jökulsá á Fjöllum) flowing from beneath the Kverkjökull outlet glacier every now and then, probably in connection with a small and temporary water leakage from the geothermal area. An increase in conductivity was observed in the glacial river Jökulsá á Fjöllum on November 6th and 7th, approximately 43 km downstream. The river both originates from Kverkfjöll and Dyngjujökull outlet glaciers. Comparison of radar images from early last week and yesterday (Nov 7th) shows a small change at the Kverkfjöll geothermal area. The observations at Kverkfjöll indicate that the geothermal water drained from there, rather than from the Bárðarbunga area. Öræfajökull Many small events are dected due to the new seismimeters installed recently. Around 50 earthquakes were located since last report, only one of magnitude 2.0, and a total of eight events of M>=1.2 which is the magnitude threshold for the graph displayed at the link http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. Hekla No SO2 anomaly observed since last week."},{"id":184,"published_at":"2017-11-15T11:00:00Z","entries":[],"additional_notes":"Bárðarbunga Around 30 earthquakes were detected in Bárðarbunga since last report, most events were below magnitude 2 but the largest one was M2,7 on 10th of November. In the last report we discussed about geothermal odor in Kverkfjöll and geothermal water leeking in to the glacial river Jökulsá á Fjöllum. The electrical conductivity measurements in the glacial river are still abnormaly high but it is slowly decreasing with time. It is still not certain where the geothermal water is coming from, but some recent aerial photographs indicate that a water catchment belonging to Bárðarbunga volcanic system is most likely. Whenever possible new field measurements will be done to confirm this. Öræfajökull Many small events are detected due to the new seismometers installed recently in the area. Around 15 earthquakes were located since last report, all of them were below magnitude 2.0. http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html."},{"id":185,"published_at":"2017-11-22T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two M3,9 eartquakes 21st November"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Electrical conductivity in Múlakvísl is unusually high."},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"Similar earthquake activity, increased geothermal activity and strange smell."}],"additional_notes":"Bárðarbunga Around 15 earthquakes were detected in Bárðarbunga since last report, most events were below magnitude 2, but two earthquakes M3,9 were measured at 13:53 and 13:55 UTC 21st of November. The electrical conductivity measurements in the glacial river Jökulsá á Fjöllum (in the plain north of Vatnajökull) are still rather high but has been slowly decreasing with time. Two recent flights over Bárðarbunga allowed to measure the ice-cauldrons changes as well as to take water samples from Jökulsá á Fjöllum area. One ice-cauldron located SE the Bárðarbunga caldera has moved a little to the north and it has been deepening. Steam and stench of sulphur were reported as coming from other two cauldrons located south of the caldera rim. These two cauldrons have been showing this level of activity for several months. The source for this geothermal water release into Jökulsá á Fjöllum is still uncertain, even though the data available so far points toward Bárðarbunga to be the most likely one. Katla: Electrical conductivity measurements in Múlakvísl river, draining from the eastern part of Mýrdalsjökull glacier, have been extremely high over the last week, and it is now slowly decreasing. There was no sign of a jökulhlaup or glacial outburstflood in the river. The water height in the river has been very low in recent days because it has been very cold in the area so not much meltwater has been added to the river. High peaks of H2S gases were measured in the area (up to 8 ppm) and warnings were issued to the people and tourists approaching the area. Öræfajökull: Around 20 small earthquakes were located around the volcano since the last report, all of them below magnitude 2.0. On Thursday 16th November IMO was informed about some strange smell in the area around the volcano. This information was taken in serious consideration because even though smelling geothermal gases in Iceland is very common, it is not for this specific place in the country. On Friday 17th some satellite images (processed by colleagues from the University of Iceland) showed evidences of ice surface deformation occurring in the middle of the caldera. The color code for Öræfajökull was raised to yellow on the Friday evening and a VONA was sent out declaring the unrest phase at Öræfajökull. On Saturday 18th two flights went to observe and investigate the area. As already reported, the seismicity in the area has been showing an increase over the last months (as shown at the links http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate_short.html and http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate.html). Deformation data shows an uplift signal, that is most likely due to glacial retreat, but a magma inflation signal connot be excluded so far. The ice cauldron that was observed during the weekend has probably developed since the 10th of November, as estimated by both areal photographs and radar images. The reports of geothermal smell in the area around Kvíá river were received just before the weekend, but MultiGas instrument has not measured gases around Öræfajökull except for low amount of CO2. It is still unclear the origin of this smell. Hydrological measurements have been done in many rivers and streams draining from the glacier on 18th November. Kvíá river, which drains to the southeast from Öræfajökull glacier, is mixed with 5 to 7% of geothermal water. This geothermal water is most likely coming from underneath the ice cauldron inside the caldera. Geochemical analysis of these water samples do not show evidences of magmatic signature. Interpretation of all the data and the reports collected suggests that geothermal activity has increased inside the caldera of Öræfajökull, causing the new fractures and movements on the faults wich caused enhancing water circulation. Increased magma pressure at depth is the most likely the cause for this unrest. Additional deformation data and data processing is still needed to understand better the signal and arrive to a more conclusive result. Regular measurements of conductivity in the rivers will be done manually over the next days until real-time hydrological stations will be set up. Gas stations will also be installed at Kvíá and Kotá rivers."},{"id":186,"published_at":"2017-11-29T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga After the two large earthquakes (both M3.9 on the 21st Nov) reported last week, the seismicity in the area has been moderate with around 20 earthquakes recorded in Bárðarbunga. This level of activity can be considered within the background condition for this volcano since the event of eruption in February 2015. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html The electrical conductivity in Jókulsá á Fjöllum river (fed by the northern water catchment belonging to the Bárðarbunga volcanic system) is still decreasing with time. Katla: Only 10 earthquakes have been recorded in Katla over the last week, with the largest one of M1.1. The electrical conductivity in Múlakvísl river has been decreasing over the last week and no new events of elevated gas concentration (mainly H2S) has been either reported and measured. Öræfajökull: About 40 earthquakes were located around the volcano since the last report, all of them below magnitude 2.0. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html A flight has been conducted on the 28 of Nov. to check the deepening of the ice-cauldron formed in the middle of the caldera and identified on the 17th of November by satellite images. Radar measurements revealed that the ice deformation has been deepening of 4 meters over a period of 8 days. Electrical conducticity in the river has been measured regularly and the data show a slow increase as a response of a decreasing trend in the water discharge rate. Recent geochemical analysis of water samples confirms no changes in the composition since last week. Data from the deformation analysis are still not conclusive. Interpretation of all the data and the reports collected suggests that the geothermal source beneath Öræfajökull caldera has been constantly active over the past week with no indications of increasing trend or escalation. For the end of this week four real-time hydrological stations will be set up around Öræfajökull and one continuous GPS station will be installed on the southern flank of the volcano."},{"id":187,"published_at":"2017-12-06T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 eq on 3 December at 04:26"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga One M3.2 earthquake occurred in the southeast part of the caldera on 3 December at 04:26. Around 22 earthquakes were detected within the caldera. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: About 135 earthquakes were located around the volcano since the last report. The largest earthquake had a magnitude M2.3 on 5 December at 19:35. About 120 of them have magnitudes below 1.0. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html This is the highest number of earthquakes detcted so far in the Öræfajökull volcano. This increase of detected earthquakes with small magnitudes may be due to very calm weather in the area along with the improved monitoring network around the volcano. Four hydrological stations and 1 continuous GPS station have been installed and are now up and running. Tomorrow (7 December) there will be another scientific advisory board meeting held at Civil Protection Department during which the overall assessment for Öræfajökull will be discussed again."},{"id":188,"published_at":"2017-12-13T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.1 eq on 9 December at 06:19"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga One M3.2 earthquake occurred in the southeast part of the caldera on 3 December at 04:26. Around 22 earthquakes were detected within the caldera. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: About 70 earthquakes were located around the volcano since the last report. Almost all the earthquakes were below magnitude 1.0. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html This is a decrease in earthquake number and magnitude since last week, but earthquake rate still remains high, when compared with the volcano's usualt activity. Tomorrow (14 December) there will be another scientific advisory board meeting held at Civil Protection Department during which the overall assessment for Öræfajökull will be discussed again."},{"id":189,"published_at":"2017-12-20T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 eq on 16 December at 02:41. M 4.1 eq on 20 December at 04:57 and M4.4 at 05:29."},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga On the 16th of December at 02:41 an earthquake of M3.5 occurred in the caldera. On the 20th December at 04:57 an earthquake of M4.1 occurred in the northern rim of the caldera followed by an M4.4 at 05:29 int he same location. Around 33 earthquakes were detected within the caldera. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: Seismic activity in and around the volcano has been decreasing in the past week. Only about 20 earthquakes were located around the volcano in the last week where most earthquakes were below magnitude 1.5. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html This is a decrease in earthquake number and magnitude, but earthquake rate still remains high, when compared with the volcano's usualt activity."},{"id":190,"published_at":"2017-12-26T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.1 eq on 9 December at 06:19"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga Three earthquakes above M3.0 were detected. M4.1 and M4.4 occure at 04:57 and 05:29 respectively in the morning of 20. December. Another M4.1 was also detected at 23:28 in the evening of 23. December. Around 36 earthquakes were detected within the caldera. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: Around 40 earthquakes were located around the volcano since the last report. Most of the earthquakes were below magnitude M1.0 with the largest on magnitude M1.1. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The number of earthquakes and the magnitude is somewhat decreasing from last several weeks, but earthquake rate still remains high, when compared with the volcano's usual activity."},{"id":191,"published_at":"2018-01-03T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga No earthquakes above M3.0 were detected. Around 10 earthquakes were detected within the caldera. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: Around 40 earthquakes were located around the volcano since the last report. All of the earthquakes were below magnitude M1.1. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The number of earthquakes and the magnitude is somewhat decreasing from last several weeks. The color code for Öræfajökull is still yellow but changes there of are under consideration."},{"id":192,"published_at":"2018-01-10T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga: Around 30 earthquakes were detected within the caldera. The largest earthquake had a magnitude M2.9 on 4 January at 01:52. Around 20 earthqukes were detected in the dyke and all of them had magnitudes less than M0.9. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Katla volcano: There was an increase in the seismicity from the beginning of the year until 8th of January 2018 , possibly associated with a small flood that occurred on the 5th and 6th of January in the river Múlakvísl, southeast of the volcano. Öræfajökull: Abaut 20 earthquakes were located at the volcano since the last report. All of the earthquakes were below magnitude M1.0 except one had a magnitude M1.3. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The number of earthquakes and the magnitude is somewhat decreasing from last several weeks. There is still a constant geothermal water release from the caldera into the river Kvíá, southeast of the volcano. The most recent overflight did not reveal further deepening of the cauldron in the middle of the caldera but identified a new area where ice surface deformation is possibly occurring. In light of that the color code for Öræfajökull is still yellow."},{"id":193,"published_at":"2018-01-17T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga: No significant changes were observed since last week. The largest earthquakes occurred at 09:39 and 09:48 on January 15th, magnitudes M3.5 and 3.3. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: Overall decreasing activity. No significant changes observed since last week. Number of detected events was low, only ~10 earthquakes compared to 20 last week, M <= 1. Strong winds probably caused decreased sensitivity of the seismic network (fewer small events detected). The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html Activity is still considered above background and the color code for Öræfajökull is still yellow."},{"id":194,"published_at":"2018-01-24T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga: No significant changes were observed since last week. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: An earthquake of magnitude 3,1 occurred on 18 January in the NE caldera followed by a few aftershocks. Number of detected events 25 earthquakes compared to 10 last week (M <= 1). No other changes were reported. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html Activity is still considered above background and the color code for Öræfajökull is still yellow."},{"id":195,"published_at":"2018-01-31T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquakes on 30 January, M3.7 at 17:48, M3.8 at 18:00 and M4.9 at 19:24"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga: Three earthquakes larger than M3 were detected at the northern rim of the caldera on 30 January, M3.7 at 17:48, M3.8 at 18:00 and M4.9 at 19:24. The M4.9 earthquake is the largest earthquake in the caldera since the eruption in Holuhraun ended in late February 2015. Around 60 earthquakes were detected in the caldera and around 10 in the dyke, northeast of the caldera. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: Around 10 earthquakes were detected and all of them had magnitudes below M0.5. This decrease in the seismicity is not correlated with evident similar trend in other geophysical/geochemical/hydrological parameters. From the last geochemical analysis of the Kvíá river, the geothermal water leakage seemed to be still on-going at similar rate since the beginning of the unrest. Gas release is also still reported in the area (last reported occasion was on the 19th of January). Satellite images and the most recent overfligths have been revealing that the geothermal source is still evolving and that new areas have become active within the caldera (as reported in the VWR on the 10 of January). In the light of these data IMO assesses Öræfajökull to be in unusual conditions above the known background and the yellow color code is maintained. The assessment will be reviewed once we will have new observation from the overflights scheduled beginning next month. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":196,"published_at":"2018-02-07T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga: No significant changes were obserced since last week. About 20 earthquakes were located within the caldera in the week, the largest one of M2.6 on the 5th of February. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: Around 45 earthquakes were detected this week, all of the them had the magnitude below M0.8. Small seismic swarms have been occurring in the caldera since the 5th of February with about 10 earthquakes at a time, all below M1.0. The geothermal water leakage in Kvíá rirver looks to be still on-going at similar rate. Satellite images have been revealing that the geothermal source is still evolving, however at a slower rate than previously reported. An overflight of the area will hopefully be done within the next days, however due to weather conditions this might not be possible until next week. In the light of these data IMO assesses Öræfajökull to be in unusual conditions above the known background and the yellow color code is maintained. The assessment will be reviewed once we will have new observation from the overflights. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":197,"published_at":"2018-02-14T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"M3.6 earthquake on 9 February at 05:07"}],"additional_notes":"Bárðarbunga: One M2.2 earthquake was located within the caldera on 13 February at 02:22. Around 15 earthquakes were detected within the dyke northeast of the caldera and all of them had magnitudes less than M1. The overall seismicity in the area is shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Öræfajökull: On 9 February 2018 at 05:07, an earthquake of magnitude 3.6 occurred within the caldera, just southeast of the ice-cauldron that formed in November last year. This earthquake is the largest earthquake registered in Öræfajökull since seismographs were installed in the area in 1976. Around 10 earthquakes with much smaller magnitudes followed shortly after. Since the last report around 40 earthquakes were detected and 9 of them had magnitudes larger than M1.0. No significant changes have been observed for the past weeks with other monitoring data, including deformation, hydrological and geochemical data available to the Icelandic Meteorological Office. An overflight yesterday did not show significant changes on the surface. The geothermal water leakage in Kvíá rirver looks to be still on-going at similar rate. No significant changes have been seen in the satellite images this year. In light of these data IMO assesses Öræfajökull to be in unusual conditions above the known background and the yellow color code is maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":198,"published_at":"2018-02-21T11:30:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: Only five earthquakes have been located since last report, the largest one M2.5. No significant changes have been observed for the past weeks with other monitoring data, including deformation, hydrological and geochemical data available to the Icelandic Meteorological Office. Since the beginning of this year the seismicity rate has been within the background limit, except for the M3.6 event last week, the largest event recorded in the volcano sofar. Water samples from rivers around Öræfajökull will be analyzed this week, and will give information about possible changes of geothermal content. IMO still assesses Öræfajökull to be in unusual conditions above the known background and the yellow color code is maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":199,"published_at":"2018-02-28T11:30:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: About 30 earthquakes were located this week in Öræfajökull. No significant changes have been observed for the past weeks with other monitoring data, including deformation, hydrological and geochemical data available to the Icelandic Meteorological Office. Since the beginning of this year the seismicity rate has been within the background limit, except for one M3.6 event, the largest event recorded in the volcano so far. Analysis of water samples from rivers around Öræfajökull was delayed but should be finished before the next report, which will give information about possible changes of geothermal content. IMO still assesses Öræfajökull to be in unusual conditions above the known background and the yellow color code is maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":200,"published_at":"2018-03-07T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga: Around 60 earthquakes were detected in the caldera. The largest earthquake had a magnitude M2.8 on 2 March at 09:14 and around 50 earthquakes had magnitudes below M1. Around 30 earthquakes were detected in the dyke northeast of the volcano and all of them had magnitudes below M1. Öræfajökull: Around 40 earthquakes were detected. The largest earthuake had a magnitude M1.8 on 6 March at 17:33 and around 30 earthquakes had magnitudes below M0.5. No significant changes have been observed for the past weeks with other monitoring data, including deformation, hydrological and geochemical data available to the Icelandic Meteorological Office. Analysis of water samples collected on 13 February from rivers around Öræfajökull show no change in composition of geothermal gases. IMO still assesses Öræfajökull to be in unusual conditions above the known background and the yellow color code is maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":201,"published_at":"2018-03-14T11:30:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: Around 70 earthquakes were detected in an around the caldera. The largest earthuake had a magnitude M2.4 on 13th March at 11:42. No significant changes have been observed for the past weeks with other monitoring data, including deformation, hydrological and geochemical data available to the Icelandic Meteorological Office. IMO still assesses Öræfajökull to be in unusual conditions above the known background and the yellow color code is maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":202,"published_at":"2018-03-21T11:30:00Z","entries":[{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"A seismic pulse was detected in Hekla on the 15th of March. 5 earthquakes were located in this pulse with the largest of magnitude M1.2. No other indicators of unrest were measure, including strain and gas measurements."},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: Around 30 earthquakes were detected in an around the caldera. The largest earthuake had a magnitude M1.8 on 19th March at 06:31. In March, based on the graph linked below, it is clear that the over-all seismicity is above the previously established background level. No significant changes have been observed for the past weeks with other monitoring data, including deformation, hydrological and geochemical data available to the Icelandic Meteorological Office. IMO still assesses Öræfajökull to be in unusual conditions above the known background and the yellow color code is maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":203,"published_at":"2018-03-28T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"At 22:56 on the 21st, an earthquake of magnitude 4.3 was detected within the caldera. This was followed by a few smaller ones, the largest of size M2.6. No tremor accompanied this event. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: Around 60 earthquakes were detected within and surrounding the caldera. Largest of these were a M3.0 at 16:32 on the 24th and M2.6 at 14:26 on the 21st. Based on the graph linked below, it is clear that the over-all seismicity is above the previously established background level, both in terms of weekly and monthly activity. Last week, a team went to the glacier and installed new instrument for ground deformation monitoring and a new seismic instrument in the purpose of better constraining the depth of earthquakes. No other evident changes have been observed for the past weeks with other monitoring data, such as deformation, hydrological and geochemical data available to the Icelandic Meteorological Office. IMO still assesses Öræfajökull to be in unusual conditions above the known background and the yellow color code is maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":204,"published_at":"2018-04-04T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 earthquake on 1 April at 13:33"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: Around 25 earthquakes were detected. All of them had magnitudes less than M1 except two that had M1.2. Over the last weeks the seismicity kept to be above the previously established background level. See link below. A Multigas has been installed next to the Kvíá river for few days to investigate the possible presence of SO2, but no SO2 has been detected. The latest water samples collected at the glacial rivers around Öræfajökull have been analysed and they showed no changes compared to previous analysis (i.e. no changes in the amount and the composition of geothermal water). No other evident changes have been observed for the past weeks with other monitoring data, such as deformation and hydrological data available to the Icelandic Meteorological Office. IMO still assesses Öræfajökull to be in unusual conditions above the known background. The yellow color code is currently maintained, but IMO will be considering over the next days the possibility to move it back to green given the low level of hazard represented to the aviation. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html Bárðarbunga: The largest earthquake had a magnitude M3.2 at the northern rim of the caldera on 1 April at 13:33. Around 30 earthquake were detected in the caldera and around 60 in the dyke and all of them were below magnitude M1. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"id":205,"published_at":"2018-04-11T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: Over 100 microearthquakes were detected but all of them had magnitudes of ~M1.5 or smaller. As before their source is mainly located around/beneath the caldera rim. Last week's rate of events M>=1.2 was below the background level but over the last weeks the seismicity kept to be above the previously established background level. See link below. Recent echo soundings made on the ice surface in the caldera (by reasearcher at IES) do not imply any signs of water accumulation at the central cauldron IMO still assesses Öræfajökull to be in unusual conditions above the known background. The yellow color code is currently maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":206,"published_at":"2018-04-18T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: Over 50 micro-earthquakes were detected, which is half the nubmer of last week. All of them had magnitudes of ~M1.2 or smaller. As before their source is mainly located around/beneath the caldera rim. IMO still assesses Öræfajökull to be in unusual conditions above the known background. The yellow color code is currently maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":207,"published_at":"2018-04-25T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: Around 50 micro-earthquakes were detected within Öræfajökull in the past week. The largest was of magnitude M1.5. As before their source is mainly located around/beneath the caldera rim. IMO still assesses Öræfajökull to be in unusual conditions above the known background levels. The yellow color code is currently maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"},{"id":208,"published_at":"2018-05-02T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.9 earthquake on 29 April at 16:13"},{"volcano_code":"ORA","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Öræfajökull: Around 45 micro-earthquakes were detected within Öræfajökull. The largest earthquake had a magnitude M1.1. Around 20 earthquakes had mgnitudes between M0.5-1.0. As before their source is mainly located around/beneath the caldera rim. IMO still assesses Öræfajökull to be in unusual conditions above the known background levels. The yellow color code is currently maintained. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html Bárðarbunga: Earthquake of magnitude M3.9 occurred on 29 April at 16:13 at the northern rim of the caldera. Around 40 earthquakes were deteted."},{"id":209,"published_at":"2018-05-09T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 50 micro-earthquakes were detected within Öræfajökull. The largest earthquake was of magnitude M1.5. The color code has been moved back down to green level. Current status: Since the beginning of the unrest on September 2017 the frequency of earthquake occurrence has been elevated compared to the background level. Over the last months the number of earthquakes detected around Öræfajökull has remained constant, but the associated energy release has been slowly decreasing with time since the end of March. The latest measurement of the cauldron (developed in the middle of the caldera during the first days of November 2017) has been performed on the 23 of March 2018 by the Institute of Earth Science (UI). On that date, dense GPS and radio echo sounding profiles were surveyed over the cauldron. This data showed no signs of significant water accumulation beneath the cauldron and that the cauldron is slowly becoming shallower. Regular measurements of the electrical conductivity at the four main outlet glacial rivers exiting the glacier capping the volcano over the last four months show stable values, fluctuating due to variable amounts of diluting fresh water and glacial sediment. The composition of water samples collected regularly at these rivers, and analysed in a lab at the University of Iceland, indicate the presence of geothermal water (dissolved CO2, chlorine and sulphur) in one outlet river. The composition of the water samples has remained relatively steady since the beginning of the unrest. Campaign GPS and InSAR analysis undertaken using data acquired over the past few years show a deformation signal suggesting inflation at the volcano. More recent InSAR analysis and cGPS data reveal a minor signal in the Southern sector of the volcano edifice corroborating an on-going inflation. Interpretation: Geothermal activity beneath Öræfajökull intensified in fall 2017, and is currently on-going with almost no changes since the beginning of the declared unrest. A slow influx of new magma has probably caused this increase in geothermal activity. Additional data and research are needed to further understand the on-going processes and dynamics behind this reawakening of Öræfajökull volcano. Overall assessment: Öræfajökull is an active volcano and has erupted twice in historical time (1362 and 1727). Since the unrest in September 2017, the monitoring network around the volcano has been improved significantly (with added seismometers, hydrological stations, gas sensors and a new cGPS station) and it is considered now to be more sensitive and capable of detecting changes in the system occurring over a short time window. There is currently no indication of rapid inflow of magma nor other signs of an imminent eruption. Considering the information above, it is assessed that Öræfajökull volcano is currently not posing an imminent hazard to aviation. In light of that the Aviation Color Code is downgraded from Yellow to Green. The overall trend of the seismicity is available at the link : http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":210,"published_at":"2018-05-16T10:40:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"No major changes were observed during the last week. Around 30 micro-earthquakes were detected at Öræfajökull, fewer than last week, the largest earthquake of magnitude M1.5. The Aviation colour code was moved back to green level last week but The Department of Civil Protection and Emergency Management maintains its risc code at uncertainty level."}],"additional_notes":""},{"id":211,"published_at":"2018-05-23T11:20:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes on May 17th, M3.7 and M4.0. No tremor followed."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"4 mico-earthquakes in Hekla all below M0.5. No tremor."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"No major changes were observed during the last week. Around 35 micro-earthquakes were detected at Öræfajökull, fewer than last week, the largest earthquake of magnitude M1.2. The Aviation colour code was moved back to green level last week but The Department of Civil Protection and Emergency Management maintains its risc code at uncertainty level."}],"additional_notes":""},{"id":212,"published_at":"2018-05-30T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"No major changes were observed during the last week. Around 30 micro-earthquakes were detected at Öræfajökull, similar as last week. The largest earthquake had a magnitude M2.1 on 29 May at 12:09 but most of the earthquakes had magnitudes below M1. The Aviation colour code was moved back to green level on 4 May but The Department of Civil Protection and Emergency Management maintains its risc code at uncertainty level."}],"additional_notes":""},{"id":213,"published_at":"2018-06-06T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 30 micro-earthquakes were detected at Öræfajökull, slightly more than last week. All the the earthquakes were of about magnitude 1 and smaller. The Aviation colour code was moved back to green level on 4 May but The Department of Civil Protection and Emergency Management maintains its risc code at uncertainty level."}],"additional_notes":""},{"id":214,"published_at":"2018-06-13T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 6th of June a glacial outburst flood (jokulhlaup) began in Grímsvötn. The flood is still ongoing but has now diminished. This outburst flood is of similar size as floods in previous years. The last one occurred in August 2016. Jokulhlaups occur regularly at Grímsvötn, when geothermal water drains from the volcano's caldera."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 40 earthquakes were detected at Öræfajökull, slightly more than last week. All the the earthquakes were of magnitude 1.5 and smaller. The Department of Civil Protection and Emergency Management still maintains its risc code at uncertainty level."}],"additional_notes":""},{"id":215,"published_at":"2018-06-20T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Five earthquakes larger than M3.0 occurred this week in Bárðarbunga, all on 14. June. The largest was a M4.9 at 15:04, two hours earlier a M4.1 occurred. This is the largest earthquake since the end of the 2014-15 eruption, along with an earthquake of the same size on 30. January 2018. The other three >M3.0 earthquakes were M3.1, M3.3 and M3.5 followed. No tremor was detected and activity has been low since."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 6th of June a glacial outburst flood (jokulhlaup) began in Grímsvötn. The flood peaked at Grímsfjall early on 12. June and in the river Gígjukvísl on 13. June. This outburst flood is of similar size as floods in previous years. The last one occurred in August 2016. Jokulhlaups occur regularly at Grímsvötn, when geothermal water drains from the volcano's caldera."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.0 just NW of Grindavík"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 40 earthquakes were detected at Öræfajökull, similar to last week. The largest earthquake was M2.0, but others were M1.6 and smaller. The Department of Civil Protection and Emergency Management still maintains its risk code at uncertainty level."}],"additional_notes":""},{"id":216,"published_at":"2018-06-27T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Over 100 earthquakes were detected in Öræfajökull during the last week, more than the previous week. Most of them were between M0.5 -1.0. On June 21st a M2.6 earthquake was detected. Then on June 26th a M3.1 earthquake was detected and a few minor earthquakes followed. The M3.1 earthquake was felt in the nearby settlements.There were no signs of volcanic tremor. The seismic rate for June has already exceeded the monthly mean level after a couple of months of overall decreased sesmic activity (http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html). The hydrological monitoring data are not showing significant changes to be reported. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":217,"published_at":"2018-07-04T11:26:00Z","entries":[{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm in Reykjaneshryggur. M3.0 and M3.4 earthquakes were recorded on the 28th June. See additional notes."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Over 100 earthquakes were detected in Öræfajökull during the last week. This rate is similar to the previous week. Most of the earthquakes were between M0.5 -1.0. On June 26th a M3.2 earthquake was detected and a few minor earthquakes followed. The M3.2 earthquake was felt in the nearby settlements. The seismic rate for June has already exceeded the monthly mean level after a couple of months of apparent decreased seismic activity (http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html). The hydrological and geochemical monitoring data are not showing significant changes to be reported. The seismic activity as well as recent deformation data (either GPS and InSAR data) indicate that the inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Reykjaneshryggur: An earthquake swarm was recorded on June 28th and 29th just 70 km SW of Reykjanes peninsula. The largest events were M3.0 at 17:21 and M3.4 at 23:55 on June 28th. Similar swarms have been detected in the area occasionally in the past years."}],"additional_notes":""},{"id":218,"published_at":"2018-07-11T10:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Over 30 earthquakes were detected in Öræfajökull during the last week. This is a much smaller number than the over 100 earthquakes detected the previous week. All the earthquakes were of magnitude less than 1.0, except for two M1.1 eartquakes. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The hydrological and geochemical monitoring data are not showing significant changes to be reported. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":219,"published_at":"2018-07-18T10:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Over 20 earthquakes were detected in Öræfajökull during the last week. This is less activity then last week and much less then previous weeks. All the earthquakes were of magnitude less than 1.0. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes, however there is an increase of geothermal water in Kotá river (seen in the conductivity and river height data) which we are following closely. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":220,"published_at":"2018-07-25T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 earthquake on 20 July at 06:28"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Over 40 earthquakes were detected in Öræfajökull during the last week. This is more activity than last week. All the earthquakes were of magnitude 1.3 or less. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":221,"published_at":"2018-08-01T10:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.7 earthquake on 01 August at 07:08"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Over 30 earthquakes were detected in Öræfajökull during the last week. Similar activity as last week. All the earthquakes were of magnitude 1.3 or less. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":222,"published_at":"2018-08-08T11:30:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.7 earthquake on 02 August at noon"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Over 60 earthquakes were detected in Öræfajökull during the last week. Similar activity as last week. All the earthquakes were of magnitude 1.5 or less. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Mýrdalsjökull: There was considerable seismic activity in Mýrdalsjökull this week, mostly on August 2nd. Over 75 earthquakes were detected during the week, the largest one M3.7 on August 2nd. Increased levels of conductivity has been detected for the past week and a small glacial outburst has been detected. Vatnajökull: During the week-end there was a large jökulhlaup (glacial outburst) from Skaftá. GPS measurements showed a rapid decrease in elevation on Thursday August 2nd and on Friday August 3rd the glacial outburst had started. The maximum discharge was reached on mid-night Sunday, August 5th."}],"additional_notes":""},{"id":223,"published_at":"2018-08-15T10:30:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 earthquake on August 8th at 21:31."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Over 20 earthquakes were detected in Öræfajökull during the last week. Less activity than in previous week. All the earthquakes were of magnitude 1.6 or less. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Mýrdalsjökull: There was considerable seismic activity in Mýrdalsjökull this week, mostly on August 8th. Over 40 earthquakes were detected during the week, the largest one M3.2 on August 8th. Increased levels of conductivity has been detected for the past week and a small glacial outburst was detected last week. Conductivity is decreasing to normal levels. Vatnajökull: The large jökulhlaup (glacial outburst) from Skaftá is over. Less than 10 earthquakes in Bárðarbunga this week, all below M1,9."}],"additional_notes":""},{"id":224,"published_at":"2018-08-22T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 on 16 August at northern rim of the caldera"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"A swarm of ~20 events occurred within the western part of the Torfajökull caldera last week, 16 – 20 August. The two largest events (16 Aug) were of magnitude M3.3 and M3.8. The 3.8 event is the largest event recorded since the installation of the digital seismic network (SIL, 1991). No tremor was observed following this event (swarm)."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 60 earthquakes were detected in Öræfajökull during the last week, all small (M<=2.2). Activity remains similar as during previous weeks. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":225,"published_at":"2018-08-29T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 90 earthquakes were detected in Öræfajökull during the last week, which is slightly higher activity compared to last week. The largest earthquake was of M2.2, most of the others were smaller than M1.0. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Tomorrow on the 30th of August will be a scientific meeting to discuss and assess the latest available data on Öræfajökull."}],"additional_notes":""},{"id":226,"published_at":"2018-09-05T11:00:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"There were fewer earthquakes located at Öræfjökull during the past week, around 60 events, compared to ~90 events located the week before. The number of earthquakes is thus similar to the number reported two weeks ago. All events were small, only two reached magnitude 2.0. The rate of detected events has been increasing slightly, and was higher in August than during previous months, as can be seen on the plot linked below, plot of seismic rate in Öræfajökull relative to previous days and months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":227,"published_at":"2018-09-12T11:30:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"About 60 earthquakes were detected in Öræfajökull during the last week, similar number of earhqukes as in the previous week, slight increase in energy relese as three earthquakes measured larger than M2.0 and a forth M1.9. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":228,"published_at":"2018-09-19T11:30:00Z","entries":[{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 13th of September at 20:17, two earthquakes of magnitude around M4 occurred, 5 seconds apart, 6 km south of Bláfjöll mountains, on the margin of the Brennisteinsfjöll fisssure swarm, on the Reykjanes Peninsula in SW-Iceland. They were felt widely in the capital area. Several smaller aftershocks were recorded and three days later seismic activity migrated 6 km westwards, to Brennisteinsfjöll. Earthquakes of similar magnitude occur regularly without any sign of volcanic activity and events of magnitude up to ~ M6 can occur. See: http://en.vedur.is/about-imo/news/earthquakes-around-blafjoll-ski-are"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"About 40 earthquakes were detected in Öræfajökull during the last week, fewer earthqukes than during the previous weeks. Most of the earthquaeks originated NE of the caldera, the largest events measured M 2.7 and M 2.4. The seismic rate in Öræfajökull relative to previous days and months can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html. The geochemical and hydrological monitoring data are not showing significant changes. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":229,"published_at":"2018-09-26T11:30:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 on 21. september"}],"additional_notes":"Öræfajökull:\nAbout 50 earthquakes were detected in Öræfajökull during the last week, a little more earthquakes than during the previous week, but similar to the weeks before. Most of the earthquakes originated NE of the caldera, the largest event measured M3.1 on 21. September, followed by about 20 aftershocks. Earthquakes with magnitude larger than M3.0 are not very common in the area. Since the beginning of the unrest in September 2017 only five earthquakes of similar magnitude have been detected. The monthly rate of earthquakes in September is still well above the background level as can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The geochemical and hydrological monitoring data are not showing significant changes, but new samples from the rivers will be collected as soon as weather allows for analyses. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."},{"id":230,"published_at":"2018-10-03T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.0 on the 1st of October and M3.6 on the 2nd of October"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 on the 1st of October"}],"additional_notes":"Bárðarbunga\nTwo earthquakes larger than three were detected this week. One was of M3.0 on the 1st of october at 06:09 and another on the 2nd of October at 13:08. Both were located on the northeastern rim of the caldera. Since the end of the last eruption in March 2015, more than 170 earthquakes larger than M3 have been recorded around and within the caldera of Bárðarbunga volcano. The largest one had M4.9 and occurred on the 30 of January this year. A plot showing this trend is available here http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html\nÖræfajökull:\nAbout 100 earthquakes were detected in Öræfajökull during last week, around twice more than the previous week. Most of the earthquakes originated in the southeastern part of the caldera. The largest event measured M3.1 on the 2nd of October at 23:15, followed by a few aftershocks. Earthquakes with magnitude larger than M3.0 are not common in the area. Since the beginning of the unrest in September 2017 only five earthquakes of similar magnitude have been detected. The monthly rate of earthquakes for the last two months have been well above the background level as can be seen at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The geochemical and hydrological monitoring data are not showing significant changes, but new samples from the glacial rivers will be collected as soon as weather allows, hopefully during next week. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."},{"id":231,"published_at":"2018-10-10T11:10:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 on the 1st of October"}],"additional_notes":"Öræfajökull:\nNearly 50 earthquakes were detected in Öræfajökull during last week, a similar weekly rate as detected during previous weeks (except for last week when it was two times higher) and the seismic activity is still high. The largest magnitude was M2.8, the event occurred at the eastern caldera rim. Other events were distributed around the caldera rim and had magnitudes M 1.5 or lower. A small, short-lived swarm occurred this morning, all events were small (M 0.9 and lower). http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html New water samples from the glacial rivers around the volcano have just been collected and have been sent for analysis. The nearby rivers are closely monitored by IMO. The geochemical and hydrological monitoring data have not shown significant changes. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."},{"id":232,"published_at":"2018-10-17T11:50:00Z","entries":[{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"7 earthquakes <M0.8 were measured in Hekla on the 14th of October."}],"additional_notes":"Öræfajökull:\nAround 35 earthquakes were detected in Öræfajökull during last week, somewhat fewer than in previous weeks. The largest measured M2.1 on the 15th of October at the southeastern caldera rim. Other events were widely distrubuted around the caldera and most of them were located northwest of the caldera with magnitudes M1.2 or lower. http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html New GPS data suggest that inflation has exceeded since early 2018. New water samples from the glacial rivers around the volcano have been collected and show a minor geochemical leakage which has reduced compared to the last measurements taken. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."},{"id":233,"published_at":"2018-10-24T11:15:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"3 earthquakes of M>3 on the 22nd and 23rd of October"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 20 earthquakes were detected in Öræfajökull during last week, somewhat fewer than in previous weeks. All earthquakes war smaller than M1.5 Events were mostly located northwest of the caldera. http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html New GPS data suggest that inflation has exceeded since early 2018. New water samples from the glacial rivers around the volcano have been collected and show a minor geochemical leakage which has reduced compared to the last measurements taken. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":"Bárðarbunga:\nThree earthquakes larger than M3 were detected this week. On the 22nd of October at 22:35 and earthquake of M3.9 occurred in the southern part of the Bárðarbunga caldera. Roughtly 1 minute before an earthquake of M2.8 occurred in the same area. At 00:08 on the 23rd of October an earthquake of M4.6 occurred followed by an M3.5, both occurred in southern part of the caldera. Since the end of the last eruption in March 2015, more than 170 earthquakes larger than M3 have been recorded around and within the caldera of Bárðarbunga volcano. The largest one had M4.9 and occurred on the 30 of January this year. A plot showing this trend is available here http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"id":234,"published_at":"2018-10-31T11:15:00Z","entries":[{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.0 on the 28th of October"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 35 earthquakes were detected in Öræfajökull during last week. The largest earhquake was of M2.2. Other earthquakes were smaller than M1.8. http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html New GPS data suggest that inflation has exceeded since early 2018. New water samples from the glacial rivers around the volcano have been collected and show a minor geochemical leakage which has reduced compared to the last measurements taken. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":"Krýsuvík:\nAn earthquake of M3.0 was detected on the 28th of October at 10:52 just west of Kleifarvatn during a small earthquake swarm in the area. The earthquake was felt in the Reykjavík area."},{"id":235,"published_at":"2018-11-07T11:30:00Z","entries":[{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 25 earthquakes were detected in Öræfajökull during last week. The largest earhquake was of M1.9. Other earthquakes were smaller. http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html New GPS data suggest that inflation has exceeded since early 2018. New water samples from the glacial rivers around the volcano have been collected and show a minor geochemical leakage which has reduced compared to the last measurements taken. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":236,"published_at":"2018-11-14T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two eq M3.6 and M3.3 on 12 November at 19:21 and 19:23"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 13 earthquakes were detected in Öræfajökull since last week. The largest earthquake had a magnitude M1.8. Other earthquakes were smaller. http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html New GPS data suggest that inflation has exceeded since early 2018. New water samples from the glacial rivers around the volcano have been collected and show a minor geochemical leakage which has reduced compared to the last measurements taken. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":"Bárðarbunga:\nTwo earthquakes of M3.6 and M3.3 occurred on the northern rim of the Bárðarbunga caldera on 12 November at 19:21 and 19:23."},{"id":237,"published_at":"2018-11-21T11:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"M2.8 was detected in Askja 14.11.2018 09:26:31."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 20 earthquakes were detected in Öræfajökull since last week. The largest earthquake had a magnitude M1.6 Other earthquakes were smaller. http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html New GPS data suggest that inflation has exceeded since early 2018. New water samples from the glacial rivers around the volcano have been collected and show a minor geochemical leakage which has reduced compared to the last measurements taken. The nearby rivers are closely monitored by IMO. The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull."}],"additional_notes":""},{"id":238,"published_at":"2018-11-28T12:15:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 on 23rd of November at 21:37"},{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 on 24th of November at 11:44"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 on 23rd of November at 05:41"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 17 earthquakes were detected in Öræfajökull since last week. The largest earthquake was located in the center of the caldera and was M1.5. Other earthquakes were smaller than M1.0. The monthly earthquake rate for November is so far lower than the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Hekla: Around 25 earthquakes were located within the Hekla volcanic system. All of them with magnitude below M0.9 and the majority of them smaller than M0.5. Approximately 20 earthquakes were located about 5 km southwest of the top of the volcano. The tectonically active South Iceland Seismic Zone extends toward Hekla, and these earthquakes are likely associated with that zone Bárðarbunga: The M3.5 earthquake on 23rd of November was located around 10 km east of Hamarinn close to the western Skaftá cauldron at the Lokahryggur ridge. Hamarinn is the second central volcano of the 190 km long Bárðarbunga volcanic system. Since 2000, 14 earthquakes larger than M3.0 have been located in this area. Grímsvötn: The M3.2 earthquake at the Grímsvötn caldera on 23rd of November is the largest earthquake there since the 2011 eruption. Earthquakes of this size are not common in this area during time of rest. Except for this earthquake there are no other geophysical data showing an escalation in the activity at Grímsvötn. Overall seismicity has been slowly increasing over the last months as showned in the plot at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html"}],"additional_notes":""},{"id":239,"published_at":"2018-12-05T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 50 earthquakes were detected in Öræfajökull since last week. That is an increase in number of earthquakes from the last couple of weeks when around 20 earthquakes have been detected. However, all the earthquakes this week were small, majority of them less than M1.0. The largest earthquakes were M1.2, one in the southern part of the caldera and one just north of the caldera. Approximately half of the earthquakes this week occurred in a seismic swarm in the southern part of the caldera the 1st of December. The monthly earthquake rate for November was lower than the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Hekla: Seven small earthquakes, all below M0.7, were located within the Hekla volcanic system this week, which is less than last week when around 25 earthquakes were located there. Location of the earthquakes was scattered around the volcanic system and probably related to cold weather conditions in the area. This phenomena has been seen in the past in other parts of the country when a significant drop in the air temperature, below freezing point, occurs. Bárðarbunga: This week the largest earthquake in the caldera of Bárðarbunga was M2.4 and the total number of earthquakes 36. Majority of the earthquakes were smaller than M1.0. Grímsvötn: This week the largest earthquake in Grímsvötn caldera was M1.7 and the total number of earthquakes four. Overall seismicity in Grímsvötn has been slowly increasing over the last months as showned in the plot at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html"}],"additional_notes":""},{"id":240,"published_at":"2018-12-12T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 20 earthquakes were detected in Öræfajökull since last week. The largest earthquake occurred on 8 December at 09:35 and had a magnitude M2.6. Three earthquakes had magnitudes around M1.3 and others were below M1.0. The monthly earthquake rate for November was lower than the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Hekla: Only one shallow earthquake of magnitude M1.0 was detected. Bárðarbunga: This week the largest earthquake in the caldera had a magnitude M2.0 and the total number of earthquakes 18. Four earthquakes had magnitudes larger than M1.0. Grímsvötn: Four earthquakes were detected and all of them had magnitudes around M1.0. Overall seismicity in Grímsvötn has been slowly increasing over the last months as showned in the plot at the following link: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html"}],"additional_notes":""},{"id":241,"published_at":"2018-12-19T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.6 on the on the 17th of December & M 3.4 on the 18th of December"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Only 9 earhtuakes were detected in Öræfajökull since last week. The largest earthquake occurred on the 14th of December at 11:13 and had a magnitude M1.6. The monthly earthquake rate for November was lower than the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Bárðarbunga: On the 17th of December an earthquake of M3.6 occurred within the Bárðarbunga caldera at 06:59. On the 18th of December an earthquake of M3.4 occurred at 18:45. 37 earthquakes were located in the Bárðarbunga caldera this week."}],"additional_notes":""},{"id":242,"published_at":"2018-12-26T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 on the 25th of December"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Only 9 earhtuakes were detected in Öræfajökull since last week. The largest earthquake was measured on the 20th of December of magnitude M1.5. The monthly earthquake rate for December is so far lower than the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Bárðarbunga: On the 25th of December an earthquake of M3.1 occurred within the Bárðarbunga caldera at 15:38. 28 earthquakes were located in the Bárðarbunga caldera this week."}],"additional_notes":""},{"id":243,"published_at":"2019-01-02T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.8 on the 28th of December, M3.7 and M3.5 were the largest aftershocks."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"11 minor earthquakes were detected in Öræfajökull since last week, all below magnitude 1.0. The monthly earthquake rate for December was lower than the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Bárðarbunga: In the night of 28th of December an earthquake of M4.8 occurred in the northern part of the Bárðarbunga caldera at 01:16 in the morning. This is the third largest earthquake in Bárðarbunga since the end of last eruption in Holuhraun 2014-2015. Some aftershocks followed, two largest of magnitudes 3.7 and 3.5. Total number of earthquakes in Bárðarbunga last week was 17 quakes. Hengill and nearby areas: In the early morning of 30th of December at 02:56 an earthquake of 4.4 occurred 9km south of Hengill. This earthquake was felt in nearby towns and in Reykjavík. This is a know seismically active area on the South Icelandic Seismic Zone."}],"additional_notes":""},{"id":244,"published_at":"2019-01-09T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"12 earthquakes were detected in Öræfajökull since last week, the largest M2.3 and the rest smaller. The monthly earthquake rate for December was lower than the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Bárðarbunga: A very quiet week in Bárðarbunga with only three earthquakes, all smaller than M1.0. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Hengill and nearby areas: A few more aftershocks have been detected in the area after the M4.4 earthquake that occurred on the 30. December 2018 with the largest M1.2."}],"additional_notes":""},{"id":245,"published_at":"2019-01-16T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"13 earthquakes were detected in Öræfajökull during the last week, one M2.2 and the rest all below magnitude 1.0. The monthly earthquake rate for January was lower than the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Bárðarbunga: A quiet week in Bárðarbunga with 12 earthquakes, all smaller than M1.8. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"}],"additional_notes":""},{"id":246,"published_at":"2019-01-23T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Seven earthquakes were detected in Öræfajökull during the last week, all below magnitude 1.0. The monthly earthquake rate for January is so far lower than the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html The seismic activity as well as recent deformation data (GPS and InSAR data) indicate that a slow inflation process at Öræfajökull is ongoing and the volcano is still in an unrest phase. The Department of Civil Protection and Emergency Management still maintains the uncertainty level for the area around Öræfajökull. Bárðarbunga: A quiet week in Bárðarbunga with 15 earthquakes, the largest M2.4 and majority of them below M1.0. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"}],"additional_notes":""},{"id":247,"published_at":"2019-01-30T15:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Roughly 90 earthquakes were detected on the Reykjanesridge and peninsula last week, considerably more then the previous weeks. Two M3.0 earthquakes occured on the Reykjanes ridge on the 25th of January and another of the same size by Kleifarvatn on the 26th. -------------------------------------------------------------------------------------------------------- On the 28 January 2019, representatives from Civil Protection, Institute of Earth Science, ISAVIA and Icelandic Meteorological Office, met to discuss and review the activity status at five volcanoes, i.e. Öræfajökull, Bárðarbunga, Grímsvötn, Katla and Hekla. In the following a summary of the monitoring data, its interpretation and a general hazard assessment is provided for each volcano."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"At 10:02 the 27th of January an earthquake M3.7 occured in the northwest part of the Torfajökull caldera. Roughly 15 aftershocks followed, all below M2.0. The area is prone to earthquake activity, however earthquakes above M3.0 are rare."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Summary: The seismicity is currently comparable with that prior the unrest. Over the last three months the seismicity (both in terms of number of earthquakes and their size) has been gradually decreasing. Preliminary results from a local earthquake tomography performed by colleagues at the University of Uppsala indicates an anomaly (high vp/vs ratios) located beneath the center of the volcano at a depth between 4 to 8 km. This anomaly might reflect the presence of a magma body. Deformation data (cGPS and GPS campaign) shows continued inflation indicating an inflow of new magma. Analysis of water samples from the three major glacial rivers shows no change in the geochemical composition over the past months, confirming the absence of geothermal water in the rivers. Aerial geochemical monitoring has not detected any anomalous concentration of H2S, SO2 and CO2 over the past months. The ice cauldron in the center of the caldera has been declining since early 2018. The hydrological data from Kvíá, Virkisá and Kotá do not indicate geothermal activity. Occasional variations in the conductivity values can be explained by weather conditions at the time. Hazard assessment Öræfajökull volcano still shows signs of unrest as indicated by the ongoing inflation. No imminent hazards to aviation are expected. This level of activity may continue over the coming months/years. However, an acceleration or deceleration of the activity cannot be excluded."}],"additional_notes":"Öræfajökull:\n15 earthquakes were deteced in Öræfajökull during last week, all below a magnitude 1.0. The monthly earthquake rate for January is so far lower then the previous three months: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html\nBárðarbunga:\nA quiet week in Bárðarbunga with 3 earthquakes inside the caldera, all below a M1.0. In addition, 20 deep earthquakes were detected in the dike in two earthquake swarms on the 27th and 30th of January. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"id":248,"published_at":"2019-02-06T15:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"One earthquake M2.2 by the Southern Caldera Rim."},{"volcano_code":"VES","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake M3.4 was measured about 2,2 km NW of Surtsey Island. See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Summary: The seismicity is currently comparable with that prior the unrest. Over the last three months the seismicity (both in terms of number of earthquakes and their size) has been gradually decreasing. Preliminary results from a local earthquake tomography performed by colleagues at the University of Uppsala indicates an anomaly (high vp/vs ratios) located beneath the center of the volcano at a depth between 4 to 8 km. This anomaly might reflect the presence of a magma body. Deformation data (cGPS and GPS campaign) shows continued inflation indicating an inflow of new magma. Analysis of water samples from the three major glacial rivers shows no change in the geochemical composition over the past months, confirming the absence of geothermal water in the rivers. Aerial geochemical monitoring has not detected any anomalous concentration of H2S, SO2 and CO2 over the past months. The ice cauldron in the center of the caldera has been declining since early 2018. The hydrological data from Kvíá, Virkisá and Kotá do not indicate geothermal activity. Occasional variations in the conductivity values can be explained by weather conditions at the time. Hazard assessment Öræfajökull volcano still shows signs of unrest as indicated by the ongoing inflation. No imminent hazards to aviation are expected. This level of activity may continue over the coming months/years. However, an acceleration or deceleration of the activity cannot be excluded."}],"additional_notes":"Öræfajökull:\nJust under 50 earthquakes were deteced in Öræfajökull during last week, a large majority under M1.0. The largest earthquake measured M2.6 on February 4th. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html\nBárðarbunga:\nOne earthquake was mesured within the Bárðarbunga caldera rim M2.2 by the southern caldera rim on February 4th. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Vestmannaeyjar: Earthquake M3.4 was measured about 2.2 km NW of Surtsey Island on January 31st, three earthquakes followed, largest of which measured M1.5. Five earthquakes bigger than M3.0 have been measured since 1991, and this weeks earthquake is the largest. No further activity has been observed since then. -------------------------------------------------------------------------------------------------------- On the 28 January 2019, representatives from Civil Protection, Institute of Earth Science, ISAVIA and Icelandic Meteorological Office, met to discuss and review the activity status at five volcanoes, i.e. Öræfajökull, Bárðarbunga, Grímsvötn, Katla and Hekla. In the following a summary of the monitoring data, its interpretation and a general hazard assessment is provided for each volcano."},{"id":249,"published_at":"2019-02-13T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Nine earthquakes. Largest M2.0."},{"volcano_code":"VES","vona_color_code":"GREEN","vals_level":null,"status_text":"No more activit1"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"About 10 earthquakes were detected in Öræfajökull during last week, all less than M1.0. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":"Bárðarbunga:\nNine earthquakes in the calera. Largest M2.0. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Vestmannaeyjar: No earthquakes were detected. Hekla: One earthquake M0,5. Katla: Six earthquakes. Largest M1.8. Grímsvötn: One earthquake M1.3. -------------------------------------------------------------------------------------------------------"},{"id":250,"published_at":"2019-02-20T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Eight earthquakes in the calera. Largest M2.2. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Katla: 13 earthquakes detected in Katla during last week, the largerst was of M3.0 on the 18th of february at 22:01. An overview of the seismic activity is available at: http://hraun.vedur.is/ja/Katla/katla_qu_trends.html"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.0 on the 18th of february at 22:01"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"About 20 earthquakes were detected in Öræfajökull during last week, all less than M0.8. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":251,"published_at":"2019-02-27T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"14 earthquakes in the caldera. Largest was M4.2 on February 23. Earthquake of M2.7 preceded the large earthquake and few much smaller earthquakes followed. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Katla: Two small earthquakes were detected in the Katla caldera last week, both smaller than M0.8. An overview of the seismic activity is available at: http://hraun.vedur.is/ja/Katla/katla_qu_trends.html"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"About 10 earthquakes were detected in Öræfajökull during last week, all smaller than M1.2. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":252,"published_at":"2019-03-06T10:50:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"At 05:46 on 4th of March an M3.8 earthquake was detected and shortly after an M4.1 followed with few aftershocks largest M3.3. No signs of volcanic tremor. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"About 10 earthquakes were detected in Öræfajökull during last week, all smaller than M1.0. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":253,"published_at":"2019-03-13T10:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Fifteen earthquakes were detected in Bárðarbunga during last week, the two largest earthquakes were M1.7. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Six earthquakes were detected in Öræfajökull during last week, all smaller than M1.0. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":254,"published_at":"2019-03-20T10:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seven earthquakes were detected in Bárðarbunga during last week, the largest M2.7, one M1.4, the others smaller than M1.0. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":null,"status_text":"Twentyseven earthquakes were detected in Geitlandsjökull during last week, the largest M3.0, four M2.3-2.7, others smaller than M2.0. A minor seismic swarm is ongoing about 10KM NE of Grímsey."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake activity is decresing. Seventeen earthquakes were detected in Öræfajökull during last week, one M1.1 but others smaller than M1.0. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":255,"published_at":"2019-03-27T10:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquakes were detected inside the Bárðarbunga caldera during last week, largest measured M1.8, M2.7, 11 minor earthquakes were located about 10 km ESE of the caldera. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Other info: A seismic swarm is ongoing about 6KM SW of the town of Kopasker, NW-Iceland."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake activity was low this week, with 6 earthquakes detected in the Öræfajökull caldera, largest M0.8 The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":256,"published_at":"2019-04-03T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"No earthquakes were detected inside the Bárðarbunga caldera during last week. Six minor deep earthquakes were located about 10 km ESE of the caldera. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Other info: A seismic swarm is ongoing about 6KM SW of the town of Kopasker, NW-Iceland."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake activity was low this week, with 10 earthquakes detected in the Öræfajökull caldera, largest M0.5 The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":257,"published_at":"2019-04-10T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Only 2 earthquakes were detected inside the Bárðarbunga caldera during last week. Just over 20 deep earthquakes were located about 10 km ESE of the caldera. All below M1.0 An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Other info: The seismic swarm about 6KM SW of the town Kópasker, NW-Iceland is still ongoing, but has been decreasing in the past days."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"About 20 earthquakes were detected in the Öræfajökull caldera, largest M0.6 The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":258,"published_at":"2019-04-17T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"10 earthquakes were detected inside the Bárðarbunga caldera during last week, the largest M1.7. 12 deep earthquakes were located about 10 km ESE of the caldera. All below M0.5. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Other info: The seismic swarm about 6KM SW of the town Kópasker, NA-Iceland is still ongoing, but has been decreasing. For the past week the number of earthquakes has been around 5-20 each day."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"About 20 earthquakes were detected in the Öræfajökull caldera, largest M0.9 The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":""},{"id":259,"published_at":"2019-04-24T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Only 4 earthquakes, all smaller than M2.2 were detected inside the Bárðarbunga caldera during last week. Less than 10 deep earthquakes were located about 10 km ESE of the caldera. All below M1.0 An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Other info: The seismic swarm about 6KM SW of the town Kópasker, NW-Iceland is over but a few earthquakes are still being detected on a daily basis."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Less than 10 earthquakes were detected in the Öræfajökull caldera, all smaller than M1.0 The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate.html"}],"additional_notes":""},{"id":260,"published_at":"2019-05-01T10:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Fourteen earthquakes were detected in Bárðarbunga caldera during last week, the largest M1.5. Three deep earthquakes, all below M1.0, were detected about 10 km ESE of the caldera. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Five earthquakes were detected in the Öræfajökull caldera, all smaller than M1.0 The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate.html"}],"additional_notes":""},{"id":261,"published_at":"2019-05-08T10:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Six earthquakes were detected in Bárðabunga caldera during last week, the largest M2.0. Four earthquakes, all below M1.0, were detected around 10 km ESE of the caldera. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"A minor seismic swarm in Torfajökull, totaling of 32 earthquakes, where a majority of them occurred the 2nd of May. The largest earthquake detected was a M2.1"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes were detected in the Öræfajökull caldera, both smaller than M1.0. Around 30 earthquakes, all below a M1.0, were scattered around Öræfajökull and it’s outlet glaciers. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate.html"}],"additional_notes":"Herðubreið Ongoing seismic swarm few km south of Herðubreið, northeast of Askja volcano. Just under 200 earthquakes were detected last week. The largest earthquake was a M2.4 on May 3rd."},{"id":262,"published_at":"2019-05-15T10:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Fourteen earthquakes were detected in Bárðabunga caldera during last week, the largest M0.8. One deep earthquak below M1.0, was detected around 10 km ESE of the caldera. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquekes were detected in Hekla on May 8th. The largest was a M1.4."},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":null,"status_text":"Seven earthquekes were detected in Hengill. The largest earthquake was a M2.5 on May 12th."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Sixteen earthquekes were detected in Torfajökull. Six were over M1.0 and the largest M2,7 on May 13th."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Six earthquakes were detected in the Öræfajökull caldera, both smaller than M1.0. Around 30 earthquakes were scattered around Öræfajökull and it’s outlet glaciers, the biggest M2.3 but others smaller than M1.0. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate.html"}],"additional_notes":"Herðubreið Ongoing seismic swarm few km south of Herðubreið, northeast of Askja volcano. About 200 earthquakes were detected last week. The largest earthquake was a M2.4 on May 12th."},{"id":263,"published_at":"2019-05-22T11:40:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Five earthquakes were detected in Bárðabunga caldera during last week, the largest M1.1. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html Herðubreið and Dyngjufjöll Ongoing seismic swarm few km south of Herðubreið, northeast of Askja volcano. Also in Dyngjufjöll ytri – a few km north of Askja volcano. About 180 earthquakes were detected last week. The largest earthquake was a M2.8 on May 21st."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Twentysix earthquakes were detected scattered around Öræfajökull and it’s outlet glaciers , all smaller than M1.0. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate.html"}],"additional_notes":"Grímsvötn: Eight earthquakes were detected in and around Grímsvötn caldera. Largest one was M1.9. The accumulative seismic moment compared to past eruptions: http://hraun.vedur.is/ja/vatnajokulsvoktun/grf_uppsafn.html"},{"id":264,"published_at":"2019-05-29T11:40:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Five earthquakes were detected in Bárðabunga caldera during last week, all below M2.0. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M2.6 on May 29th at 08:30:59 UTC. No tremor. See additional notes."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Twenty earthquakes were detected scattered around Öræfajökull and it’s outlet glaciers , all smaller than M1.0. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate.html"}],"additional_notes":"Mýrdalsjökull: More than 10 minor earthquakes within the Katla caldera were detected this week. On May 29th at 08:30:59 UTC an earthquake of M2.6 was detected in the E-part of the caldera. No earthquakes followed and no tremor was detected. Grímsvötn: More earthquakes were detected in and around Grímsvötn caldera this week than the last. Largest one was M2.5 on May 22nd at 19:08 UTC. The accumulative seismic moment compared to past eruptions: http://hraun.vedur.is/ja/vatnajokulsvoktun/grf_uppsafn.html"},{"id":265,"published_at":"2019-06-05T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Five earthquakes were detected in Bárðabunga caldera during last week, all below M1.5. Twenty-two deep earthquakes were detected in a swarm on 31. May where the dyke from Bárðarbunga turns to the northeast. Deep earthquakes are detected from time to time in this area. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Eighteen earthquakes were detected scattered around Öræfajökull and it’s outlet glaciers , all smaller than M1.0. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate.html"}],"additional_notes":"Grímsvötn: Four earthquakes were detected in and around Grímsvötn caldera, fewer than last week. Largest one was M1.5 on June 3rd at 21:23 UTC. The accumulative seismic moment compared to past eruptions: http://hraun.vedur.is/ja/vatnajokulsvoktun/grf_uppsafn.html"},{"id":266,"published_at":"2019-06-12T10:15:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Nine earthquakes were detected in the Bárðabunga caldera during last week, the largest one M 2.4. 11 deep earthquakes were detected southeast of the Bárðarbunga caldera, where the dyke from Bárðarbunga turn northeast. Deep earthquakes are detected from time to time in this area. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"The uncertainty phase due to unrest in Öræfajökull has been cancelled! https://www.almannavarnir.is/english/english-news/uncertainty-phase-due-to-unrest-in-oraefajokull-volcano-cancelled/ Seventeen earthquakes were detected scattered around Öræfajökull and it’s outlet glaciers , all smaller than M1.0. The weekly earthquake rate is available at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_rate.html"}],"additional_notes":"Grímsvötn: Eight earthquakes were detected in and around Grímsvötn caldera, more than last week. The largest one was M1.5. The accumulative seismic moment compared to past eruptions: http://hraun.vedur.is/ja/vatnajokulsvoktun/grf_uppsafn.html"},{"id":267,"published_at":"2019-06-19T10:15:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3,4 on June 18th at 22:30"}],"additional_notes":"Bárðarbunga:\nLast night, June 18th at 22:30 UTC and earthquake occurred in Bárðarbunga caldera of M3.4. Two smaller eartquakes followed but no volcanic tremor. Around dozen earthquakes were detected in Bárðarbunga last week, a bit more than the previous week. Ten deep earthquakes were detected southeast of the Bárðarbunga caldera, where the dyke from Bárðarbunga turn northeast. Deep earthquakes are detected from time to time in this area. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"id":268,"published_at":"2019-06-26T10:15:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4,1 at 13:55, M3,1 at 13:09, M3,4 at 13:18 and M2,3 at 13:22 on June 26th."}],"additional_notes":"Bárðarbunga:\nThe 24th of June at 13:55 UTC an earthquake of M4.1 occurred in the NW-rim of Bárðarbunga caldera. Three other earthquakes occurred the same day at 13:09, 13:18 and 13:22 of M3.1, M3.4 and M2.3 respectively. Few minor earthquakes followed but there was no indication of volcanic tremor. Since the end of the eruption in 2015 there have been several M3 or larger earthquakes detected within and along the Bárðarbunga caldera. Along with the inflation signal, this occasional intense seismic activity has been interpreted as an indication of a continuous inflow of new magma at depth. An overview of the seismic activity since the end of the eruption in 2015 is available at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"id":269,"published_at":"2019-07-03T12:45:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Since the last large earthquakes occurred along the caldera rim on the 24th of June, the seismic activity at Bárðarbunga is within the background level established since the end of the eruption, see http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html. The focal mechanism reconstructed for the recent earthquakes larger than M4 suggest a tectonic origin and they are all consistent with a process of uplift of the caldera floor. The deformation rate at Bárðarbunga is slowing down and it has been flattening since October-November 2018. The recent gas samples collected in June 2019 compare well with those taken the preceding year, suggesting that no changes are occurred in the deep volcanic system over the last 1-1,5 years. All monitoring parameters indicate that Bárðarbunga volcano is recharging and receiving new magma at depth."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"About 30 earthquakes were located in Öræfajökull during the past week. Over the last months the seismicity seems to be more spread all over the central volcano and since May-June 2019 it is very shallow. This is probably reflecting dynamic processes occurring at the glacier, like ice movement and water flowing beneath the ice. From a recent analysis of both seismic and deformation data (including InSAR and cGPS) there are indication that magma inflow is most likely still on-going at the volcano but at a lower rate (as since Oct-Nov 2018). Measurements of H2S and SO2 along the glacial river Kvíá suggest that geothermal fluids are still released from the system, but the atmospheric gas concentration does not represent a health hazard. An overview of the seismic activity at Öræfajökull can be found at: http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html"}],"additional_notes":"A scientific internal meeting took place at IMO on 1st of July. Seismic, deformation, geochemical and hydrological data hve been discussed. Here are some outcomes:"},{"id":270,"published_at":"2019-07-10T10:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Two ice cauldrons in Mýrdalsjökull glacier have been discovered to be full and therefore a glacial outburst flood is expected in the near future. These floods usually do not affect volcanic activity, but on very rare occasions, have triggered eruptions. The IMO is closely monitoring the area."}],"additional_notes":""},{"id":271,"published_at":"2019-07-17T10:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismic activity in Katla has increased in the last week, the activity is mostly within the caldera. It is not unusual for seismic activity to increase in the summer months. http://hraun.vedur.is/ja/Katla/katla_qu_trends.html The two ice cauldrons in Mýrdalsjökull glacier that were mentioned in last weeks report have not emptied. The IMO has increased the monitoring by adding a GPS on one of the cauldrons. The glacial outburst flood is expected in July or August. These floods usually do not affect volcanic activity, but on very rare occasions, have triggered eruptions. The IMO is closely monitoring the area. http://brunnur.vedur.is/gps/katlaketill.html"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 on 12th July at 17:16"}],"additional_notes":"Torfajökull:\nThe M3.2 occurred in a geothermal active area and a few aftershocks were measured."},{"id":272,"published_at":"2019-07-24T13:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismic activity in Katla has decreased in the last week and is now similar to the activity earlier in the summer. The activity is mostly within the caldera. It is not unusual for seismic activity to increase in the summer months. http://hraun.vedur.is/ja/Katla/katla_qu_trends.html The two ice cauldrons in Mýrdalsjökull glacier that were mentioned in last weeks report have not emptied. The IMO has increased the monitoring by adding a GPS on one of the cauldrons. The glacial outburst flood is expected in July or August. These floods usually do not affect volcanic activity, but on very rare occasions, have triggered eruptions. The IMO is closely monitoring the area. http://brunnur.vedur.is/gps/katlaketill.html"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 on 20th July at 14:15"}],"additional_notes":"Torfajökull:\nThe M3.3 occurred in a geothermal active area and a few aftershocks were measured."},{"id":273,"published_at":"2019-07-31T10:45:00Z","entries":[{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Five minor earthquakes all smaller than M1.3 have been detected in Hekla since July 30th."}],"additional_notes":"Katla:\nThe seismic activity in Katla has decreased in the last week and is now similar to the activity earlier in the summer. It is not unusual for seismic activity to increase in the summer months. http://hraun.vedur.is/ja/Katla/katla_qu_trends.html The two ice cauldrons in Mýrdalsjökull glacier that were mentioned in last weeks report have not emptied. The IMO has increased the monitoring by adding a GPS on one of the cauldrons. The glacial outburst flood is expected in July or August. These floods usually do not affect volcanic activity, but on very rare occasions, have triggered eruptions. The IMO is closely monitoring the area. http://brunnur.vedur.is/gps/katlaketill.html"},{"id":274,"published_at":"2019-08-07T10:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismic activity in Katla has decreased in the last week and is now similar to the activity earlier in the summer. It is not unusual for seismic activity to increase in the summer months. http://hraun.vedur.is/ja/Katla/katla_qu_trends.html The two ice cauldrons in Mýrdalsjökull glacier that were mentioned in previous reports have not emptied. We do not have a time frame of the glacial outburst flood will occur. These floods usually do not affect volcanic activity, but on very rare occasions, have triggered eruptions. The IMO is closely monitoring the area. http://brunnur.vedur.is/gps/katlaketill.html"}],"additional_notes":""},{"id":275,"published_at":"2019-08-14T10:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"The microseismic activity in Grímsvötn has increased in the last week. It is now similar to the activity in May. The largest earthquake was M1.6. http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"The microseismic activity in Öræfajökull has increased slightly in the last week. All of them are smaller than M1.0."}],"additional_notes":""},{"id":276,"published_at":"2019-08-21T10:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"The microseismic activity in Grímsvötn has decreased again down to normal background activity. http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html Increased seismic activity has been recorded in the last two weeks on a ridge (Lokahryggur ridge) northwest of Grímsvötn volcano. Seismic activity is not uncommon there, but activity has been unusually high in the last two weeks compared with the rest of the year."}],"additional_notes":"Bárðarbunga: M3.5 earthquake was located in the northern rim of the caldera at 02:42 last night, a few small aftershocks followed."},{"id":277,"published_at":"2019-08-28T11:00:00Z","entries":[],"additional_notes":"No unusual seismicity was recorded during the week."},{"id":278,"published_at":"2019-09-04T11:00:00Z","entries":[],"additional_notes":"No unusual seismicity was recorded during the week."},{"id":279,"published_at":"2019-09-11T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"On 8. September at 02:02 and 02:03 earthquakes M3,2 and M4,2 occurred in the Bárðarbunga caldera. Few smaller earthquakes followed. Bárðarbunga has been rather quiet in recent weeks, see: http://hraun.vedur.is/ja/Bardarb/bb_qu_trends.html"},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":null,"status_text":"On 11. September at 09:42 an earthquake M3.0 occurred in the Hengill area. Several smaller earthquakes followed. Earthquakes are common in the area."}],"additional_notes":""},{"id":280,"published_at":"2019-09-18T11:00:00Z","entries":[],"additional_notes":"No additional notes this week."},{"id":281,"published_at":"2019-09-25T11:00:00Z","entries":[],"additional_notes":"No additional notes this week."},{"id":282,"published_at":"2019-10-02T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Overall the seismicity has been decreasing since the end of the eruption, however occasional large earthquakes (larger than M4) are still occurring within the caldera (http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html). cGPS measurements display an increase in the rate of inflation since mid-summer."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Over the past two months elevated seismicity has been observed (http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.htm)."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Presently the seismicity is at a low level (http://hraun.vedur.is/ja/hekla/hekla_qu.html). Campaign tilt measurements (undertaken by E. Sturkell – University of Gothenburg) indicates the continued trend of inflation. Gas emissions (CO2) are regularly measured at the summit of the volcano since the Multigas instrument was installed."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Presently the seismicity is at a low level (http://hraun.vedur.is/ja/Katla/katla_qu.html) and no significant changes in deformation have been detected. Occasionally CO2 emissions are detected within the glacial rivers. Since the last few days a small glacial flood from Mýrdalsjökull is ongoing in Múlakvísl river. Episodic emissions of H2S (with peaks up to 20 ppm) are associated with this event."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Since the beginning of 2019 the seismicity has been decreasing (http://hraun.vedur.is/ja/vatnajokulsvoktun/oraefaj_qu_trends.html). Deformation analysis indicates a decrease in the rate of inflation during the past twelve months. There are occasional emissions of gas (H2S) in Kvíá river."}],"additional_notes":"On the 1st of October a long-term natural-hazard monitoring meeting was held at the IMO. During this meeting, the status of five key-volcanoes was assessed in light of recent earthquake activity, detection from satellite images, hydrological data, gas-measurements and deformation."},{"id":283,"published_at":"2019-10-09T10:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes larger than M3.0 occurred in the caldera of Bárðarbunga volcano last week. An M3.1 earthquake was recorded at 20:33 on 3rd of October and an M3.8 earthquake at 16:31 the following day. Twelve other earthquakes were detected in the volcano, of them an M2.8 earthquake was the largest but the majority of them smaller than M1.5."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Since the early morning yesterday, 8th of October, ten earthquakes have been detected in Hekla volcano, there of three larger than M1.0, the largest M1.5. It is rather uncommon that so many earthquakes occur in Hekla over such a short time. However the sensitivity of the seismic network around Hekla has been improved so now more smaller events can be detected in the area. No significant changes in gas emission at the summit of the volcano or the strain network have been observed."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"The glacial outburst flood that was ongoing from Mýrdalsjökull in Múlakvísl river last week is now over. Conductivity and the flow of the river is back to normal values."}],"additional_notes":""},{"id":284,"published_at":"2019-10-16T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake M3.1 was detected in the eastern Skaftá cauldron (in western Vatnajökull ice cap, just east of Grímsvötn volcano) on the 13th of October."}],"additional_notes":""},{"id":285,"published_at":"2019-10-23T13:30:00Z","entries":[],"additional_notes":"No additional notes this week."},{"id":286,"published_at":"2019-10-30T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 on 26. October"}],"additional_notes":"Bárðarbunga\nAn earthquake M3,5 occurred in Bárðarbunga on 26. October. Two small earthquakes followed. 17 earthquakes were detected in Bárðarbunga this week. See: http://hraun.vedur.is/ja/Bardarb/bb_qu_trends.html"},{"id":287,"published_at":"2019-11-06T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity at similar rate as the previous months Deep seismic swarms continue to occur close to the caldera possibly indicating magma inflow Gas measurements (2015-2018) indicate a less magmatic composition Increased geothermal activity is detected by radar profiling of the ice surface (done by Earth Sciences Institute, University of Iceland) Deformation rate apparently increasing since summer 2019 (as from GPS), more data are needed to confirm Krafla (results provided by Earth Sciences Institute, University of Iceland and Iceland GeoSurvey) Inflation signal in the middle of the caldera detected over the period July 2018-July 2019 No increase in the seismicity"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity slowly increasing over the past months Increased geothermal activity is detected by radar profiling of the ice surface (done by Earth Sciences Institute, University of Iceland)"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Pulse of shallow seismicity (all earthquakes smaller than 1,5M) possibly due to instabilities of the volcano edifice (mid-October) No other significant changes over the last month"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Low level of seismicity Episodic leakage of geothermal water (as confirmed by Electrical Conductivity measurement and gas detection)"},{"volcano_code":"KRA","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"The level of seismicity is still very low InSAR analysis indicates reduction in deformation rate, but this interpretation needs to be confirmed by GPS Gas data indicate that possibly the contamination due to geothermal water is decreased"}],"additional_notes":"On the 5th of November a long-term natural-hazard monitoring meeting was held at IMO. During the meeting the most active volcanoes were over-viewed with concern to recent earthquake activity, satellite images, river data, gas-measurements and deformation. Here are the main conclusion of the meeting:"},{"id":288,"published_at":"2019-11-13T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake of M3.1 at 07:30 today. See additional notes"}],"additional_notes":"Askja: The earthquake swarm, that started the 7th of November just east of Askja volcano, is still ongoing. This morning (13.11) at 7:30 an event of M3.1 occurred east of Askja. Around 1200 earthquakes have been recorded in the area since the swarm started. The largest earthquake was M3.4 and occurred on the 9th of November. No volcanic tremor and deformation have been detected in the area. This swarm is likely due to tectonic activity. Earthquake swarms occur regularly around Herðubreið and Askja. IMO is monitoring the activity 24/7."},{"id":289,"published_at":"2019-11-20T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm is in decline. See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake of M4,5 at 13:17 the 16th of November"}],"additional_notes":"Askja: The earthquake swarm, that started the 7th of November just east of Askja volcano, is in decline Around 1300 earthquakes have been recorded in the area since the swarm started. The largest earthquake in the swarm was M3.4 and occurred on the 9th of November. No volcanic tremor and deformation have been detected in the area. This swarm is likely due to tectonic activity. Earthquake swarms occur regularly around Herðubreið and Askja. IMO is monitoring the activity 24/7. Reykjanes: The earthquake swarm, that started the 16th of November around 35 km SW of Reykjanes declined on the 18th of November. The largest earthquake was M4,5 at 13:17 the 16.th of November. Around 30 earthquakes larger than M3,0 occurred in the area during this swarm. No volcanic tremor or deformation has been detected in this active tectonic area."},{"id":290,"published_at":"2019-11-27T10:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm is declining. See additional notes"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Askja: The earthquake swarm, that started the 7th of November just east of Askja volcano is still ongoing but is declining. Around 1600 earthquakes have been recorded in the area since the swarm started, thereof around 200 this week. The largest earthquake in the swarm was M3.6 and occurred on the 9th of November. No volcanic tremor or deformation have been detected in the area. This swarm is likely due to tectonic activity. Earthquake swarms occur regularly around Herðubreið and Askja. IMO is monitoring the activity 24/7. Magnitude of earthquakes occurring in the ongoing swarm near Askja. Cumulative number of earthquakes occurring in the ongoing seismic swarm near Askja. Bárðarbunga: On 24th of November a M4.0 earthquake followed by M3.5 earthquake and few other smaller earthquakes occurred in the southeastern caldera of Bárðarbunga volcano. Earthquakes of this magnitude have occurred regularly since 2015, see more information here http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"id":291,"published_at":"2019-12-04T10:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake swarm is declining. See additional notes"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Askja: The earthquake swarm, that started the 7th of November just east of Askja volcano is still ongoing but is still declining. Bárðarbunga: On 1st of December at 10:22 PM, a M3.8 earthquake occurred in the northeastern Bárðarbunga caldera. One minute before two foreshocks, both of M3.0, occurred at the same location. Earthquakes of this magnitude have occurred regularly since 2015, see more information here http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"id":292,"published_at":"2019-12-11T11:15:00Z","entries":[],"additional_notes":"No additional notes this week."},{"id":293,"published_at":"2019-12-18T11:15:00Z","entries":[{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"An earthquake swarm started in the morning of 15. December and lasted though to the 17. with just under 1000 detected events with 7 events equal to or above magnitude 3.0 and the largest at mag. 3.7."},{"id":294,"published_at":"2019-12-25T11:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"A lot of activity, but more or less the same through the years since the Bárðarbunga activity."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Steady but little activity. A minor deformation signal in InSar, which needs further consideration. Difficulties with gas measurements. Grímsvatn: Increased activity this year. CO2 measurements has increased this autumn."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Very little activity."},{"volcano_code":"KRA","vona_color_code":"GREEN","vals_level":null,"status_text":"No changes compared to the last years."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor activity. Possibly a minor deformation seen in InSar, but much less than earlier."}],"additional_notes":"An earthquake swarm started in the morning of December 15th and lasted through to the 20th. with more than 1650 detected events with 10 events equal to or above magnitude 3.0 and the largest at mag. 3.7. The swarm was mostly finished by December 20th. On December 17th a long-term natural-hazard monitoring meeting was held at IMO. During the meeting the most active volcanoes were over-viewed with concern to recent earthquake activity, satellite images, river data, gas-measurements and deformation. Here are the main conclusion of the meeting:"},{"id":295,"published_at":"2020-01-01T11:30:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake magnitude 2.5 occurred on the 30. Dec. and it was the largest event in 2019.A few magnitude 1-2 have occurred in the last two weeks."},{"volcano_code":"TEY","vona_color_code":"GREEN","vals_level":null,"status_text":"A small swarm occurred in the 27. and 28. Dec. just north of Þeistareykjabunga all Mag. 1.6 or smaller."}],"additional_notes":""},{"id":296,"published_at":"2020-01-08T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.8 earthquake occurred in the Bárðarbunga caldera at 04:32 the morning of 5th of January. M4.0 followed around 20 minutes later. It was among the largest earthquakes in Bárðarbunga since the eruption in Holuhraun in February 2015, even though several other >M4 earthquakes have occurred around the caldera since then. http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html The moment tensor inversion analysis confirmed the same mechanism as all the other >M4 earthquakes occurred in the caldera since the end of the eruption. The results point toward a possible uplift of the caldera floor (as already stated in previous reports)."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Late morning the 5th of January a M3.2 and M3.1 earthquakes occurred on the Reykjanes ridge, approximately 30km SW of shore."}],"additional_notes":""},{"id":297,"published_at":"2020-01-15T10:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Askja: A seismic swarm started 8th of January close to Herðubreið mountain around 18km NE of Askja Volcano. From 8th to 12th of January around 140 earthquakes were measured there, the largest one M2.2 but majority of them was smaller than M1.0. Katla: 10th of January an M3.0 earthquake was measured in eastern part of Katla caldera. No aftershocks followed in the area."},{"id":298,"published_at":"2020-01-22T10:30:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes (offshore ridge): A seismic swarm was recorded between 18th and 19th of January, some 70 km southwest of Reykjanes volcano, offshore. About 60 earthquakes were recorded, two earthquakes of M4.5 and others were smaller. Swarms are common on the Reykjanes Ridge. Katla: 21st of January a M2.8 earthquake was measured in the southern part of Katla caldera, near cauldron 16. No aftershocks followed in the area."},{"id":299,"published_at":"2020-01-29T13:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M 3.7 on the 22nd of January"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes (offshore ridge): Inflation has been detected in the last few days by Mt. Thorbjorn on the Reykjanes Peninsula, since January 21st. A state of uncertainty has been declared and the aviation color code has been raised to yellow for Reykjanes. The inflation is unusually rapid, around 3-4 mm per day and has accumulated to 3 cm to date, however, the inflation looks to have decreased for the last two days. The inflation is most likely a sign of magma accumulation at a depth of just a few km. If magma accumulation is causing the inflation, the volume is very small, with the first estimate around 1 million cubic meters (0.001km3). An earthquake swarm has been ongoing during the same period, with the largest earthquakes of M3.7 and M3.6 on January 22nd. Last night (29th of January) an earthquake of M3.5 occurred at 04:31 and a M3,2 at 05:00 about 1.5 Km NW of Grindavík. Bárðarbunga: An earthquake of M3.7 occurred on the 22nd of January at 14:25."},{"id":300,"published_at":"2020-02-05T11:30:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes (Svartsengi): In the last week more than 1100 earthquakes have been located around Mt. Thorbjorn on the Reykjanes Peninsula. On the 31st of January two large earthquakes have been detected and felt by most of the population in the area. These two earthquakes, of M4.3 and M3.9 respectively, are the largest earthquakes recorded since the beginning of this unrest (26th of January 2020). Earthquakes of similar size were recorded in this area in 2008, only. The deformation in the area (monitored by GPS real-time data and through interferogram processing) is still ongoing. Three more seismometers and two more GPS stations have been installed in the past week to improve the monitoring of the area. The Aviation color code remains Yellow and the Uncertainty alert level declared by the Civil Protection is still in force. Tomorrow, 6th of February, there will be a Scientific Advisory Board meeting where the most recent data and observations will be discussed to provide an updated interpretation of the ongoing event.The outcome of the meeting will be distributed through the proper channels."},{"id":301,"published_at":"2020-02-12T11:30:00Z","entries":[{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":null,"status_text":"On February 9th a M3.7 earthquake"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes (Svartsengi): In the last week more than 200 earthquakes have been located around Mt. Thorbjorn on the Reykjanes Peninsula. The largest one occurred on the 11th of February and had a magnitude of 3.1. Shortly after a M2.6 earthquake occurred in the same area. An overview of the seismic activity in the Reykjanes area for the last 15 days: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png There are indications of changing patterns in the crustal movements. The earthquake activity is slightly decreased since the beginning of the unrest, but there are still signs of a continuing deformation in the area. The maximum uplift, as measured by the GPS network, has reached about 5 cm. The Aviation color code remains Yellow and the Uncertainty alert level declared by the Civil Protection is still in force. Tomorrow, February 13th, there will be a Scientific Advisory Board meeting where the most recent data and observations will be discussed to provide an updated interpretation of the ongoing event.The outcome of the meeting will be distributed through the proper channels. Hengill: On February 9th an M3.7 was detected just west of the Hengill area. The earthquake was felt in the capital area. A few aftershocks followed in the area. An overview of the seismic activity in the Hengill area for the last 15 days: http://hraun.vedur.is/ja/arg/png/hengill_15d.png"},{"id":302,"published_at":"2020-02-19T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.6 at 05:57 on Saturday February 15th. See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Grímsvötn lake has been collecting water over the past months, with a current volume estimate of 0,3 km3 (data from UoI). It is likely that the water accumulation will continue in the coming months/years increasing the likelihood for a jökulhlaup. It is important to keep monitoring the level of water in the lake as a jökulhlaup might increase the possibility for an eruption due to the sudden pressure release. We see a slow increasing trend in the seismicity when looking to the monthly rate of earthquakes. See: http://hraun.vedur.is/ja/vatnajokulsvoktun/grf_uppsafn.html Gas measurements campaigns performed since 2011 might suggest that the gas released along the caldera rim is moving toward more magmatic composition. A multigas is running in Grimsfjall (a nunatak S Grímsvötn volcano) and is occasionally measuring peaks in CO2. SO2 and H2S have never been measured. Overflight surveys performed by colleagues at UoI as well as satellite observations indicate no major changes but some increase in geothermal activity appears to have occurred over the last year but this change is has not been quantified. Bárðarbunga: On February 15th at 05:57 an earthquake of M3.6 occurred in the N rim of the Bárðarbunga caldera. No aftershocks followed and there was no volcanic tremor. Few smaller earthquakes have been detected in the area the last few days all below M2.0. Repeated gravity measurements performed by colleagues at UoI suggest an upward movement of several meters of the caldera floor since 2015. A possible uplift of the caldera floor had been noted from the analysis of the seismic wave forms of the earthquakes along the caldera rim. Overflights surveys performed by colleagues at UoI suggest that the geothermal activity as a whole has not declined and it has been increasing in connection to the cauldron on the NE caldera rim."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes (Svartsengi): In the last week more than 200 earthquakes have been located around Mt. Thorbjorn on the Reykjanes Peninsula. The largest one occurred on the 11th of February and had a magnitude of 3.1. Shortly after a M2.6 earthquake occurred in the same area. An overview of the seismic activity in the Reykjanes area for the last 15 days: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png There are indications of changing patterns in the crustal movements. The earthquake activity is slightly decreased since the beginning of the unrest, but there are still signs of a continuing deformation in the area. The maximum uplift, as measured by the GPS network, has reached about 5 cm. The Aviation color code remains Yellow and the Uncertainty alert level declared by the Civil Protection is still in force. Tomorrow, February 20th, there will be a Scientific Advisory Board meeting where the most recent data and observations will be discussed to provide an updated interpretation of the ongoing event.The outcome of the meeting will be distributed through the proper channels. On February 15th an earthquake swarm in Reykjanestá began. Since then approx. 200 earthquakes have been located. All smaller than M3.0. On the 11th of February a long-term monitoring meeting has been held at IMO together with colleagues at the University of Iceland. The key points are summarized below:"},{"id":303,"published_at":"2020-02-26T11:30:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"As already stated in the previous VWR report, Grímsvötn volcano has been showing an increased level of activty over the past months. The monthly earthquake rate analysis shows that for two months in a row the threshold of 23 events has been exeeded, as visible at the link: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"The earthquake activity by Mt. Thorbjorn has significantly decreased in the last days. 60 earthquakes have been located around Mt. Thorbjorn on the Reykjanes Peninsula during last week and they were all below M2.0. On February 15th an earthquake swarm on the southwestern tip of the Reykjanes peninsula began. Since then approx. 500 earthquakes have been located. In the last week more than 250 earthquakes have been located, the largest one occurred on the 22nd of February and had a magnitude of 3.1. An overview of the seismic activity in the Reykjanes peninsula for the last 15 days is accesible at: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png On the 25th of February geoscientists joined a Scientific Advisory Board meeting and reviewed the current status of the unrest at Mt. Thorbjörn that started in late January this year in the Reykjanes peninsula. Last week, gas measurements were performed in the Eldvörp area and they revealed dangerous depletion of oxygen concentration within a lava cave. In general, it is considered dangerous to enter in lava caves within geothermal areas and people are asked to be very cautious when approaching such places. It is unclear if these unsafe conditions are new or not, since gas measurements prior to the unrest do not exist. In the last days the seismic activity in Þorbjörn has decreased significantly. GPS and InSAR data do not show on-going inflation in the area, suggesting that for now the magma inflow has stopped. There are indications of a small deflation signal from mid-February, but the scientists consider it too early for a proper interpretation. In light of this, it is considered very important to continue to monitor the area closely. The Uncertainty level issued by the Civil Protection on the 26th of January is still in force. The Icelandic Meteorological Office decided to move the Aviation Color Code for Reykjanes back to Green as an eruption, potentially impacting the aviation, is considered less likely. The monitoring network in the area has been improved over the last weeks and this will allow the IMO to quickly detect changes occurring in the volcanic system that might indicate an increase in the activity. The next Scientific Advisory Board meeting will be on the 12th of March. The meeting was attended by scientists from the Icelandic Meteorological Office, the Institute of Earth Sciences at the University, together with representatives from the Civil Protection Department of the National Commissioner of Police, HS-Orka, ISAVIA and the Environment Agency."}],"additional_notes":""},{"id":304,"published_at":"2020-03-04T11:30:00Z","entries":[{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"At noon on 3rd of March a CO2 peak was measured at the top of Hekla. Concentration of H2S, SO2 and CO2 are measured there every six hours. Concentration of CO2 reached up to 10% in a single measurement. That is the highest measurements observed since the monitoring instrument is running. Since the peak was measured the concentration of CO2 has ranged from 1 to 6 %, which is considered a normal value for Hekla volcano. No other unusual geophysical signals have been observed recently."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"An M3.2 earthquake occurred 3rd of March by Kleifarvatn. IMO received few felt reports from the capital area. Around 30 smaller earthquakes have been measured in the area since 1st of March. An earthquake of this magnitude (>M3.0) last occurred there in August 2019"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Þorbjörn: The earthquake activity by Mt. Þorbjörn is still decreasing. Around 40 earthquakes were recorded there last week compared to 60 in the week before. All the earthquakes measured last week were below M2.0. The most recent GPS and InSAR measurements show that the deformation in the area is either very little or has stopped. As stated in the last report hazardous depletion of oxygen concentration was measured two weeks ago in a cave in the Eldvörp area, few km west of Mt. Þorbjörn. However, the most recent observation showed safe conditions in the cave. That shows that the conditions there are rapidly changing. It is still unclear if these unsafe conditions are new or not, since gas measurements prior to the unrest do not exist. Gas measurements were last carried out a week ago in Eldvörp area and then no significant changes were detected compared to the week prior to last week. New measurements will be performed as soon as weather conditions will allow. SW-Reykjanes: The earthquake swarm that began 15th of February on the SW tip of the Reykjanes peninsula is still ongoing at a similar rate. Last week around 270 earthquakes were detected in the area and around 800 earthquakes since the swarm began. No earthquakes exceeded M3.0 last week so the M3.1 earthquake on 22nd of February is still the largest in the swarm. An overview of the seismic activity in the Reykjanes peninsula for the last 15 days is accesible at: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The Uncertainty level issued by the Civil Protection on the 26th of January is still in force. The next Scientific Advisory Board meeting will be on the 12th of March."}],"additional_notes":""},{"id":305,"published_at":"2020-03-11T11:30:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of magnitude 3.1 was recorded in Grímsvötn on the 6th of March. The last earthquake of similar size occurred in November 2018 in the same location (eastern part of the caldera). No other unusual activity has been recorded last week and an overview of the seismicity is available at the link: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"No unusual CO2 measurements have been detected in Hekla last week."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Þorbjörn: The earthquake activity by Mt. Þorbjörn is still decreasing. Around 40 earthquakes were recorded there last week as in the previous week. All the earthquakes measured last week were below M2.5. The most recent GPS and InSAR measurements show that the deformation in the area is either very little or has stopped. Gas measurements were last carried out a week ago in Eldvörp area and then no significant changes were detected compared to the week prior to last week. New measurements will be performed as soon as weather conditions will allow. SW-Reykjanes: The earthquake swarm that began 15th of February on the SW tip of the Reykjanes peninsula had over 500 earthquakes last week. Since the last few days the activity is significantly reduced. Only around 10 earthquakes have been detected since the 8th of March. An overview of the seismic activity in the Reykjanes peninsula for the last 15 days is accesible at: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The Uncertainty level issued by the Civil Protection on the 26th of January is still in force. Due to the COV19 the SAB meeting has been rescheduled."}],"additional_notes":""},{"id":306,"published_at":"2020-03-18T11:30:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"After the earthquake of magnitude 3.1 recorded on the 6th of March, the seismicity in Grímsvötn has been quite low with only two earthquakes (both below M1.5) occurred in the last week. An overview of the seismicity is available at the link: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Þorbjörn: On the 12th of March an earthquake of magnitude 4.6 occurred at about 3.5 km NE of Mt. Þorbjörn. A sequence of aftershocks lasted for a couple of days featuring eight earthquakes > M3 and about eighty earthquakes with magnitudes between 2 and 3. In the area a total of 900 earthquakes have been detected last week. Scientists from the Icelandic Meteorological Office, University of Iceland and ISOR met yesterday (18.03) to review the latest data. From the most recent crustal deformation measurements, it is now clear that the inflation that occurred in Þorbjörn in January-February has started again. This is confirmed by both GPS data and satellite observations. The deformation is occurring in the same location as before, but at a slower rate. The uplift that started in January halted in the end of February just temporarily. The newest data show that since the beginning of March the uplift is of about 20 mm. As already stated in the first phase of this unrest, the most likely explanation is magma inflow at a depth of about 5 km. The process ongoing at Reykjanes-Svartsengi might be a long-term event that will evolve week after week and that IMO keeps monitoring closely. SW-Reykjanes: The earthquake swarm that began on the 15th of February in the SW tip of the Reykjanes peninsula slowly died out over the last week. However today (18.03) at 10.32, an earthquake of M4.2 just occurred one km offshore west of the peninsula. Few more aftershocks are recorded. An overview of the seismic activity in the Reykjanes peninsula for the last 15 days is accessible at the link: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The Uncertainty level issued by the Civil Protection on the 26th of January is still in force. Due to the COV19 the SAB meeting has been rescheduled."}],"additional_notes":""},{"id":307,"published_at":"2020-03-25T11:30:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Six earthquakes occurred last week in Grímsvötn. All of them below M2. The seismic activity for the month of March is already above the average background, as already happended for the previous two months. The overview of the seismicity is shown at the link: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 20th of March a seismic swarm occurred in Krýsuvík volcanic system and lasted few hours. The largest earthquake was M3 and occurred in Kleifarvatn lake. Few aftershocks followed."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"More than 1000 earthquakes have been detected in the entire Reykjanes peninsula over the last week. Þorbjörn: About 840 earthquakes occurred around Þorbjörn. The largest one occurred today (25.03) at 09:44 UTC. It had a magnitude of M3.4 and was located about one km east Mt. Þorbjörn. The deformation in the area is still on-going and it is evolving at similar rate as the previous week. The inflation is confirmed by both GPS data and InSAR processing. The deformation is occurring in the same location as before, but slower than in January/February. The process ongoing at Reykjanes-Svartsengi might be a long-term event that will evolve week after week and that IMO keeps monitoring closely. SW-Reykjanes: The beginning of this week has been characterized by one hundred of earthquakes. The largest earthquake had a magnitude of 2.5 and occurred on the 18th of March. Since the 2nd of March no more earthquakes have been recorded in the area. An overview of the seismic activity in the Reykjanes peninsula for the last 15 days is accessible at the link: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png On the 18th of March, the aviation color code for Reykjanes volcano was changed from GREEN to YELLOW. The Uncertainty level issued by the Civil Protection on the 26th of January is still in force. The next SAB meeting will be on the 25th of March."}],"additional_notes":""},{"id":308,"published_at":"2020-04-01T11:30:00Z","entries":[{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"14 earthquakes were recorded in Krýsuvík last week. Most of the activity was located within the Kleifarvatn lake area. The largest earthquake had a M2.3 on the 28th of March. Recent geochemical measurements performed in Krýsuvík revealed an increase in the concentration of H2S. This might be seen as a response to the recent increased seismic activity in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"A seismic swarm occurred in Eldey on the 28th of March. A total of 120 earthquakes have been recorded in the area. Five earthquakes larger than M3 have been measured. Few more events followed on the following day. Seismic swarms in this region are not unusual."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Eleven earthquakes occurred last week in Grímsvötn. All of them below M2. The seismic activity for the month of March, just ended, is well above the average background as already happended for the previous two months. The overview of the seismicity is shown at the link: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html"}],"additional_notes":"Reykjanes peninsula and Reykjanes ridge: In the last week, about 1000 earthquakes have been detected within an area including Reykjanes peninsula and Reykjanes ridge. On the 26th of March a SAB meeting was held to discuss the ongoing unrest in the Reykjanes peninsula. Scientists from IMO, University of Iceland, ISOR and representatives from Civil Protection, ISAVIA and HS-Orka, reviewed the latest monitoring data for this area. It results that more the 6000 earthquakes have been recorded since the beginning of the volcanic unrest in the peninsula, revealing that this is the largest seismic crisis ever recorded in this part of the country since the digital monitoring started in 1991. The seismicity is overall episodic across the three main volcanic systems present in the area (i.e. Eldey, Reykjanes-Svartsengi and Krýsuvík). The deformation, as confirmed by GPS and InSAR images, is still ongoing in the area around Þorbjörn and the total vertical displacement, since January 2020, is now 70-80 mm. However, the deformation rate over the last few weeks is occurring at a lower rate than in January-February. Deformation modelling results suggest that a second intrusion is occurring at a depth of about 3-4 km in an area west of Þorbjörn very close to the one occurred in January-February. Recent GPS (continuous and campaign measurements) reveal a small deformation pattern detectable over a wider region well beyond the Þorbjörn area. There is still uncertainty in interpreting these data and more work is needed in understanding the underlying processes occurring along the Reykjanes peninsula and Reykjanes ridge. The Uncertainty level issued by the Civil Protection on the 26th of January is still in force as well as the yellow aviation color code for Reykjanes-Svartsengi volcanic system. The next SAB meeting will be on the 8th of April, if there will be no changes. Þorbjörn: About 770 earthquakes occurred around Þorbjörn. Two earthquakes larger than M3 occurred today (01.04) at 05:09 and 05:43 UTC. They were M3.01 and M3.04, respectively and were both located about one km east Mt. Þorbjörn. Geochemical measurements did not detected any significant changes in the gas composition. SW-Reykjanes: Only 11 earthquakes were recorded in the tip of Reykjanes peninsula last week. The largest event had M2.6 and occurred on the 31th of March. Geochemical measurements did not detected any significant changes in the gas composition. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"id":309,"published_at":"2020-04-08T11:30:00Z","entries":[{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 4th of April a seismic sequence occurred in this area and 35 earthquakes have been recorded. The largest earthquake had a M3.3. Seismic swarms in this region are not unusual. Additional information about the Eldey volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=ELD"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Low seismic activity has been recorded in Grímsvötn last week. The overview of the seismicity is shown at the link: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html Additional information about the Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"20 earthquakes were recorded in Krýsuvík last week. Most of the activity was located within the Kleifarvatn lake area. The largest earthquake had a M1.5. Recent geochemical measurements performed in Krýsuvík revealed an increase in the concentration of H2S. This might be seen as a response to the recent increased seismic activity in the area. Additional information about the Krýsuvík volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula and Reykjanes ridge: In the last week, about 1100 earthquakes have been detected within an area including Reykjanes peninsula and Reykjanes ridge. The deformation in the area around Þorbjörn is still ongoing and the total vertical displacement, since January 2020, is now about 90 mm. The deformation modelling results indicate that the current inflation is due to a second intrusion that started in March at a depth of about 3-4 km in an area west of Þorbjörn very close to the one occurred in January-February. There are also indications of a deeper source inflating in the western part of the Reykjanes peninsula. Both continuous and campaign GPS measurements (in collaboration with the University of Iceland) were necessary to identify this signal and constrain the magma body at a depth of 8-13 km. The entire Reykjanes peninsula, including three of the volcanic systems belonging to this area, is currently experiencing an important volcano-tectonic reactivation. The Uncertainty level issued by the Civil Protection on the 26th of January is still in force as well as the yellow aviation color code for Reykjanes-Svartsengi volcanic system. The next SAB meeting will be held later today. Þorbjörn: About 780 earthquakes occurred around Þorbjörn. The largest earthquake was a M3.1 occurred on the 01.04 at about two km NNE Mt. Þorbjörn. Geochemical measurements did not detected any significant changes in the gas composition. SW-Reykjanes: Very few earthquakes were recorded in the western part of Reykjanes peninsula last week. All of them had a magnitude below M1.6. Geochemical measurements did not detected any significant changes in the gas composition. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":310,"published_at":"2020-04-15T11:30:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"23 earthquakes in total have been detected around Bárðarbunga caldera last week. The largest one had magnitude M3.2 and occurred on the 12th of April on the southeast of the caldera rim. Since the end of the eruption in February 2015, Bárðarbunga volcano experiences several earthquakes of magnitude above M3 and M4 as shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"12 earthquakes have been recorded in Eldey all of them smaller than M2.1. Additional information about the Eldey volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=ELD"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"8 earthquakes have been recorded in Grímsvötn last week. The largest one had a M2.0 and occurred on the 10th of April. Already 9 earthquakes above M0.8 have been recorded in this area since the beginning of the month as shown here:: http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html Additional information about the Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"Two very small earthquakes were detected in Krýsuvík last week. Recent geochemical measurements performed in Krýsuvík revealed an increase in the concentration of H2S. This might be seen as a response to the recent increased seismic activity in the area. Additional information about the Krýsuvík volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula and Reykjanes ridge: In the last week, about 740 earthquakes have been detected within an area including Reykjanes peninsula and Reykjanes ridge. The deformation in the area around Þorbjörn is still ongoing (as confirmed by recent GPS and InSAR image processing) and the total vertical displacement, since January 2020, is about 10 cm. There are currently not clear signs of inflation in the Western area of the peninsula, where a magma accumulation at 8-13 km depth was identified last week. This suggests that either the inflation at depth has temporarily halted or the signal is too small to be detected. The entire Reykjanes peninsula, including three of the volcanic systems belonging to this area, is still experiencing an important volcano-tectonic reactivation. The Uncertainty level issued by the Civil Protection on the 26th of January is still in force as well as the yellow aviation color code for Reykjanes-Svartsengi volcanic system. Þorbjörn: About 755 earthquakes occurred around Þorbjörn. The largest earthquake was a M3.2 occurred on the 11.04 at about three km W Mt. Þorbjörn. Geochemical measurements did not detected any significant changes in the gas composition. SW-Reykjanes: Only seven earthquakes were recorded in the western part of Reykjanes peninsula last week. All of them below magnitude M1.0. Geochemical measurements did not detected any significant changes in the gas composition. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":311,"published_at":"2020-04-22T10:45:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.8 earthquake occured on the NE rim of Bárðarbunga caldera on 20th of April. Last time an earthquake of similar magnitude occured in Bárðarbunga caldera was on 5th of January 2020. In total nearly 40 earthquakes occured in and around the caldera this week, most of them below M1.0. In addition to that, around 25 deeper earthquakes were located E of the caldera. Since the end of the eruption in February 2015, Bárðarbunga volcano experiences several earthquakes of magnitude above M3 and M4 as shown here: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html. Indications that magma inflow to the Bárðarbunga volcanic system started again were detected quite soon after the eruption ended in 2015. Deeper earthquakes have occurred regularly east of the caldera, with episodes of slightly elevated activity like this week. That might be indications of inflow of magma at depth beneath the volcanic system. Additional information about the Bárðarbunga volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=BAR"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula In the last week, about 330 earthquakes were detected on the Reykjanes peninsula. That is considerably fewer earthquakes compared to the week before when they were around 740. The deformation in the area around Þorbjörn is still ongoing, but there are signals indicating that it is slowing down (as confirmed by recent GPS and InSAR image processing). In the western area of the peninsula, where a magma accumulation at 8-13 km depth was identified recently, a small changes in deformation are being detected. That could be indications of a deeper source of magma but more data is needed to interpret that further. The entire Reykjanes peninsula, including three of the volcanic systems belonging to this area, is still experiencing an important volcano-tectonic reactivation. The Uncertainty level issued by the Civil Protection on the 26th of January is still in force as well as the yellow aviation color code for Reykjanes-Svartsengi volcanic system. Next meeting of Civil Protection‘s Scientific Advisory Board is scheduled on 30th of April. Þorbjörn: Nearly 300 earthquakes occurred around Þorbjörn this week, which is fewer than last week when they were around 780. The two largest earthquakes this week were M2.3 and occurred 1.5 km NE and 2 km SE of Þorbjörn. Geochemical measurements in the area did not detect any significant changes in the gas composition. SW-Reykjanes: Thirteen earthquakes were recorded in the western part of Reykjanes peninsula last week. The largest earthquake was M2.1 on 19th of April. Geochemical measurements did not detect any significant changes in the gas composition. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":312,"published_at":"2020-04-29T10:45:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Only 8 earthquakes have been detected within the Bárðarbunga caldera last week. A sequence of deep pulses occurred at about 10 km SE the caldera rim for a total of about 30 earthquakes. This area is considered to be active in receiving new magma from depth and it occasionally shows increase in the seismicity."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula and Reykjanes ridge: In the last week, about 270 earthquakes have been detected within an area including Reykjanes peninsula and Reykjanes ridge. GPS data show that the deformation in the area around Þorbjörn has declined since mid-April in line with decreased seismicity. The second intrusion at Þorbjörn started in March has caused a total uplift up to 50 mm in the area. There are currently very small signs of ongoing deformation in the Western area of the peninsula, where an additional source was identified between the 15 of February to the 7 of March. This may suggest a deep pressure connection between the volcanic systems (Svartsengi and Reykjanes). The volcano-tectonic activity, which commenced in January this year, is still ongoing in the Reykjanes peninsula. The Uncertainty level issued by the Civil Protection on the 26th of January is still in force as well as the yellow aviation color code for Reykjanes-Svartsengi volcanic system. A Scientific Advisory Board meeting will be held on the 30th of April. Þorbjörn: About 190 earthquakes occurred around Þorbjörn last week. All of them had magnitude below M1.6, with the majority being smaller than M1.0. Radon gas measurements in the Svartsengi area revealed a positive correlation between Radon gas concentration values and seismicity in the area during the period of the second that could be explained by the fracturing of the crust. No other significant changes can be reported from the geochemical measurements. SW-Reykjanes: Around 30 earthquakes were recorded in the western part of Reykjanes peninsula last week. The majority of them were below magnitude M1.0. Geochemical measurements did not detected any significant changes in the gas composition. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":313,"published_at":"2020-05-06T10:45:00Z","entries":[{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula and Reykjanes ridge: A Scientific Advisory Board met on 30th of April to discuss and review the current activity in Reykjanes Peninsula. The meeting was attended by scientists from the Icelandic Meteorological Office, University of Iceland - Earth Sciences and ÍSOR, and also representatives from the Civil Protection, ISAVIA-ANS and Police Dept of the South-Iceland. In the beginning of April the uplift in Þorbjörn decreased and, in the second part of the month, it stopped. The area around Þorbjörn is now most likely recovering after the large induced stress, and the injected magma is cooling down and contracting. Along with reduced deformation, seismic activity has decreased significantly. These data indicate that the injection of magma beneath Þorbjörn has stopped and this second phase of uplift due to magma intrusion can be considered closed. Even though there are no observations of ongoing uplift around Þorbjörn, there are indications of minor deformation over a larger area. The current observations and the course of events over the last several months suggest that there is an active long-term process ongoing in the area. The possibility of renewed activity in the near future at Þorbjörn, Reykjanes or elsewhere on the Reykjanes Peninsula cannot be discarded. In light of the current reduced activity in the area the color code for aviation is moved back from YELLOW to GREEN. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":314,"published_at":"2020-05-13T10:45:00Z","entries":[{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula: About 50 earthquakes have been detected around Þorbjörn last week, all of them with a magnitude below M1. No significant changes in the deformation are detected in this area. Geochemical monitoring did not show any significant changes over the last week. The South-western part of the peninsula has been quite active in the past week with about 250 earthquakes detected. The largest event had a magnitude M2.2 and occurred on the 9th of May. However, over the last few days the seismicity has been slowly decreasing. A subtle sign of deformation is detectable in this area since mid-April and it might indicate the presence of magma body accumulation at depth. Geochemical monitoring did not show any significant changes over the last few weeks. The current observations and the course of events over the last several months suggest that there is an active long-term process ongoing in the area. The possibility of renewed activity in the near future at Þorbjörn, Reykjanes or elsewhere on the Reykjanes Peninsula cannot be discarded. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":315,"published_at":"2020-05-20T10:45:00Z","entries":[{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula: About 30 earthquakes have been detected around Þorbjörn last week, most of them with a magnitude below M1. No significant changes in the deformation are detected in this area. Geochemical monitoring did not show any significant changes over the last week. The South-western part of the peninsula has been quite active in the past week with about 260 earthquakes detected. The largest event had a magnitude M2.1 and occurred on the 18th of May, when a small swarm of about 100 earthquakes occurred. A subtle sign of deformation is detectable in this area since mid-April and it might indicate the presence of magma body accumulation at depth. Geochemical monitoring did not show any significant changes over the last few weeks. The current observations and the course of events over the last several months suggest that there is an active long-term process ongoing in the area. The possibility of renewed activity in the near future at Þorbjörn, Reykjanes or elsewhere on the Reykjanes Peninsula cannot be discarded. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":316,"published_at":"2020-05-27T12:30:00Z","entries":[{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula: About 250 earthquakes have been detected in the Reykjanes peninsula in the past week. The largest event had a magnitude of 2.08 and it was offshore 1 km west from the tip of the peninsula. Overall, the seismicity in the Reykjanes peninsula has been decreasing since mid-April and most of the earthquakes are small with magnitudes below 1. New data were acquired/processed yesterday afternoon (26.05), which include InSAR, GPS and radon measurements. These new observations indicate subtle sign of slow re-inflation in the vicinity of Þorbjörn. A longer time series of data is needed to better constrain the ongoing process and evaluate the associated hazards. As already stated previously, the current observations and the course of events over the last several months suggest that there is an active (and potentially long-term) process ongoing in the area, with the possibility of continued episodic activity in the near future elsewhere on the Reykjanes Peninsula. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":317,"published_at":"2020-06-03T10:45:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Only three earthquakes were detected in Bárðarbunga last week. One of those had magnitude 3.5 and occurred on 30 May. No aftershocks followed. Since the end of the eruption, in February 2015, the volcano features regularly earthquakes larger than M3. See it at: http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes/Svartsengi: Since 30 May the seismic activity around Mt. Thornjörn increased again. Over the last four days more than 430 earthquakes have been detected in the area. The largest event had a magnitude of 2.7 and it was located 1.5 km NE of the town of Grindavík. This renewed seismic activity in Svartsengi corroborates the indications of a new magma intrusion, occurring at depth nearby Thorbjörn. This intrusion is the third one occurring in this area since the beginning of then unrest at Reykjanes/Svartensgi this year and it was already identified by deformation and geochemical observations, as reported last week. As already stated previously, the current observations and the course of events over the last several months suggest that there is an active (and potentially long-term) process ongoing in the area, with the possibility of continued episodic activity in the near future elsewhere on the Reykjanes Peninsula. A Scientific Advisory Board meeting will be held next week to review all the available monitoring data and to provide an updated assessment of the ongoing process and its associated hazards. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":318,"published_at":"2020-06-10T11:30:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes/Svartsengi: Since 30th of May the seismic activity around Mt. Thorbjörn has increased again. Around 1500 earthquakes have been located in the Reykjanes-Svartsengi volcanic system since then and thereof almost 900 last week. Majority of the earthquakes are located just E of Mt. Thorbjörn. Largest earthquake of last week was M2.6 and was located 1 km E of Mt. Thorbjörn. This renewed seismic activity in Svartsengi supports the indications of a new magma intrusion, occurring at depth nearby Thorbjörn. This intrusion is the third one occurring in this area since the beginning of the unrest at Reykjanes-Svartengi this year and it was already identified by deformation and geochemical observations, as previously reported. According to new modelling results this intrusion appears to be in a similar location as the previous two intrusions and at around 4 km depth. Weekly gas measurements in the area showed lower concentration of Radon and CO2 . As already stated previously, the current observations and the course of events over the last several months suggest that there is an active (and potentially long-term) process ongoing in the area, with the possibility of continued episodic activity in the near future elsewhere on the Reykjanes Peninsula. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY Grímsvötn: An annual spring trip to Grímsvötn was carried out last week by staff member of the IMO. During this trip gas measurements were conducted in the SW-part of the caldera, where the 2011 eruption took place. Gas has been measured annually on this location since the last three years. The results this year showed the following results: Concentration of H2 is five times higher than last year. Concentration of SO2 was measured which has never been detected before. Concentration of H2S and CO2 were above values that have been measured until now. These measurements were conducted two days of the week long trip with few days apart and both measurements confirm the detection and increased concentration of these gases in Grímsvötn. H2 and SO2 are magmatic gases and a strong indicator of magma at shallow depth. An additional GPS instrument which streams real-time data to the IMO has been installed in the caldera. This instrument could possibly detect changes of the water level in the caldera lake and give an early warning for a glacial flood from Grímsvötn. There are examples that previous eruption have been triggered by a flood from the caldera lake. These are very important data that confirm the trend we have been seeing, until now, of a reactivation of Grímsvötn volcano. Currently, we do not see an escalation in the monitoring parameters such as seismicity and deformation, but we recognize the relevance of these new observations in the context of a potential eruption of Grímsvötn in the near future. Additional information about the Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV -------- A Scientific Advisory Board meeting will be held in the afternoon today to review all the available monitoring data for Þorbjörn and Grímsvötn and to provide an updated assessment of the ongoing process and its associated hazards."},{"id":319,"published_at":"2020-06-17T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of M3.4 occurred in the southern part of the caldera on 14 June. Very few earthquakes followed."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"11 earthquakes were detected in Grímsvötn last week, all of them below M1.5. Overall, the recent seismicity is not unusual when it is compared with the weekly and monthly rate thresholds. However, the status of Grímsvötn volcano has been changing over the past months. Evidences of increased geothermal activity, deformation level comparable to that prior the 2011 eruption, the recent detection of magmatic gases in the caldera (SO2 and H2) suggest that the volcano is getting close to a pre-eruption condition. The caldera lake has been accumulating water and its current level suggests that a glacial flood might occur over the next weeks/months. A possible scenario is that the pressure reduction, induced on the unstable volcanic system by the water drainage, might facilitate the magma raise and trigger an eruption in Grímsvötn. To discuss further the current status of Grimsvötn volcano and the latest observations, the Scientific Advisory Board will meet again on June 18. See the recent news here: https://en.vedur.is/about-imo/news/evidences-that-grimsvotn-volcano-is-getting-ready-for-the-next-eruption Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes/Svartsengi: More than 1130 earthquakes have been detected around Thorbjörn last week. Most of the activity occurred over the weekend (13-14 June) when the largest earthquake was detected. It had M3.5 and was located at about 2 km north of the town of Grindavík. As previously reported, in mid-May deformation data (GPS and InSAR measurements) started to show again signs of inflation, suggesting that a third intrusion since the beginning of this year is occurring west of Thorbjörn. The intrusion began around mid of May but the seismic activity started to increase toward the end of the month (30 May). Results of micro-gravity measurements conducted by colleagues at ISOR confirm the presence of intruded magma at depth. Gas measurements at two sites near the area of intrusion are done regularly. Occasional changes in the gas concentrations are observed but how this is linked to the on-going process in the peninsula is still unclear and needs further investigations. A Scientific Advisory Board meeting was held on the 10th of June and the outcomes of the meeting are avaialable here: https://en.vedur.is/about-imo/news/evidences-that-grimsvotn-volcano-is-getting-ready-for-the-next-eruption An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":320,"published_at":"2020-06-24T15:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Very few earthquakes were detected in Grímsvötn and no unusual observations have been registered in the past week. See the recent news here: https://en.vedur.is/about-imo/news/evidences-that-grimsvotn-volcano-is-getting-ready-for-the-next-eruption Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Tjörnes Fracture Zone: An earthquake swarm in the Tjörnes Fracture Zone began on 19th of June. More than 5000 earthquakes have been detected so far, three of which measured greater than magnitude 5. The largest was on Sunday at 19:07 of M5.8 around 30 km NNE of Siglufjörður. Other earthquakes above M5.0 were M5.6 and M5.4 and were located around 20 km NE of Siglufjörður. The seismic swarm has tectonic origin and it is still ongoing. Slight decrease in activity occurred last night but around 700 earthquakes were detected there since midnight, mainly smaller than M3.0. An earthquake of M4.0 was measured at 06:59 this morning. At 11:51 an earthquake of M4.2 was measured in the area. Yesterday more than 900 earthquakes were detected, the largest of which measured M3.4 at 10:15 about 30 km NNE of Siglufjördur. Seismic activity is still ongoing and there are chances of more earthquakes of this magnitude occurring in the area."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula: More than 240 earthquakes have been detected in the Reykjanes peninsula last week. The seismic activity clustered around three main spots: Sirfell (west of the peninsula), Eldvörp and Thorbjörn. The largest earthquake was M2.3 and was located in the town of Grindavík. As confirmed by GPS data, the third inflation of magma near Thorbjörn is still on-going but possibly at a lower rate than before. Recent radon measurements reveal a gradual decrease in concentrations. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":321,"published_at":"2020-07-01T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Only one M1.2 earthquake was detected in Grímsvötn last week. The real-time data from the GPS station, located on ice shelf in the caldera, shows a constant increasing trend indicating that water continues to accumulate in the subglacial lake of Grímsvötn. No unusual observations have been registered in the past week. At the last meeting with the Civil Protection the following scenarios have been considered for Grímsvötn volcano: A flood will occur in the Grimsvötn caldera but will not be followed by an eruption (like 2010). A flood will occur in the Grimsvötn caldera and an eruption will follow probably in 5 to 8 days after the start of the flood. This eruption will most likely be small to medium in size and the area of ashfall will be fairly contained (similar to 2004 eruption). An eruption will occur before the flood will happen. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Tjörnes Fracture Zone: The earthquake swarm started on the 19 June in the Tjörnes Fracture Zone is still on-going and around 9000 earthquakes have been detected since its beginning. The swarm comprises three earthquakes with magnitude greater than 5 which occurred in the week 15-24 June. In the past week about 15 earthquakes had magnitude above M3 and three were above M4. The seismic swarm has likely tectonic origin and there are still chances of large earthquakes occurring in the area."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula: The automatic system detected more than 1000 events in the Reykjanes peninsula last week and about 220 were manually checked. The largest earthquake was M2.3 and it was located in the south west part of the peninsula. The seismic activity clustered around five main spots: Sirfell (west of the peninsula), Eldvörp, Thorbjörn, Hagafell and Fagradalsfjall (east of Thorbjörn). The latest GPS data confirm that the third inflation of magma near Thorbjörn is still on-going but possibly at a lower rate than before. Recent radon measurements do not reveal significant changes from the previous week. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY Reykjanes ridge: On 25 June a small sequence of earthquakes occurred in the Reykjanes ridge and it was mainly concentrated along the Eldey volcanic system. The largest earthquake had magnitude 2.6. Additional information about the Eldey volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=ELD"},{"id":322,"published_at":"2020-07-08T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Only three earthquakes were detected in Grímsvötn last week confirming a low level of seismicity since mid-June. The real-time data from the GPS station, located on ice shelf in the caldera, shows a slight increase in the water accumulation rate, partly due to a general acceleration in the melting of ice due to the seasonal raise of ambient temperature. Since the GPS station has been installed a total height increase of about 1 meter has been registered. No additional unusual observations have been registered in the past week. Given the possibility of the occurrence of a flood, with a possible triggering for an eruption, IMO keeps monitoring the area closely. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Small leakage of geothermal water is ongoing"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Note: Due to load on the system due to the ongoing activity in Tjörnes, N-Iceland, the accuracy in detecting earthquakes in the country might be compromised. Reykjanes peninsula: The automatic system detected more than 1000 events in the Reykjanes peninsula last week and about 270 were manually checked. The largest earthquake was M2.9 and it was located at about 1.5 km north of Grindavík town. The seismic activity clustered mainly around Sýrfell (west of the peninsula), Thorbjörn and the area east of Thorbjörn. The data from GPS stations in the Thorbjörn area suggest that the third intrusion, which started in mid-May, has temporarily stopped. Recent radon measurements do not reveal significant changes from the previous week. Overall the seismic activity in the area is still elevated and there are no clear signs of a decreasing trend. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY Reykjanes ridge: No relevant activity occurred in the Reykjanes ridge last week. Additional information about the Eldey volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=ELD\nKatla:\nOver the past two weeks Katla has been showing a slight increase in the seismicity, with about 14 manually checked earthquakes occurred in the last seven days. The largest earthquake had a magnitude of M2.9 and was located close to the cauldrons 10 and 11 in the eastern part of the caldera. Recent measurements and observations of the glacial river Múlakvísl confirm that a leakage of geothermal water is ongoing, possibly originating from the two seismically active cauldrons. Regular small floods and geothermal leakages in Múlakvísl river are not unusual and they often occur in this period of the year. An overview of the seismic activity for Katla volcano is available here: http://hraun.vedur.is/ja/Katla/katla_qu_trends.html Additional information about Katla volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=KAT Tjörnes Fracture Zone: About 560 earthquakes have been manually checked in the past week. Of them six had magnitude above M3. Most of the seismicity is still located NE of Siglufjörður. Very few earthquakes occurred in the Öxarfjörður area. The earthquake swarm that started on the 19 June in the Tjörnes Fracture Zone is still on-going and around 10000 earthquakes have been automatically detected since its beginning. The swarm comprises three earthquakes with magnitude greater than 5 which occurred in the week 15-24 June. The seismic swarm has likely tectonic origin and there are still chances of large earthquakes occurring in the area."},{"id":323,"published_at":"2020-07-15T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes with magnitude above 3 occurred on 13 and 14 July. They were a M3.0 and M3.6, respectively."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Only one earthquake was detected in Grímsvötn last week confirming a low level of seismicity since mid-June. In the beginning of July a change in the water accumulation rate under Grímsvötn occurred, with an accelerated trend confirmed since. A total of 1.4 meters has been gained by the water level height in the subglacial lake since the installation of GPS in Grímsvötn (occurred on 6 June). No unusual detection of gases in Grimsfjall so far. Many geophysical parameters suggest that Grímsvötn volcano is preparing for a new eruption, but the timeline is very hard to define. Over the summer time the scenario might escalate quickly. IMO keeps monitoring the area closely. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"A minor seismicity is recorded for Katla over the past week with only four earthquakes below M1. The small geothermal water leakage detected last week is considered now over and there are currently no signs of ongoing water draining. An overview of the seismic activity for Katla volcano is available here: http://hraun.vedur.is/ja/Katla/katla_qu_trends.html Additional information about Katla volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=KAT Tjörnes Fracture Zone: About 900 earthquakes have been automatically detected by the SIl system and of them 340 have been manually checked. Only one earthquake above M3 occurred on 8 July and it was M4.2. Most of the seismicity is still located about 10 km NE of Siglufjörður. Very few earthquakes occurred in the Öxarfjörður area. The earthquake swarm that started on the 19 June in the Tjörnes Fracture Zone is still on-going and around 13000 earthquakes have been automatically detected since its beginning. The swarm comprises three earthquakes with magnitude greater than 5 which occurred in the week 15-24 June. The seismic swarm has likely tectonic origin and there are still chances of large earthquakes occurring in the area."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Reykjanes peninsula: The automatic system detected more than 1200 events in the Reykjanes peninsula last week and about 330 were manually checked. The largest earthquake was a M3.3 on 7 July and it was located at about 1.5 km northeast of Grindavík town. The seismicity has been mainly confined in an area 2 km northeast of Grindavík. The latest interpretation of deformation data (based on both GPS and InSAR processing) suggest that the intrusion around Thorbjörn is slowly progressing and the inflation is still ongoing. Overall the seismic activity in the area is still elevated and characterized by sudden and frequent increase. There are currently no clear signs of a waning trend. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":324,"published_at":"2020-07-22T11:30:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Only three earthquakes were detected in Grímsvötn last week confirming a low level of seismicity which began in mid-June. A total of 2 meters has been gained by the water level height in the subglacial lake since the installation of GPS in Grímsvötn (occurred on 6 June). No unusual detection of gases in Grimsfjall so far. Many geophysical parameters suggest that Grímsvötn volcano is preparing for a new eruption, but the timeline is very hard to define. Over the summer time the scenario might escalate quickly. IMO keeps monitoring the area closely. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"About 50 earthquakes were located in Katla over the past week with one earthquake above M2 (M2.0) the 20th of July. The small geothermal water leakage from Katla is belived to be ongoing with increased conductivity measured in Múlakvísl river as well as increased gas in Láguhvolar. An overview of the seismic activity for Katla volcano is available here: http://hraun.vedur.is/ja/Katla/katla_qu_trends.html Additional information about Katla volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=KAT Tjörnes Fracture Zone: About 650 earthquakes have been automatically detected by the SIL system and of them around 200 have been manually checked this past week. Three earthquakes were above M3 (M3.1, M3.3. and M3.9) and one above M4 (M4.4) in the period of 16th to 19th of July. Most of the seismicity is still located about 10 km NE of Siglufjörður. The earthquake swarm that started on the 19 June in the Tjörnes Fracture Zone is still on-going and around 13700 earthquakes have been automatically detected since its beginning. The swarm comprises three earthquakes with magnitude greater than 5 which occurred in the week 15-24 June. The seismic swarm has likely tectonic origin and there are still chances of large earthquakes occurring in the area."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Note: Due to load on the system caused by the widespread seismic activity in the country, the accuracy in detecting earthquakes in specific areas might be compromised. Reykjanes peninsula: The automatic system detected more than 4700 events in the Reykjanes peninsula last week and about 500 were manually checked. The largest earthquakes were three events above M4 (M4.0, M4.6 and M4.9) and one above M5 (M5.1). All of them occurred between the 18 and the 20 of July and were concentrated in Fagradalsfjall, at less than 10 km NE of Grindavík town (https://en.vedur.is/about-imo/news/an-earthquake-swarm-in-fagradalsfjall). This seismic swarm occurred in a region which counts the presence of several N-S tectonic faults. In this sense it is interpreted that this are large tectonic earthquakes triggered by the stress induced by the magmatic unrest ongoing in the Reykjanes Peninsula, Overall, the recent activity is by far the most intense one detected in the Reykjanes peninsula since the beginning of the volcanic unrest in January this year (in terms of number and size of earthquakes). The latest interpretation of deformation data (based on both GPS) and seismic velocity variation analysis indicate that the intrusion around Thorbjörn is still progressing even though at lower rate. Overall the seismic activity in the area is still elevated and characterized by sudden and frequent increase. There are currently no clear signs of a waning trend. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":325,"published_at":"2020-07-29T11:30:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Three minor earthquakes were detected in Grímsvötn this week, same number as last week, confirming a continuation of low level of seismicity which began in mid-June. All of the earthquakes this week were below M1.0. The Grímsvötn subglacial lake has risen by a total of 2,5 meters since the installation of GPS on top of the Grímsvötn iceshelf (GPS installed on 6 June). No unusual detection of gases in Grímsfjall so far. Many geophysical parameters suggest that Grímsvötn volcano is preparing for a new eruption, but the timeline is very hard to define. Over the summer time the scenario might escalate quickly. IMO keeps monitoring the area closely. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Over 30 earthquakes were detected in Katla volcano this week, the week before they were around 50. Seven of the earthquakes were above M2.0 and there of two above M3.0, M3.3 (23 July) and M3.4 (27 July). An annual increase of seismicity is expected during the summer months (June to August) due to more access to meltwater and decrease of glacial load. A minor geothermal water leakage from Katla is belived to be still ongoing with increased conductivity measured in Múlakvísl river as well as increased gas concentration in Láguhvolar. This is also an annual phenomena. An overview of the seismic activity for Katla volcano is available here: http://hraun.vedur.is/ja/Katla/katla_qu_trends.html Additional information about Katla volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=KAT Tjörnes Fracture Zone (Just offshore N-Iceland): The seismic swarm at the Tjörnes Fracture Zone is slowly declining. About 540 earthquakes have been automatically detected by the SIL-system this week and 320 of them have been manually checked. No earthquake above M3.0 occurred this week, but 24 earthquakes above M2.0 were detected. Most of the seismicity is still located about 10 km NE of Siglufjörður. The earthquake swarm started on the 19 June in the Tjörnes Fracture Zone and almost 15000 earthquakes have been automatically detected since its beginning. The swarm comprises three earthquakes with magnitude greater than 5 which occurred on 20th and 21st of June. The seismic swarm has likely tectonic origin and there are still chances of large earthquakes occurring in the area."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Note: Due to load on the system caused by the widespread seismic activity in the country, the sensitivity in detecting small earthquakes (<M2) in specific areas might be compromised. Reykjanes peninsula: The automatic system detected 800 earthquakes on the Reykjanes peninsula last week and about 380 of them have been manually checked. This weeks activity is mostly a continuation of the seismic swarm that started there on 19th of July. The intensity of the swarm has though been decreasing during this week compared to the one before when the number of earthquakes was around 4700. The largest earthquake of this week in the area was M2.5 located 4km N of Grindavík. The latest interpretation of deformation data (based on both GPS) and seismic velocity variation analysis indicate that the magnatic intrusion west of Thorbjörn is still progressing even though at lower rate. Overall the seismic activity in the area is still elevated and characterized by sudden and frequent increase. There are currently no clear signs of an imminent hazard. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. News article published 23.7.2020: Update on the acitivity in the Reykjanes Peninsula An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":326,"published_at":"2020-08-05T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Ten minor earthquakes were detected in Grímsvötn this week, which is slightly more then the previous week. Ongoing continuation of low level seismicity wich began in mid-June. All of the earthquakes this week were below M1.3. The Grímsvötn subglacial lake has risen by a total of 3.0 meters since the installation of GPS on top of the Grímsvötn iceshelf (GPS installed on 6 June). No unusual detection of gases in Grímsfjall so far. Many geophysical parameters suggest that Grímsvötn volcano is preparing for a new eruption, but the timeline is very hard to define. Over the summer time the scenario might escalate quickly. IMO keeps monitoring the area closely. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Six earthquakes were detected in Katla volcano this week, which is considerably fewer than the week before, when there were around 50 earthquakes. All of the earthquakes this week were small, under M2,0. An annual increase of seismicity is expected during the summer months (June to August) due to more access to meltwater and decrease of glacial load. The geothermal water leakage from Katla into Múlakvísl river has decreased, with conductivity measurements getting lower. No unusual gas measurmest have been observed. The gothermal water leakage into Múlakvísl river is also an annual phenomena. An overview of the seismic activity for Katla volcano is available here: http://hraun.vedur.is/ja/Katla/katla_qu_trends.html Additional information about Katla volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=KAT Tjörnes Fracture Zone (Just offshore N-Iceland): The seismic swarm at the Tjörnes Fracture Zone is slowly declining. About 310 earthquakes have been automatically detected by the SIL-system this week and most of them have been manually checked. Three earthquakes around M3 have been detected in the past week. Most of the seismicity is still located about 10 km NE of Siglufjörður. The earthquake swarm started on the 19 June in the Tjörnes Fracture Zone and just over 15000 earthquakes have been automatically detected since its beginning. The swarm comprises three earthquakes with magnitude greater than 5 which occurred on 20th and 21st of June. The seismic swarm has likely tectonic origin and there are still chances of large earthquakes occurring in the area."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Note: Due to load on the system caused by the widespread seismic activity in the country, the sensitivity in detecting small earthquakes (<M2) in specific areas might be compromised. Reykjanes peninsula: The automatic system detected 680 earthquakes on the Reykjanes peninsula last week and most of them have been manually checked. This weeks activity is mostly a continuation of the seismic swarm that started there on 19th of July. The intensity of the swarm has decreased a little during this week compared to the one before when the number of earthquakes was around 800. The largest earthquakes of this week in the area were M3,4 at 03:50 on the 31st August and M3.0 on the same day. These earthquakes were about 12 km northeast of Grindavík. The latest interpretation of deformation data (based on both GPS) and seismic velocity variation analysis indicate that the magnatic intrusion west of Thorbjörn is still progressing even though at lower rate. Overall the seismic activity in the area is still elevated and characterized by sudden and frequent increase. There are currently no clear signs of an imminent hazard. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. News article published 23.7.2020: Update on the acitivity in the Reykjanes Peninsula An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":327,"published_at":"2020-08-12T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Only one minor earthquake was detected in Grímsvötn this week, which is significantly less than previous weeks. Ongoing continuation of low level seismicity wich began in mid-June. The Grímsvötn subglacial lake has risen by a total of 53 cm [last week’s report showed wrong values] since the installation of GPS on top of the Grímsvötn iceshelf (GPS installed on 6 June). No unusual detection of gases in Grímsfjall so far. Many geophysical parameters suggest that Grímsvötn volcano is preparing for a new eruption, but the timeline is very hard to define. Over the summer time the scenario might escalate quickly. IMO keeps monitoring the area closely. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"16 earthquakes were detected in Katla volcano this week. All of the earthquakes this week were small, under M2,0. An annual increase of seismicity is expected during the summer months (June to August) due to more access to meltwater and decrease of glacial load. The geothermal water leakage from Katla into Múlakvísl river has decreased, with conductivity measurements getting lower. No unusual gas measurmest have been observed. The gothermal water leakage into Múlakvísl river is also an annual phenomena. An overview of the seismic activity for Katla volcano is available here: http://hraun.vedur.is/ja/Katla/katla_qu_trends.html Additional information about Katla volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=KAT Tjörnes Fracture Zone (Just offshore N-Iceland): The seismic swarm at the Tjörnes Fracture Zone is slowly declining. About 1100 earthquakes have been automatically detected by the SIL-system this week and most of them have been manually checked. On August 8th, the activity increased significantly after an earthquake of magnitude M4.6 occurred at 03:46 11km NW of Gjögurtá, and an earthquake of M 3.7 occurred at 03:56 the same day. The earthquake swarm started on the 19 June in the Tjörnes Fracture Zone and just over 16000 earthquakes have been automatically detected since its beginning. The swarm comprises three earthquakes with magnitude greater than 5 which occurred on 20th and 21st of June. The seismic swarm has likely tectonic origin and there are still chances of large earthquakes occurring in the area."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Note: Due to load on the system caused by the widespread seismic activity in the country, the sensitivity in detecting small earthquakes (<M2) in specific areas might be compromised. Reykjanes peninsula: The automatic system detected 440 earthquakes on the Reykjanes peninsula last week and most of them have been manually checked. This weeks activity is mostly a continuation of the seismic swarm that started there on 19th of July. The activity increased on August 9-10, when around 250 earthquakes were detected, but has decreased since then. The intensity of the swarm has decreased a little during this week compared to the one before when the number of earthquakes was around 680. The largest earthquakes of this week in the area were M2.9 at 20:22 on August 9th and M2.8 on August 7th. These earthquakes were about 2 km southwest of lake Kleifarvatn. The latest interpretation of deformation data (based on both GPS) and seismic velocity variation analysis indicate that the magmatic intrusion west of Thorbjörn is still progressing even though at lower rate. Overall the seismic activity in the area is still elevated and characterized by sudden and frequent increase. There are currently no clear signs of an imminent hazard. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. News article published 23.7.2020: Update on the acitivity in the Reykjanes Peninsula An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":328,"published_at":"2020-08-19T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No earthquakes were detected in Grímsvötn this week and only one minor earthquake was detected in Grímsvötn last week, which is significantly less than previous weeks. Ongoing continuation of low level seismicity began in mid-June. Earlier this week (13. August) the GPS on top of Grímsvötn iceshelf (GPS installed on 6. June) showed a decline, but the reason was that the station itself tilted and showed wrong values. The station was fixed during the weekend but the values on the graph have not been fixed. The shelf is still rising. No unusual detection of gases in Grímsfjall so far. Many geophysical parameters suggest that Grímsvötn volcano is preparing for a new eruption, but the timeline is very hard to define. Over the summer time the scenario might escalate quickly. IMO keeps monitoring the area closely. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"four minor earthquakes were detected in Katla volcano this week, much fewer than last week when 16 earthquakes were deteced. All of the earthquakes this week were small, the largest M1,3. An annual increase of seismicity is expected during the summer months (June to August) due to more access to meltwater and decrease of glacial load. The geothermal water leakage from Katla into Múlakvísl river has decreased, with conductivity measurements getting lower. No unusual gas measurmest have been observed. The gothermal water leakage into Múlakvísl river is also an annual phenomena. An overview of the seismic activity for Katla volcano is available here: http://hraun.vedur.is/ja/Katla/katla_qu_trends.html Additional information about Katla volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=KAT Tjörnes Fracture Zone (Just offshore N-Iceland): The seismic swarm at the Tjörnes Fracture Zone is slowly declining. About 840 earthquakes have been automatically detected by the SIL-system this week and most of them have been manually checked. The largest earthquake there this week was M2.7 on 14. August. The earthquake swarm started on the 19 June in the Tjörnes Fracture Zone and over 17000 earthquakes have been automatically detected since its beginning. The swarm comprises three earthquakes with magnitude greater than 5 which occurred on 20th and 21st of June. The seismic swarm has likely tectonic origin and there are still chances of large earthquakes occurring in the area."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Note: Due to load on the system caused by the widespread seismic activity in the country, the sensitivity in detecting small earthquakes (<M2) in specific areas might be compromised. Reykjanes peninsula: The automatic system detected around 200 earthquakes on the Reykjanes peninsula last week and most of them have been manually checked. This weeks activity is mostly a continuation of the seismic swarm that started there on 19th of July. The intensity of the swarm has decreased a little during this week compared to the one before when the number of earthquakes was around 440. The largest earthquake of this week in the area was M2.2 at 01:16 on August 13th. Most of the earthquakes were around Fagradalsfjall. The latest interpretation of deformation data (based on both GPS) and seismic velocity variation analysis indicate that the magmatic intrusion west of Thorbjörn is still progressing even though at lower rate. Overall the seismic activity in the area is still elevated and characterized by sudden and frequent increase. There are currently no clear signs of an imminent hazard. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. News article published 23.7.2020: Update on the acitivity in the Reykjanes Peninsula An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"id":329,"published_at":"2020-08-26T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Nothing unusual to report."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Nothing unusual to report."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Elevated seismic activity is still ongoing in the peninsula. No major changes are detected since last week."}],"additional_notes":"Note: Between 23:30 UTC 21 of August until 13.30 UTC 22 August, there was a gap in the seismic data retrieval and the manual picking of the events was not possible. The automatic detection was, however, functioning and capable to detect any eventual changes in the seismic activity in the country. Tjörnes Fracture Zone (Just offshore N-Iceland): The seismic swarm at the Tjörnes Fracture Zone is still ongoing but slowly declining."},{"id":330,"published_at":"2020-09-02T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"On 1st of September, a Long-term monitoring meeting was held at the IMO. A general review of the monitoring geophysical data has been done for Bárðarbunga, Katla, Grímsvötn, Reykjanes and Öræfajökull. A general assessment of the volcano status is provided. Bárðarbunga (http://icelandicvolcanoes.is/?volcano=BAR) Seismic data and GPS data have been reviewed and discussed. The level of seismicity is generally low and well within the background established since the end of the eruption. A general inflation of the volcano edifice is still ongoing. No significant changes have been observed in the recent months. Grímsvötn (http://icelandicvolcanoes.is/?volcano=GRV) Seismic, geochemical and lake level data have been reviewed. The level of seismicity is significantly decreased over the last months with less than 10 earthquakes above M0.8 detected around the caldera in August (http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html). During the last survey performed at the volcano on the 16 of August, the GPS stations monitoring the water level in the subglacial lake of Grímsvötn has been fixed. Since then, the rate of water accumulation in the lake is constant and does not show significant deviations from the trend observed since its installation. The total raise of the lake level is now more than 5 meters. As long as the level of water keeps increasing, the likelihood for a flood is still high. However, we might expect the rate of water accumulation will decrease in the coming weeks in response to a slowering in the melting process due to lower ambient temperature. The CO2/H2 ratio has not been showing any changes over the last months, but the recent SO2 measurements show level below the detection limit. This might be explained as sulphur has been efficiently scrubbed from the high snow melting rate. The status of Grímsvötn is assessed to be unchanged since the beginning of the summer, with the potential for a flood triggering an eruption as a possible scenario. Katla (http://icelandicvolcanoes.is/?volcano=KAT) Seismic, hydrological and geochemical data have been reviewed. Katla showed the usual behaviour for the summer season with slightly heightend seismicity and occasional geothermal water leakages confirmed by both hydrological (increase in water level and conductivity) and geochemical monitoring data (increase level of CO2 and H2S). Nothing unusual detected at Katla. Reykjanes (http://icelandicvolcanoes.is/?volcano=REY) Seismic, deformation and geochemical data have been reviewed. Elevated seismicity is still ongoing in the peninsula. Last week, the activity has been characterized by a swarm that occurred on the 26th of August with an earthquake of M4.2 located few km East of Fagradalsfjall. The geodetic data (both GPS and InSAR) currently display no significant deformation in the vicinity of Thorbjörn or Fagradalsfjall (the most recent inflation episode near Thorbjorn has stopped). Geochemical data, routinely acquired in several locations along the peninsula, do not show significant changes in concentration and composition of gases. The level of unrest of the Reykjanes peninsula is unchanged and it might continue at similar rate for months. Öræfajökull (http://icelandicvolcanoes.is/?volcano=ORA) Seismic, hydrological and geochemical data have been reviewed. Nothing to report. The volcano does not show any indications of unusual activity."},{"id":331,"published_at":"2020-09-09T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Grímsvötn (http://icelandicvolcanoes.is/?volcano=GRV) The earthquake activity in Grímsvötn this week is slightly higher compared to the previous ones. Six earthquakes occured in Grímsvötn this past week, the largest event with M2.3 occurred this morning at 05:24. (http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html). The GPS station monitoring the water level in the subglacial lake of Grímsvötn shows the rate of water accumulation is constant and does not show significant deviations from the trend observed since its installation. The total raise of the lake level is now more than 6 meters. The status of Grímsvötn is assessed to be unchanged since the beginning of the summer, with the potential for a flood triggering an eruption as a possible scenario. Katla (http://icelandicvolcanoes.is/?volcano=KAT) On the 3rd of September, at 12:27, a M2.7 occurred in the Katla caldera. Few minutes later, an earthquake of magnitude 3.1 was measured in a similar location. This was the third earthquake above M3.0 detected this summer. Katla showes a usual behaviour for the summer season with slightly heightend seismicity and geothermal water leakages confirmed by hydrological data (increase in water level and conductivity in Múlakvísl river) (http://hraun.vedur.is/ja/Katla/temp_qu_katla.html). Reykjanes (http://icelandicvolcanoes.is/?volcano=REY) Earthquakes of magnitude 3.3 and 2.8 occurred at 06:21 and 06:20 the 7th of September 3.3 km NNW of Krýsuvík and were felt in the surrounding area. Considerably fewer earthquakes (350) occured on the Reykjanes peninsula this past week compared to the previous week (2100). The level of unrest of the Reykjanes peninsula is unchanged and it might continue at similar rate for months."},{"id":332,"published_at":"2020-09-16T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Bárðarbunga (http://icelandicvolcanoes.is/?volcano=BAR) M3.1 earthquake occurred near Hamarinn, a second central volcano of the Bárðarbunga volcanic system, on 15th of September. Total of 15 earthquakes were detected in that area this past week. Grímsvötn (http://icelandicvolcanoes.is/?volcano=GRV) The earthquake activity in Grímsvötn this week is similar to last week and remains slightly higher compared to the previous ones. Ten earthquakes occurred in Grímsvötn and the vicinity of the volcano this past week. The largest event was M1.7 on 11th of September. (http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html). The GPS station monitoring the water level in the subglacial lake of Grímsvötn shows the rate of water accumulation is constant and does not show significant deviations even though we might see the beginning of a slowering of the process due to the reduced melting rate in the autumn time. The total raise of the lake level is now close to 7 meters. The status of Grímsvötn is assessed to be unchanged since the beginning of the summer, with the potential for a flood triggering an eruption as a possible scenario. Reykjanes & Krýsuvík (http://icelandicvolcanoes.is/?volcano=REY & http://icelandicvolcanoes.is/?volcano=KRI) M3.0 earthquake occurred around 2km W of Kleifarvatn on 12th of September and was felt in the surrounding area. Earthquake activity on the Reykjanes peninsula was slightly lower this week (230) than the week before (350). Around 150 earthquakes of the 230 this week occurred in the area west of Kleifarvatn in the Krýsuvík Volcanic System. The level of unrest of the Reykjanes peninsula is unchanged and it might continue at similar rate for months."},{"id":333,"published_at":"2020-09-23T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Grímsvötn (http://icelandicvolcanoes.is/?volcano=GRV) The earthquake activity in Grímsvötn this week is similar to last week and remains higher compared to the previous weeks. Around 8 earthquakes occurred in Grímsvötn and the vicinity of the volcano this past week. The largest event was M1.7 on 16th of September. The attached graph shows clear signs that the monthly rate in September is above background levels. (http://hraun.vedur.is/ja/vatnajokulsvoktun/grimsvotn_qu_trends.html). The GPS station monitoring the water level in the subglacial lake of Grímsvötn shows the rate of water accumulation is constant and does not show significant deviations even though we might see the beginning of a slowering of the process due to the reduced melting rate in the autumn time. The total raise of the lake level is now just below 7.5 meters. Given the current status of Grímsvötn, a glacial flooding is assessed to be likely in the autumn. A flood might trigger a subsequent eruption in Grímsvötn. Reykjanes & Krýsuvík (http://icelandicvolcanoes.is/?volcano=REY & http://icelandicvolcanoes.is/?volcano=KRI) GPS data shows uplift in Krýsuvík that started in mid July. Yet we see no significant changes in geochemical composition of geothermal gases in the area. This is has been interperated as the results of the seismic activity that has been ongoing and evolving since early this year and has been migrating eastwards from mount Þorbjörn to Krýsuvík and Kleifarvatn last few months. The level of unrest of the Reykjanes peninsula is unchanged and it might continue at similar rate for months."},{"id":334,"published_at":"2020-09-30T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of M4.8 occurred on 27 September. Few more earthquakes followed the main shock."},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"The aviation color code has changed to yellow – see additional notes"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Grímsvötn (http://icelandicvolcanoes.is/?volcano=GRV) Volcanic activity at Grímsvötn has been gradually increasing over time as indicated by several regularly monitored geophysical and geochemical parameters that are now above the known background level; 1) the seismicity during the past month has been above average, 2) geothermal activity has increased over the past months with clear signs of deepening cauldrons in several places around the caldera, 3) the surface deformation has exceeded the level it was at prior to the 2011 eruption and 4) magmatic gases were measured in the geothermal emissions this summer. In addition, the water height in the subglacial lake is comparable to the level prior to the floods in 2004 and 2010, increasing the likelihood for a flood in the coming months. Multiple datasets now indicate that Grímsvötn volcano has reached a level of unrest, comparable to that observed prior to historic eruptions. For these reasons, the aviation color code has changed from green to yellow. This does not mean that an eruption is imminent, but an eruption could be triggered by depressurization if a subglacial lake inside the caldera will drain and cause a flood or occur regardless, possibly (like in 2011) with very weak precursory activity and short warning time. The conditions at the volcano may change at any given time and the volcano may return to normal background conditions without further escalation. Reykjanes & Krýsuvík (http://icelandicvolcanoes.is/?volcano=REY & http://icelandicvolcanoes.is/?volcano=KRI) About 150 earthquakes have been manually checked in the Reykjanes peninsula. The largest events occurred near Kleifarvatn (M2.2 on 26 and 29 September) and in the westermost part of the peninsula (M2.4 and M2.6 on 24 September). The level of unrest of the Reykjanes peninsula is unchanged and it might continue at similar rate for months."},{"id":335,"published_at":"2020-10-07T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Grímsvötn (http://icelandicvolcanoes.is/?volcano=GRV) The seismiciy in Grímsvötn last week comprises six small earthquakes. The rate of water accumulation in the subglacial lake got an acceleration in the last couple of days. This is possibly due to a second cauldron draining water into Grímsvötn lake and it might enhance the possibility for a flood. Since the beginning of the measurements in June, the water height has now reached 8.5 m. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. Reykjanes & Krýsuvík (http://icelandicvolcanoes.is/?volcano=REY & http://icelandicvolcanoes.is/?volcano=KRI) Less than 100 earthquakes have been manually checked in the Reykjanes peninsula. The largest event had a magnitude of M2 and occurred near Kleifarvatn on 4 October. The inflation in Krýsuvik is still ongoing at similar rate as confirmed by both GPS data and seismic velocity change analysis. The level of unrest of the Reykjanes peninsula is unchanged and it might continue at similar rate for months."},{"id":336,"published_at":"2020-10-14T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"The aviation color code is still yellow – see additional notes"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Grímsvötn (http://icelandicvolcanoes.is/?volcano=GRV) The seismiciy in Grímsvötn last week comprises of six minor earthquakes. The rate of water accumulation in the subglacial lake continues to increase. Since the beginning of the measurements in June, the water height has now reached 9 m. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. The primary power supply stopped yesterday, but the secondary unit continued working. A new primary powers supply was installed last night with everything running smoothly. Reykjanes & Krýsuvík (http://icelandicvolcanoes.is/?volcano=REY & http://icelandicvolcanoes.is/?volcano=KRI) Around 200 earthquakes have been manually checked on the Reykjanes peninsula. The largest event had a magnitude of M2.0 and occurred near Reykjanes on October 12th. The inflation in Krýsuvik is still ongoing at similar rate as confirmed by both GPS data and seismic velocity change analysis. The level of unrest of the Reykjanes peninsula is unchanged and it might continue at similar rate for months."},{"id":337,"published_at":"2020-10-21T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"The aviation color code is still yellow – see additional notes"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Grímsvötn (http://icelandicvolcanoes.is/?volcano=GRV) Very low seismicity has been recorded at Grímsvötn last week with only four earthquakes located around the caldera. The largest earthquake had a magnitude of M1.7 and occurred on 19 October. The rate of water accumulation in the subglacial lake continues to increase and the water height level, since the GPS installation, is now approaching 10 m. A monitoring flight survey has been conducted last week to check for ice surface changes. However, the measurements did not show clear unusual signs of activity. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial eruption can be expected in the near future and this could be followed by an eruption. Reykjanes & Krýsuvík (http://icelandicvolcanoes.is/?volcano=REY & http://icelandicvolcanoes.is/?volcano=KRI) On 20th of October, an earthquake of M5.6 occurred at about 5 km West of the geothermal area in Seltún on the Reykjanes peninsula (Krýsuvík volcanic system). The earthquake was felt widely around the country, especially the southern part of the Reykjanes peninsula and in the capital area, which is at about 25 km from the epicenter. Til now, more than 2000 earthquakes have been automatically detected in the area in the aftermath of the main shock. More than 30 earthquakes had a magnitude above M3. Few hours after the large event, two earthquakes of M4 occurred in Fagradalsfjall area (hit by a M5 on the 19th of July this year). The seismic swarm is still ongoing. There are no signs of volcanic tremor. Earthquake history of the Reykjanes Peninsula shows that large earthquakes have occurred in the past in connection with large earthquake swarms. Therefore, there is the possibility of large aftershocks occurring in this swarm. Largest earthquakes in the area can possibly reach M5.5-6. Those types of earthquakes can cause damages within the capital area."},{"id":338,"published_at":"2020-10-28T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"The aviation color code is still yellow – see additional notes"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Grímsvötn (http://icelandicvolcanoes.is/?volcano=GRV) Very low seismicity has been recorded at Grímsvötn last week with only two earthquakes located around the caldera. The largest earthquake had a magnitude of M1.7 and occurred on 25th of October. The rate of water accumulation in the subglacial lake continues to increase and the water height level, since the GPS installation, is now approaching 10 m. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial eruption can be expected in the near future and this could be followed by an eruption. Reykjanes & Krýsuvík (http://icelandicvolcanoes.is/?volcano=REY & http://icelandicvolcanoes.is/?volcano=KRI) Over 2000 earthquakes have occured on the Reykanes peninsula following a M5.6 earthquake on 20th of October just West of the geothermal area in Seltún. More than 30 earthquakes had a magnitude above M3. The seismic swarm has drastically decreased since October 26th."},{"id":339,"published_at":"2020-11-04T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Low seismicity by Grímsvötn this week, where 6 earthquakes were detected around the caldera, the largest earthquake mesured M1.4 and occurred on October 29th. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial eruption can be expected in the near future and this could be followed by an eruption. Because of a failure of a electric generator in Grímsfjall (top of Grímsvötn), the radiolink is broken and no monitoring data are currently received at IMO from several stations on the glacier. IMO is currently missing data from tiltmeter, GPS stations (for lake level monitoring and deformation), gas monitoring stations, and those webcams installed on the glacier. The monitoring capability for Grímsvötn is therefore reduced. However, 11 seismic stations within 50 km from the center of the volcano are currently streaming data to IMO in real time. The monitoring of Grímsvötn volcano then relies on the seismic data only to detect any increase or occurrence of tremor in connection to the onset of a flood. The infrasound, webcam and radar network around Vatnajökull glacier are up and running. Attempts will be made to fix the data transmission this week, as soon as the weather will allow. Please note that in either in the case of a volcanic eruption or in the case of a glacial outburst flood the seismic stations installed on the glacier are expected to detect a tremor signal allowing for leeway warning time. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes peninsula: Some aftershocks have been detected this week, since the M5.6 earthquake on the October 20th but the overall level of seismicity has decresed significantly and is approaching background activity. The Earthquakes are related to the volcano-tectonic reactivation of the Reykjanes Peninsula which commenced in December 2019. The unrest is ongoing and the occurrence of additional large earthquakes is considered likely. There are currently no clear signs of an imminent hazards. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Five minor earthquakes were detected near and in Hekla this week, the largest measured M1.2 the other between M0.2 and M0.6. Neither gas or strain measurements by the volcano show any notable changes this previous week. Additional information about Hekla volcano can be found here: http://icelandicvolcanoes.is/?volcano=HEK"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":340,"published_at":"2020-11-11T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Four earthquakes were detected around Grímsvötn last week, the largest earthquake measured M1.9 and occurred on November 10th in the NE part of the caldera. Gas measurements have been recently repeated in the SW part of the caldera with a Multigas instrument and the results show that the amount of magmatic gases is well comparable to what was measured in June (when for the first time SO2 was detected). No significant changes in gas composition are observed since June. The generator and the radionlink on the glacier have been fixed over the weekend and the data started to stream again to IMO. Unfortunately, the connection has been slighlty unstable since and IMO experienced periodic gap in the monitoring data. However, from the GPS data collected so far, it seems that no major changes have occurred in the subglacial lake and the water keeps accumulating at similar rate as before. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial eruption can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes peninsula: The seismic activity in the Reykjanes peninsula has significantly reduced in the last week. The two largest earthquakes had a magnitude of 2.6 and both occurred West of Kleifarvatn (Krýsuvík). The inflation in Krýsuvík is still ongoing as confirmed by the real time GPS measurements. There are currently no clear signs of imminent hazards. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=REY"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Note: Due to load on the system caused by the widespread seismic activity in the country, the sensitivity in detecting small earthquakes (<M2) in specific areas might be compromised."},{"id":341,"published_at":"2020-11-18T12:10:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"No earthquakes were detected around Grímsvötn last week. Possibly the detection of small earthquakes have been affected by the temporarily reduced monitoring capability. The streaming of data from the stations installed on the glacier is now stable and data are coming in regularly. The water level in the lake keeps raising at similar rate as before with no significant changes. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial eruption can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: About 270 earthquakes occurred in the Reykjanes peninsula last week slightly more than the previous one. The largest earthquake had a magnitude 2.7 and occurred at about 1 km NW of the town of Gríndavík. A seismic swarm, which comprised about 70 earthquakes, occurred on the 11th November at 3 km West of Fagradalsfjall. MultiGAS and Radon measurements have been performed in both Reykjanes-Svartsengi and Krýsuvík volcanic systems last week, and no significant changes in the geochemical composition are observed. Following the M5.6 earthquake, occurred on the 20th October, the deformation in Krýsuvík volcanic systems appears to have ceased. There are currently no clear signs of imminent hazards. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":342,"published_at":"2020-11-25T11:00:00Z","entries":[{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"NB: Since last week, the streaming of data from the stations installed on the glacier is stable and monitoring data are coming in regularly. Only four earthquakes were detected around Grímsvötn last week, all of them below M1.5. The water level in the lake keeps raising and it has now exceeded 10 meters since the beginning of the measurements in June 2020. However, over the last few weeks, the rate has been gradually decreasing. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial eruption can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi, Krýsuvík and Brennisteinsfjöll: About 280 earthquakes occurred in the Reykjanes peninsula last week, very similar to the previous one. The largest earthquake had a magnitude 2.2 and occurred in the Brennisteinsfjöll volcanic system on 20th November. A series of small earthquakes, all below M1.5, affected the Reykjanes-Svartsengi system. This seismicity mainly occurred in two areas: west of Þorbjörn and south of Fagradalsfjall. Following the M5.6 earthquake, occurred on the 20th October, the deformation in Krýsuvík volcanic systems appears to have ceased. There are currently no clear signs of imminent hazards. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi, Krýsuvík and Brennisteinsfjöll volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY, http://icelandicvolcanoes.is/?volcano=KRI and http://icelandicvolcanoes.is/?volcano=BRE"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of magnitude 3.1 occurred on the 22 November"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":343,"published_at":"2020-12-02T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"NB: Since last week, the streaming of data from the stations installed around Grímsfjall/Grímsvatn has been unstable. A trip to the site is necessary as soon as there is an opening in the weather. There has not been any detections No earthquakes has been were detected around Grímsvötn last week. The water level in the lake keeps raising and it‘s now around 11 meters higher than in the beginning of the measurements in June 2020. However, over the last few weeks, the rate has been gradually decreasing. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial eruption can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: About 120 earthquakes occurred on the Reykjanes peninsula last week, around half compared to the previous week. The largest earthquake was a magnitude 3.6 and occurred just North of the town, Grindavík on December 1st. A series of earthquakes, all below M2.6 affected the Reykjanes-Svartsengi system. The seismicity mainly occurred East of Þorbjörn and between Fagradalsfjall and Kleifarvatn. Following the M5.6 earthquake, occurred on the 20th October, the deformation in Krýsuvík volcanic systems appears to have ceased. There are currently no clear signs of imminent hazards. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":344,"published_at":"2020-12-09T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"NB: Since last week, the streaming of data from the stations installed around Grímsfjall/Grímsvatn has been unstable. IMO staff went on a trip to Grímsfjall but unfortunately it seems as if the gps installed in the lake is broken and therefore another trip to the site is necessary as soon as there is an opening in the weather. Two earthquakes were detected near Grímsfjall/Grímsvötn last week of M1.1 and M1.5 respectively. The water level in the lake keeps raising and it is now around 11 meters higher than in the beginning of the measurements in June 2020. However, over the last few weeks, the rate has been gradually decreasing. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial eruption can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: About 180 earthquakes occurred on the Reykjanes peninsula last week, a bit more compared to the previous week when 120 earthquakes were detected. A series of earthquakes, all below M2.6 affected the Reykjanes-Svartsengi system. The seismicity mainly occurred East of Þorbjörn and between Fagradalsfjall and Kleifarvatn. The inflation around Krýsuvík is currently ongoing. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":345,"published_at":"2020-12-16T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"NB: Since the 4th of December, the streaming of data from the stations installed around Grímsfjall/Grímsvatn has been unstable. IMO staff went on a trip to Grímsfjall but unfortunately it seems as if the gps installed in the lake is broken and therefore another trip to the site is necessary as soon as there is an opening in the weather. No earthquakes were detected near Grímsfjall/Grímsvötn last week. The water level in the lake keeps raising and it is now around 11 meters higher than in the beginning of the measurements in June 2020. However, over the last few weeks, the rate has been gradually decreasing. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial eruption can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: Around 320 earthquakes occurred on the Reykjanes peninsula last week, more compared to the previous week when 180 earthquakes were detected. The largest earthquakes were M4.1 this morning (16th of December) around 7 km NE of Reykjanestá and M3.5 the 10th of December 3 km NE of Reykjanestá and they were both felt in the Reykjanes peninsula as well as the capital area. The seismicity mainly occurred in three clusters, two just NE of Reykjanestá and one SW of Fagradalsfjall while other earthquakes were widely distrubuted around the peninsula. There are currently no significant changes deteced on the GPS, however small movements appear to be continuing at Krýsuvík. More data in the coming days or weeks will help in interperating the ongoing processes. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":346,"published_at":"2020-12-23T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.9 earthquake occurred in the Bárðarbunga caldera on 21. December. Total of eleven earthquakes occurred there this week. Earthquakes of this magnitude occur regularly in Bárðarbunga and this is the eleventh earthquake above M3.0 this year. Last time an earthquake of this magnitude was located there was in September when M4.8 earthquake was detected."},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since 9. December no data has been received from the gps instrument located on the ice shelf in Grímsvötn caldera. IMO staff went to Grímsfjall and attempted to repair the instrument but that did not work out and it needs to be replaced. Seismic station, webcam and gas measurements on Grímsfjall are streaming data normally. Five minor earthquakes, all below M1.0, were detected near Grímsfjall/Grímsvötn last week. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: Around 280 earthquakes occurred on the Reykjanes peninsula last week, little bit less than last week 320 earthquakes were detected. The largest earthquake was M2.1 close to Reykjanes and occurred on 19. December. The activity this week was scattered over the area from Reykjanes to Kleifarvatn. There are currently no significant changes deteced on the GPS, however small movements appear to be continuing at Krýsuvík. More data in the coming days or weeks will help in interperating the ongoing processes. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":347,"published_at":"2020-12-30T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Only 4 earthquakes occurred in the Bárðarbunga Caldera last week. The largest one was M2,6."},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since 9. December no data has been received from the gps instrument located on the ice shelf in Grímsvötn caldera. IMO staff went to Grímsfjall and attempted to repair the instrument but that did not work out and it needs to be replaced. Seismic station, webcam and gas measurements on Grímsfjall are streaming data normally. Two earthquakes, all below M2.0, were detected near Grímsfjall/Grímsvötn last week. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: Around 240 earthquakes occurred on the Reykjanes peninsula last week, little bit less than last week when 280 earthquakes were detected. The largest earthquake was M2.3 close to Grindavík and occurred on 27. December. The activity this week was scattered over the area from Grindavík to Kleifarvatn. There are currently no significant changes deteced on the GPS, however small movements appear to be continuing at Krýsuvík. More data in the coming days or weeks will help in interperating the ongoing processes. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":348,"published_at":"2021-01-06T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Six earthquakes were detected around Grímsvötn last week. The majority of them had minor intensity but one was of M1.4 and occurred on the 30th of December in the NE part of the caldera. No other significant changes can be reported for Grímsvötn volcano. The Aviation Color Code for Grímsvötn volcano is currently yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: Around 270 earthquakes occurred in the Reykjanes peninsula last week, slightly more than the previous one. All of them were below M2 and the largest ones were about M1.9. The activity continues to be scattered along the entire peninsula, from Reykjanesstá to Kleifarvatn lake. The InSAR processing did not detect any recent line-of-sight (LOS) ground deformation anywhere on the peninsula, however small movements might still be continuing at Krýsuvík. Recent gas measurements, performed around Þorbjörn, show no changes in the surface emissions. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"NB: On Tuesday the 12th of January IMO will have the monthly long-term monitoring meeting. The main conclusion and results will be commented in the next VWR."},{"id":349,"published_at":"2021-01-13T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismic activity around and within the caldera continues at similar rate as previous months/years since the end of the eruption (February 2015) and it is characterized by occasional large earthquakes with magnitude between M4 and M5. The deep seismicity cluster, located at about 8 km SE the caldera rim, is often active and possibly it is slightly increased since April 2020. The deformation data confirms the volcano is recharging and the current estimates of recharged volume (assuming constant inflow) since the end of the Holuhraun eruption 1 March 2015 is now assessed to be 0.19-0.25 km3. Overall, the activity at Bárðarbunga is considered normal for a volcano in a recharging state. Bárðarbunga is known for long periods (decades) of recharging without unrest. Additional information about the Bárðarbunga volcano can be found here http://icelandicvolcanoes.is/?volcano=BAR"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Six small earthquakes were detected around Grímsvötn last week, within and around the caldera. The subglacial lake keeps rising slowly at a similar rate as the previous weeks. The MultiGAS located in Saltarinn (SE caldera rim) is up and running and occasionally detects peaks in CO2. Such detections occurred already in the past and are not considered alarming. The monitoring of the glacial river Gígjukvísl works properly, with good and frequent data acquisition. In the coming weeks three gas sensors will be installed in the southern part of the Skeiðarárjökull glacier edge to increase the capability of jökulhlaup detection (originating from Grímsvötn). Regular COSMO Sky-Med images acquisitions are taken for an area covering Grímsvötn. The data are acquired at high frequency to possibly catch the co-eruptive phase. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: Around 570 earthquakes occurred in the Reykjanes peninsula last week, significantly more than the previous one. The seismic activity clustered around four main areas on the peninsula from Þorbjörn til Kleifarvatn lake. Two main seismic swarms occurred: one was located two km north of Þorbjörn on the 10th of January with the largest earthquake M4.0; the second swarm was located west of Krýsuvík and occurred on the 7th of January with the largest earthquake M3.2. Overall, the level of seismicity is still elevated with the occasional occurrence of large earthquakes. The InSAR processing did not detect any recent line-of-sight (LOS) ground deformation anywhere on the peninsula, however small movements might still be continuing at Krýsuvík. Unfortunately, IMO is experiencing some delay in the GPS data processing, making an interpretation of the deformation pattern not possible at this time. Specialists are currently working to fix the problem with the data processing. The radon concentration time series reveal a higher peak in correspondence to the second intrusion period (April 2020). However, more analysis is needed to identify a correlation between geochemical variability and other geophysical parameters. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"The level of seismicity is very low. Occasional earthquakes with magnitude above M1 occur on the main edifice at shallow depth. The geochemical monitoring on top of Hekla is up and running and it shows occasional increase of CO2 (this is considered normal behaviour for this volcano). No significant changes in the deformation are reported. Overall, the activity at Hekla is considered well within the known background condition. Additional information about the Hekla volcano can be found here: http://icelandicvolcanoes.is/?volcano=HEK"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"The level of seismicity is considered low. Most of the detected seismicity occurs within the caldera and it is related to the geothermal activity beneath the ice. The hydrological parameters from the glacial rivers around Katla are well within the values expected for this period of the year. Overall, the activity at Katla is considered well within the known background condition. Additional information about the Katla volcano can be found here: http://icelandicvolcanoes.is/?volcano=KAT"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismic activity is very low, with no swarms occurring and few occasional events. No recent updates from the deformation are available. The hydrological monitoring around the volcano is recently disrupted by weather-related issues and sometimes IMO experience temporarily communication interruptions. Overall, the activity at Öræfajökull is considered well within the known background conditions. Additional information about the Öræfajökull volcano can be found here http://icelandicvolcanoes.is/?volcano=ORA"}],"additional_notes":"NB: Yesterday (12.01.2021) the IMO specialists had the monthly long-term monitoring meeting. This report includes the main outcomes from the meeting."},{"id":350,"published_at":"2021-01-20T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Four small earthquakes were detected around Grímsvötn last week, within and around the caldera. The subglacial lake keeps rising slowly at a similar rate as the previous weeks. The MultiGAS located in Saltarinn (SE caldera rim) is up and running and occasionally detects peaks in CO2. Such detections occurred already in the past and are not considered alarming. The monitoring of the glacial river Gígjukvísl works properly, with good and frequent data acquisition. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: Around 240 earthquakes occurred in the Reykjanes peninsula last week, significantly less than the previous week. All earthquakes were below M2.5 in the previous week. Overall, the level of seismicity is still elevated with the occasional occurrence of large earthquakes. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 on the 16th of january."}],"additional_notes":""},{"id":351,"published_at":"2021-01-27T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Only two small earthquakes were detected around Grímsvötn last week, within and around the caldera. The subglacial lake keeps rising slowly without showing any significant changes over the past weeks. Since yesterday the hydrological station monitoring the glacial river Gígjukvísl shows an increase in the water amount as well as an increase in the electrical conductivity. The webcam images confirm an increased amount of water in the river. This trend is quite unusual for this period of the year and it might indicate the beginning of a slow leak from Grímsvötn. IMO follows very carefully the changes in the river and any significant changes will be communicated through the standard channels. No other unusual changes in geophysical parameters are detected around Grímsvötn volcano. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: Around 470 earthquakes occurred in the Reykjanes peninsula last week, significantly more than the previous week. The seismicity clustered around two main areas south and west of Fagradalsfjall. The activity was mainly characterized by earthquakes with magnitudes below M1.5. The largest event occurred on 23th of January and it had a magnitude of 1.7 at about 2 km west of Fagradalsfjall. Overall, the level of seismicity is still elevated with the occasional occurrence of large earthquakes. Slow deformation is still ongoing in Krýsuvík. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":352,"published_at":"2021-02-03T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Five earthquakes were detected around Grímsvötn last week, the largest a M2.4 the 29th of January. The subglacial lake keeps rising slowly without showing any significant changes over the past weeks. The unusual conditions in Gigjukvísl glacier river, reported last week, were due to an ice blockage upstream the river. The apparent increase in the electrical conductivity was therefore not due to geothermal leakage originating from Grímsvötn. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: Around 650 earthquakes occurred in the Reykjanes peninsula last week, more than the previous week. The seismicity clustered around two main areas south and west of Fagradalsfjall. The activity was mainly characterized by earthquakes with magnitudes below M2.0. The largest event occurred on 1st. of February and it had a magnitude of 2.6 at about 1.5 km west of Fagradalsfjall and was felt in the area. Overall, the level of seismicity is still elevated with the occasional occurrence of large earthquakes. Slow deformation is still ongoing in Krýsuvík. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI Langjökull -Þórisjökull: An earthquake swarm occurred in Þórisjökull glacier just SW of Langjökull the morning of 27th of January and lasted until midnight that same day. 40 earthquakes were located, the largest was M2.9. Swarms have previously occurred in the area and around 1100 earthquakes have been located since 1991."},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":353,"published_at":"2021-02-10T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Two earthquakes were detected around Grímsvötn last week, the largest measured M1.4 on the February 5th. The subglacial lake keeps rising slowly without showing any significant changes over the past weeks. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: More than 900 earthquakes were detected on the Reykjanes peninsula last week, more than the previous week. The seismicity clustered around two main areas south and west of Fagradalsfjall. The largest earthquake of the week occurred on February 9th and measured M2.9, it was further to the east in relation to the two aforementioned areas, or just south of lake Kleifarvatn. The activity was mainly characterized by earthquakes with magnitudes below M2.0. The largest event occurred on 1st. of February and it had a magnitude of 2.6 at about 1.5 km west of Fagradalsfjall and was felt in the area. Overall, the level of seismicity is still elevated with the occasional occurrence of large earthquakes. Slow deformation is still ongoing in Krýsuvík. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI Grímsey NE of Iceland: A earthquake swarm started on February 4th about 12km NNE of the island of Grímsey and was ongoing in the reporting week. More than 340 earthquakes were detected, the largest quake measured 3.0 on February 9th."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake M2.9 on February 5th."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":354,"published_at":"2021-02-17T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Earthquake M4.0 on 13th of February"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Four earthquakes were detected around Grímsvötn last week, the largest measured M1.7 on the February 16th. The subglacial lake keeps rising slowly without showing any significant changes over the past weeks. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: More than 300 earthquakes were detected on the Reykjanes peninsula last week, considerably fewer than the previous week. The seismicity was mainly in the area between Fagradalsfjall and Grindavík. The largest earthquake M3.0 occurred February 11th near Fagradalsfjall, all the others were around or below M2.0. A minor earthquake swarm was just west of Kleifarvatn lake. The largest earthquakes were M2.1. Overall, the level of seismicity is still elevated with the occasional occurrence of large earthquakes. The deformation nearby Krýsuvík appears to have temporarly stopped. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":355,"published_at":"2021-02-24T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seven earthquakes were detected around Grímsvötn last week, the largest measured M1.7 on the February 23rd. The subglacial lake keeps rising slowly without showing any significant changes over the past weeks. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Reykjanes-Svartsengi and Krýsuvík: Activity at Reykjanes has been increasing for the past two days. In the previous week more than 500 earhtquakes have been detected on Reykjanes peninsula, considerably more than the previous week. The seismicity is mainly focused by Fagradalsfjall. The largest earthquake in the previous week was of M2.8 on February 18th near Fagradalsfjall. Overall, the level of seismicity is still elevated with the occasional occurrence of large earthquakes. The deformation nearby Krýsuvík appears to have temporarly stopped. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Reykjanes-Svartsengi and Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=REY and http://icelandicvolcanoes.is/?volcano=KRI"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":356,"published_at":"2021-03-03T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Three small earthquakes were detected around Grímsvötn last week, the largest measured M0.8 on the February 28th. Overall, the seismic activity in February has been slightly higher than the one in January, but still within the known background level. The measurements of the subglacial lake level do not show significant changes over the past weeks, with the water level raising at a slow rate. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"An intense earthquake swarm started on the Reykjanes Peninsula on February 24th with an earthquake M5.7 followed by an M5.0. Since then, quite a few earthquakes over M4.0 have been detected and two earthquakes over M5.0. They occurred on February 27th and March 1st, respectively. The seismic activity has been concentrated around the area NE Fagradalsfjall (at about 9 km West of the Krýsuvík volcanic system). The latest InSAR and GPS data show a deformation pattern in the area where the elevated seismicity is currently located. The most likely explanation for this signal is an inflow of magma at depth. In light of the ongoing activity five scenarios are identified: The seismic activity will die out in the next days/weeks The seismicity will escalate further with an earthquake up to M6 nearby Fagradalsfjall The seismicity will escalate further with an earthquake up to M6.5 nearby Brennisteinsfjöll The magmatic intrusion in Fagradalsfjall will: Eventually stop and the magma solidify Eventually lead to an effusive eruption The swarm is still ongoing and the SIL system has detected around 15 000 earthquakes in the area. Overall, the level of seismicity is still elevated with the occasional occurrence of large earthquakes. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=KRI"}],"additional_notes":""},{"id":357,"published_at":"2021-03-17T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"No earthquakes have been detected around Grímsvötn last week. The communication to some stations installed on the glacier has been unstable for few days due to icing and cold weather. However, the last data from the GPS station in the lake did not show any significant variations over the past few weeks. The gas sensors along Gigjúkvísl river (fed by the glacier edge south of Skeiðarárjökull) are all up and running and will help to detect timely the onset of a possible flood. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Over the past week more than 1200 earthquakes have been manually located around the Fagradalsfjall area. A total of 16500 earthquakes have been automatically detected by the seismic network. Around 160 events had magnitude above M3, of these eleven were above M4 and one above M5. The largest event occurred on the 14th of March and was located at about 2 km SW of Fagradalsfjall. Along with the elevated seismicity, an important deformation has been mapped via GPS data and interferograms images and revealed a magmatic dike intruding between Fagradalsfjall and Keilir mountains. The dike kept progressing toward the SW of Fagradalsfjall for the last couple of weeks. Its depth is assessed to be around 1 km below the surface and it is assessed to be 3 to 5 km long. Over the last couple of days, the seismicity has been migrating to the NE of the dike path, suggesting an hault in a further migration towards the SW of Fagradalsfjall. Presence of surficial fracturing in the area suggest the tension in the crust keeps increasing. The last interpretation of the deformation data indicates that the magmatic intrusion is still receiving new magma from depth. At the same time the seismicity is showing a temporarily and apparent reduction in frequency and magnitude. This might indicate the beginning of a new phase in the current volcanic unrest in Krýsuvík/Fagradalsfjall volcanic system. The likelihood of an eruption is still considered elevated and the most likely location is, for the time being, assessed to be NE of Fagradalsfjall. The current volcanic unrest in the Reykjanes peninsula keeps changing with time and it is difficult to anticipate its evolution in the future. IMO keeps monitoring the area closely. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Additional information about the Krýsuvík volcanic systems can be found here: http://icelandicvolcanoes.is/?volcano=KRI Update on the ongoing activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula"}],"additional_notes":"NOTE: please be aware that due to the intense seismic activity on going in the Reykjanes peninsula the capability of the system to locate and detect small-sized earthquakes in other parts of the country might be reduced. However, we expect to detect seismic activity above M2 throughout the whole country."},{"id":358,"published_at":"2021-03-24T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Five earthquakes have been detected around Grímsvötn last week, the largest a M2.0 last night. The communication to some stations installed on the glacier has been unstable for days due to icing and cold weather. However, the last data from the GPS station in the lake did not show any significant variations over the past few weeks. The gas sensors along Gigjúkvísl river (fed by the glacier edge south of Skeiðarárjökull) are all up and running and will help to detect timely the onset of a possible flood. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"At 20:45 the of 19th of March a volcanic eruption started in Geldingadalir in the Reykjanes peninsula. During the evening of the 19th the aviation color code for Fagradalsfjall-Krýsuvík was set to red, “Eruption is underway with significant emission of ash into the atmosphere.” The fissure was 180 m long located at 63.8883, -22.26667. The 20th of March the aviation color code was changed to ORANGE because of the lack of ash and tephra emission in the atmosphere and due to no imminent hazard for the aviation. The eruption is ongoing and is featuring a lava field which keeps growing at the base of few active vents. Total volume of lava was estimated at 1,8 mill m3 yesterday. The estimated extrusion rate is assessed, as for yesterday, to be about 5,7 m3/sec. DOAS traverses have been performed the past days and the assessment gives a flux of SO2 between 13 and 50 kg/s. The seismic activity is minor and spread around the Fagradalsfjall area. The condition at the eruption site has not been changing significantly over the last couple of days. Because of the lack of ash and tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation. Over the past week more than 1400 earthquakes have been manually located around the Fagradalsfjall area. A total of 4,000 earthquakes have been automatically detected by the seismic network. Three earthquakes had magnitude above M3, the largest event occurred on the 18th of March and was located at about 1 km SW of Fagradalsfjall. The seismicity has drastically reduced since the eruption started. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast is accessible here: https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20eruption An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"}],"additional_notes":""},{"id":359,"published_at":"2021-03-31T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Six earthquakes have been detected around Grímsvötn last week, the largest a M2.1 on the 24th of March. The communication to some stations installed on the glacier has been unstable for days due to icing and transmitter problems. However, the last data from the GPS station in the lake did not show any significant variations over the past few weeks. The gas sensors along Gigjúkvísl river (fed by the glacier edge south of Skeiðarárjökull) are all up and running and will help to detect timely the onset of a possible flood. The Aviation Color Code for Grímsvötn volcano is maintained yellow. The conditions at the volcano may change at any given time and IMO monitors it closely. A glacial flood can be expected in the near future and this could be followed by an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"At 20:45 the of 19th of March a volcanic eruption started in Geldingadalir in the Reykjanes peninsula. The eruption in Fagradalsfjall continues at similar rate as before. From the latest Pléiades image acquisition (LMI) the extrusion rate has been assessed to be about 5.3 m3/sec. The last DOAS traverse, performed on the 28.03, gave an SO2 flux estimate up to 19 kg/s. The gas plume height as assessed from calibrated images this morning gave a plume up to 1.0 km asl. There is no production of ash and tephra. Because of the lack of ash and tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation. Over the past week around 800 earthquakes have been manually located around the Fagradalsfjall area. A total of 1,400 earthquakes have been automatically detected by the seismic network, all below magnitude M3,0. The seismicity has drastically reduced since the eruption started, with only a few hundred earthquakes each day. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast is accessible here: https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"}],"additional_notes":""},{"id":360,"published_at":"2021-04-07T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Three minor earthquakes have been detected around Grímsvötn last week, the largest was a M0.9. The communication to some stations installed on the glacier has been unstable for days due to icing and cold weather. No GPS data have been available for the last few weeks. The gas sensors along Gigjúkvísl river (fed by the glacier edge south of Skeiðarárjökull) are all up and running and will help to detect timely the onset of a possible flood. The Aviation Color Code for Grímsvötn volcano is maintained yellow, but a Longterm monitoring meeting is scheduled for the end of the month and the status of Grímsvötn volcano will be reassessed then. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Since its beginning on the 19th of March, the eruption which started in Geldingadalir in the Reykjanes peninsula, progressed and evolved with time. On the 5th of April a new fracture opened at roughly 500 m from the active main vents. The new fissure was 200 m long and its location was eventually identified to be 63.8946, -22.2628. The two eruptions kept running at the same time producing two different lava fields propagating in Geldingadalur and Meradalir valleys, respectively. The two lava fields are evolving in valleys quite far from inhabited regions. Often the two volcanic plumes were well distinguishable from the webcams and their height have been often assessed to be up to 1.4 km asl. Yesterday night (6th of April) an additional fissure opened in an area between the two pre-existing fissures (preliminary coordinate is 63.89133, -22.266750). The lava from this last fissure (currently become a single vent) is draining also into Geldingadalur. The eruption is currently ongoing and three main sources are active at the same time. The intensity at the main initial vent diminished in the last days when the additional fissures started to erupt. There are no updated values on the last extrusion which started this night, but as of yesterday the total rate was assessed to be about 5-6 m3/s (data from University of Iceland). The last DOAS traverse performed yesterday gave an SO2 flux of 33 kg/s. All the activity is taking place in the area where, prior to the eruption, the magmatic intrusion was detected and mapped. In light of the recent developments, it cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation. Over the past week more than 320 earthquakes have been manually located around the Fagradalsfjall area. A total of 730 earthquakes have been automatically detected by the seismic network. The largest earthquake had a magnitude M3, and it occurred on the 4th of April and was located at about 6 km NE of the eruption site. The seismicity has drastically reduced since the eruption started. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":361,"published_at":"2021-04-14T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Only four earthquakes have been detected around Grímsvötn last week, all of them below M1. The connection to the GPS installed in the lake has been restored and data are now coming in regularly. No significant changes are observed, but the rate of water accumulation is lowering down. The gas sensors along Gigjúkvísl river (fed by the glacier edge south of Skeiðarárjökull) are all up and running and will help to detect timely the onset of a possible flood. The Aviation Color Code for Grímsvötn volcano is maintained yellow, but a Longterm monitoring meeting is scheduled for the end of the month and the status of Grímsvötn volcano will be reassessed then. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Since its beginning it progressed and evolved with time. Currently more than eight independent vents are active at the same time and all emit lava and inject gas in the atmosphere. The last opening occurred this morning at about 11.30 UTC and it is located between the already active area. The vents lie along a 700 m long alignment. The current eruption is producing two different lava fields propagating in Geldingadalur and Meradalur valleys. The lava field extends in valleys quite far from inhabited regions. The volcanic plume is often well observable from the web cameras and it is assessed to have a centerline oscillating between 500 and 1500 m asl. The last estimate on effusion rate has been provided on the 12.04 and it indicated a cumulative extrusion rate of 4.7 m3/s (data from University of Iceland). The last DOAS traverse performed yesterday gave an SO2 flux of 29 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. In light of the recent developments, it cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation. Over the past week more than 300 earthquakes have been manually located around the Fagradalsfjall area and a total of 450 earthquakes have been automatically detected by the seismic network. The current seismicity is mainly located at 4-6 km NE of the ongoing eruption. The seismicity has drastically reduced since the eruption started. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":362,"published_at":"2021-04-21T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Only four earthquakes have been detected around Grímsvötn last week, largest M1,2 other less than M1. The connection to the GPS installed in the lake has been restored and data are now coming in regularly. No significant changes are observed, but the rate of water accumulation is lowering down. The gas sensors along Gigjúkvísl river (fed by the glacier edge south of Skeiðarárjökull) are all up and running and will help to detect timely the onset of a possible flood. The Aviation Color Code for Grímsvötn volcano is maintained yellow, but a Longterm monitoring meeting is scheduled for the end of the month and the status of Grímsvötn volcano will be reassessed then. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Since its beginning it progressed and evolved with time. Currently more than eight independent vents are active at the same time and all emit lava and inject gas in the atmosphere. The last opening occurred this morning at about 11.30 UTC and it is located between the already active area. The vents lie along a 700 m long alignment. The current eruption is producing two different lava fields propagating in Geldingadalur and Meradalur valleys. The lava field extends in valleys quite far from inhabited regions. The volcanic plume is often well observable from the web cameras and it is assessed to have a centerline oscillating between 500 and 1500 m asl. The last estimate on effusion rate has been provided on the 12.04 and it indicated a cumulative extrusion rate of 4.7 m3/s (data from University of Iceland). The last DOAS traverse performed yesterday gave an SO2 flux of 29 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. In light of the recent developments, it cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation. Over the past week more than 470 earthquakes have been manually located around the Fagradalsfjall area and about 820 earthquakes have been automatically detected by the seismic network. Largest measured yesterday April 20th at 23:05 just NE of Mt. Thorbjörn, M4.1 The current seismicity is mainly located at 4-6 km NE of the ongoing eruption. The seismicity has drastically reduced since the eruption started. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":363,"published_at":"2021-04-28T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"16 earthquakes have been detected around Grímsvötn last week, the largest one M2.4. The connection to the GPS installed has been out for the last 24 hours, but it should be up and running shortly. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood will be higher in the coming weeks/months. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Since its beginning it progressed and evolved with time. During the last week three vents either stopped emitting lava or dramatically reduced their strength. Currently about four independent vents are active at the same time and all emit lava and inject gas in the atmosphere. The lava flows keep propagating in Geldingadalur and Meradalur valleys. The lava field extends in valleys quite far from inhabited regions. The last estimate on effusion rate has been provided on the 26.04 and it indicated a cumulative extrusion rate of 6 m3/s (data from University of Iceland). The last DOAS traverse performed yesterday gave an SO2 flux between of 50 and 70 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. In light of the recent developments, it cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation. Over the past week more than 200 earthquakes have been manually located around the Fagradalsfjall area and a total of 300 earthquakes have been automatically detected by the seismic network. The current seismicity is mainly located at 4-6 km NE of the ongoing eruption. The seismicity has drastically reduced since the eruption started. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":364,"published_at":"2021-05-05T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"9 earthquakes have been detected around Grímsvötn last week, the largest one M1.5. The connection to the GPS installed is now up and running. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood will be higher in the coming weeks/months. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Since its beginning it progressed and evolved with time. During the last week all vents stopped emitting lava except for vent nr. 5. Therefore currently one vent is active at and emits lava and injects gas into the atmosphere. The lava flows keep propagating in Geldingadalur and Meradalur valleys. The lava field extends in valleys quite far from inhabited regions. The last estimate on effusion rate has been provided on the 03.05 and it indicated a cumulative extrusion rate of 7,5 m3/s (data from University of Iceland). The last DOAS traverse performed on Monday May 3rd gave an SO2 flux between of 27 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. In light of the recent developments, it cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation. Over the past week more than 70 earthquakes have been manually located around the Fagradalsfjall area and a total of 130 earthquakes have been automatically detected by the seismic network. Four earthquakes of M2.0 or more were detected in Borgarfjall, approx. 1 km south of the eruption site. The current seismicity is mainly located at 4-6 km NE of the ongoing eruption. The seismicity has drastically reduced since the eruption started. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":365,"published_at":"2021-05-12T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"9 earthquakes have been detected around Grímsvötn last week, the largest one M1.5. The connection to the GPS installed in the lake is now up and running in a stable manner. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood will be higher in the coming weeks/months. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Since its beginning it progressed and evolved with time. As of now only vent nr. 5 is active and is erupting in a pulsating manner alternating between active lava fountaining reaching 500m a.s.l and no activity. The lava flows keep propagating in Geldingadalur and Meradalur valleys. The lava field extends in valleys quite far from inhabited regions. The last estimate on effusion rate has been provided on the 11.05 and it indicated a cumulative extrusion rate of 12,9 m3/s (data from University of Iceland). Previous discharge numbers gave an average of 8 m3/s and so the most recent measurements indicate a significant increase in the lava discharge. Regardless, the increase in discharge rate the latest measurement of SO2 flux still shows values comparable to those observed previously, and the observation yesterday gave a flux of about 50 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. In light of the recent developments, it cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent. The seismic activity is slowly decreasing, over the past week roughly 300 earthquakes have been detected on the Reykjanes peninsula, compared to around 500 the previous weeks. All the earthquakes this past week were below M3.0 and most of them were located in the northern most of end of the dike beneath Fagradalsfjall. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":366,"published_at":"2021-05-19T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 earthquake occurred on 12th of May in the Bárðarbunga caldera. In total 25 earthquakes were detected in the caldera last wee. Additional information about Bárðarbunga volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=BAR#"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 earthquake occurred SW of Eldey on Reykjanes ridge on 14th of May. In total 13 earthquakes between M1.5 and M3.2 were detected 20-30 km SW of Eldey last week. Additional information about Eldey volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=ELD#"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Four minor earthquakes were detected around Grímsvötn last week, all below M1.0. The connection to the GPS installed on the ice covered lake has been unstable for the last weeks and is currently offline. A field trip to Grímsvötn is scheduled in the coming weeks. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood will be higher in the coming weeks/months. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Since its beginning it progressed and evolved with time. As of now only vent nr. 5 is still active and is erupting in a pulsating manner alternating between active lava fountaining reaching 500m a.s.l and no activity. The lava flows keep propagating in Geldingadalur and Meradalur valleys. The lava field extends in valleys quite far from inhabited regions. The Department of Civil Protection and Emergency management requested that a barrier would be constructed to try to prevent the lava flow from entering Nátthagi Valley south of the eruption site where there are important communication infrastructure. The barriers are now under construction. The last estimate on effusion rate was provided today, 19th of May, and it indicated an average extrusion rate of 10.8 m3/s during the time period between 11th and 18th of May(data from University of Iceland and Icelandic Institute of Natural History). That is slightly lower extrusion rate compared the week before when it was estimated 12.9 m3/s. Due to uncertainty in measurements this difference is not considered significant. Total volume of the lava flow is now 38 million m3 and covers an area of 2.06 km2. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. In light of the recent developments, it cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent. The seismic activity is further decreasing, over the past week nearly 200 earthquakes have been detected on the Reykjanes peninsula, compared to roughly 300 the previous week. All the earthquakes this past week were below M3.0 and they were spread of the area from the SW-ern tip of the Reykjanes peninsula and Lake Kleifarvatn. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":367,"published_at":"2021-05-26T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Six earthquakes were detected around Grímsvötn last week, the largest one M1.8. The connection to the GPS installed on the ice covered lake is still unstable but a field trip to Grímsvötn is scheduled in the coming weeks and will try to solve the communication issues. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood will be higher in the coming weeks/months. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Since its beginning it progressed and evolved with time. As of now only vent nr. 5 is still active and is erupting in a pulsating manner alternating between active lava fountaining reaching 500m a.s.l and no activity. The lava flows keep propagating in Geldingadalur and Meradalur valleys. Saturday evening it overflew the barriers (constructed last week) and is now flowing into Nátthagi valley and is slowly getting closer to important communication infrastructure. Due to bad weather conditions at the eruption site no new measurements have been provided this week, so no new effusion rate estimates are available. A DOAS traverse was performed yesterday and gave a flux of SO2 between 48 and 58 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. In light of the recent developments, it cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity is further decreasing, over the past week nearly 90 earthquakes have been detected on the Reykjanes peninsula, compared to roughly 200 the previous week. One earthquke M3,4 was detected in the Brennisteinsfjöll area (at about 20 km East of the eruption site), others below M3,0. The activity spread over an area between the SW-ern tip of the Reykjanes peninsula to Brennisteinsfjöll. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":368,"published_at":"2021-06-02T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Six small earthquakes were detected around Grímsvötn last week. A field trip to Grímsvötn is ongoing and broken instruments are being fixed or replaced. The GPS station is online again and it is now sending data. New data acquisition and measurements will be taken in Grímsvötn (and Bárðarbunga) and the results will made available through the VWR as soon as they will be ready. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood will be higher in the coming weeks/months. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and is still erupting in a pulsating manner. The lava flows keep propagating in Geldingadalir and Meradalir valleys as well as Nátthagi. Due to bad weather conditions at the eruption site no new measurements have been provided this week, so no new effusion rate estimates are available, neither new SO2 fluxes are available. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity is still quite low, over the past week around 80 earthquakes have been detected on the Reykjanes peninsula, all below magnitude M3,0. The activity spread over an area between the SW-ern tip of the Reykjanes peninsula to Brennisteinsfjöll. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":369,"published_at":"2021-06-09T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Eight small earthquakes were detected around Grímsvötn last week, largest M1,3. The GPS station is online and it is now sending data, showing normal trend in uplift of the ice sheet. A field trip took place last week and a team of scientists visited Vatnajökull. Gas measurements were done in the SW part of the Grímsvötn caldera revealing lower values of SO2 than the two previous years (with an increase in H2/SO2 ratio).There are also evidences of a decrease in geothermal activity in the Eastern part of the caldera. These observations might suggest the volcano is cooling down. However, the latest estimate of water volume accumulated in the lake is of 0.7 km3 (the largest since the flood occurred in 1996) and it is assessed that not more than 1 km3 can be collected. The possibility of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood will be higher in the coming weeks/months. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and is still erupting in a pulsating manner. The lava flows keep propagating in Geldingadalir and Meradalir valleys as well as Nátthagi. Latest lava discharge measurements since June 2nd (15 day mean discharge) show discharge at 12.4 m3/s. The lava area at 2,67 km2 and the cubic volume of 54,3 million m3. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity is still quite low, over the past week little more than 100 earthquakes have been detected on the Reykjanes peninsula, largest of M2,5. The activity was mostly over the intrusion just NE-of the volcano and at the SW end of Reykjanes Peninsula, Reykjanesta. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":370,"published_at":"2021-06-16T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seven small earthquakes were detected around Grímsvötn last week, largest M1,7. The connection to the GPS station is unstable and is not sending constant data. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and releases lava in Geldingadalir and Meradalir valleys as well as Nátthagi. The release is less pulsating than before with a quite steady overflow from the large crater that has formed (large roughly 100 m). Latest lava discharge measurements since June 11th show discharge at 11.9 m3/s. The lava area at 3.23 km2 and the cubic volume of 62.9 million m3. The last SO2 flux assessed with DOAS traverse indicates values between 45 and 85 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity is still quite low, over the past week little less than 100 earthquakes have been detected on the Reykjanes peninsula, largest of M2,4. The activity was mostly over the intrusion just NE-of the volcano and at the SW end of Reykjanes Peninsula, Reykjanesta. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":371,"published_at":"2021-06-23T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Five small earthquakes were detected around Grímsvötn last week, largest M1,8. The connection to the GPS station is unstable and is not sending constant data. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Bárðarbunga: About 18 earthquakes were detected in SE of Bárðarbunga, largest M1,6. Little more than 30 earthquakes were in or close to the crater of Bárðarbunga, largest M1,6."},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and releases lava in Geldingadalir and Meradalir valleys as well as Nátthagi. The release is less pulsating than before with a quite steady overflow from the large crater that has formed (large roughly 100 m). Latest lava discharge measurements since June 11th show discharge at 11.9 m3/s. The lava area at 3.23 km2 and the cubic volume of 62.9 million m3. The last SO2 flux assessed with DOAS traverse indicates values between 45 and 85 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity is still quite low, over the past week about 80 earthquakes have been detected on the Reykjanes peninsula, largest of M1,8. The activity was mostly over the intrusion just NE-of the volcano and at the SW end of Reykjanes Peninsula, Reykjanesta. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":372,"published_at":"2021-06-30T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Four small earthquakes were detected around Grímsvötn last week, largest M0.8. GPS operated by the University of Iceland show a constant trend in water accumulation in the lake over the past weeks. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Bárðarbunga: About 30 earthquakes were detected in SE of Bárðarbunga, largest M1,6. Little more than 30 earthquakes were in or close to the crater of Bárðarbunga, largest M2,6."},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and releases lava in Geldingadalir and Meradalir valleys as well as Nátthagi. The volcanic tremor changed over the past few days since 28th of June where it dropped down and was quite low until it picked up again around evening on the 29th of June. Visibility has been quite low so it is hard to see what it is happening at the vent, however an air pilot confirmed that he saw the crater barriers collapse and clog up the channel. Possibly the channel has now cleared again as the tremors are increasing again. Recent camera images showed lava flowing again from the main vent. Latest lava discharge measurements since June 26th show value of 13.0 m3/s. The lava area is now at 3.82 km2 and the emitted volume is 79.8 million m3. The last SO2 flux assessed with DOAS traverse indicates values between 50 and 85 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity is higher than last week with about 180 earthquakes on the Reykjanes peninsula, largest of M2,7. The activity was mostly over the intrusion just NE-of the volcano, SW end of Reykjanes Peninsula, Reykjanestá and east of Bláfjöll in Syðri-Eldborg. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":373,"published_at":"2021-07-07T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Three small earthquakes were detected around Grímsvötn last week, largest M1,4. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past 10 days. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Bárðarbunga: About 30 earthquakes were detected in SE of Bárðarbunga, largest M 3,2 in northern part of the caldera."},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and releases lava in Geldingadalir and Meradalir valleys as well as Nátthagi. The volcanic tremor changed since 28th of June where it has been going down for a while and then rising up hours later. While the tremor goes down the activity in the crater goes down and as it rises the activity resumes in the crater. However even though there is little or none activity while the tremor drops down, lava seems to keep flowing underneath the old lava and lifting it up. Since 5th of July the tremor has been down for 34 hours, which is the longest pause since the beginning of the eruption. Even though the tremor is down some amber has been seen in the crater as of yesterday. Latest lava discharge measurements since June 26th show value of 13.0 m3/s. The lava area was estimated to be 3.82 km2 and the emitted volume 79.8 million m3. The last SO2 flux assessed with DOAS traverse indicates values between 26 and 65 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity is less than last week with about 70 earthquakes on the Reykjanes peninsula, largest of M1,8. The activity was mostly over the intrusion just NE-of the volcano, SW end of Reykjanes Peninsula, Reykjanestá and north of Grindavík. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":374,"published_at":"2021-07-14T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Three small earthquakes were detected around Grímsvötn last week, largest M1,2. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past three weeks. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and recently most of the lava is released towards Meradalir valley, NE of the eruption site. Since the 10th of July the volcanic tremor started to show regular pulsating activity in connection with intensifying activity within the crater. About three-four pulses per hour are detected. Due to bad weather condition it has been not possible to fly over the eruption site so no new measurements of flow rate and lava extensions are available. The last SO2 flux assessed with DOAS traverse indicates values between 60 and 80 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity around the eruption site has been characterized by about 30 earthquakes. The largest event had magnitude of M1,6 and it was about 2km SW of Kleifarvatn lake. On the 11th of July a swarm of 35 earthquakes occurred nearby Þorbjörn area. In the past months the activity in Þorbjörn has not been very elevated and this recent swarm is slightly unusual. Since then no more earthquakes have been detected in the area. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":375,"published_at":"2021-07-21T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Two small earthquakes were detected around Grímsvötn last week, largest M1,2. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past three weeks. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and recently most of the lava is released towards Meradalir valley, NE of the eruption site. The tremor has been fluxing between days where it goes completely down for few hours and then goes back up. The activity in the crater follows nicely with the tremor plots showing activity when the tremor is high and no activity when it is low. Even though there is no activity in the crater when the tremor goes down, lava is still flowing from underneath the vent. Due to bad weather condition it has been not possible to fly over the eruption site so no new measurements of flow rate and lava extensions are available. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 60 earthquakes spreading evenly over peninsula. The largest event was of M1,3 and was located about 3 km SE of Kleifarvatn lake. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":376,"published_at":"2021-07-28T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes larger than M3 occurred on the southern rim of the Bárðarbunga caldera in the evening of 27th July. The first one was M3.9 at 19:02 and the second one was M4.6 at 22:12. This later earthquake is the largest earthquake in Bárðarbunga since late September 2020. These events are interpreted as the continuation of rebound earthquakes in the caldera since the eruption in Holuhraun in 2015."},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Four small earthquakes were detected around Grímsvötn last week, largest two were M1,7. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past three weeks. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and recently most of the lava is released towards Meradalir valley, NE of the eruption site. The tremor has been fluxing between days where it is absent for several hours and then slowly rises up again with duration of active tremor period lasting several hours. The activity in the crater follows nicely with the tremor plots showing activity when the tremor is high and no activity when it is low. Even though there is no activity in the crater when the tremor goes down, lava is still flowing from underneath the vent. Latest lava discharge measurements since June 19th show average lava discharge has decreased from the previous measurement and is now 7.5 m³/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 60 earthquakes spreading evenly over peninsula. The largest event was of M1,3 and was located about 3 km SE of Kleifarvatn lake. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":377,"published_at":"2021-08-04T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes:"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Five small earthquakes were detected around Grímsvötn last week, largest one was M1.1. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past four weeks. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Mýrdalsjökull: About 80 earthquakes were detected in Mýrdalsjökull where the largest earthquake was M3.3. Two other earthquakes were measured over M3 and several after aftershocks followed. Slightly increased seismicity like this is normal during the summertime. Reykjanes ridge: About 40 earthquakes were detected on Reykjanes ridge where the largest earthquake was M4. About 10 earthquakes were measured over M3. Earthquake swarms like this are normal on Reykjanes ridge."},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and recently most of the lava is released towards Meradalir valley, NE of the eruption site. The tremor has been fluxing between days where it is absent for several hours and then slowly rises up again with duration of active tremor period lasting several hours. The activity in the crater follows nicely with the tremor plots showing activity when the tremor is high and no activity when it is low. Even though there is no activity in the crater when the tremor goes down, lava is still flowing from underneath the vent. Latest lava discharge measurements since 27th of July show average lava discharge is now 11.3 m³/s. Last measurement on the 19th of July showed average lava discharge at 7.5 m³/s which is likely to have been underestimated because other measurements were used that include more uncertainty. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 165 earthquakes spreading evenly over peninsula. The largest event was of M2.4 and was located on Langahrygg close to the eruption site. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":378,"published_at":"2021-08-11T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes:"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seven small earthquakes were detected around Grímsvötn last week, largest one was M2.2. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past four weeks. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Mýrdalsjökull: About 15 earthquakes were detected in Mýrdalsjökull where the largest earthquake was M2.1. Electrical conductivity increased in Múlakvísl river east of Mýrdalsjökull during the past week. And the most likely explanation is leakage from sub glacial cauldrons, this activity is seen every year during the high melt season. A leakage of this type is preferred as it decreases the likelihood of a large jökulhlaup (glacier outburst flood)."},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and recently most of the lava is released towards Meradalir valley, NE of the eruption site. The tremor has been fluxing between days where it is absent for several hours and then slowly rises up again with duration of active tremor period lasting several hours. The activity in the crater follows nicely with the tremor plots showing activity when the tremor is high and no activity when it is low. Even though there is no activity in the crater when the tremor goes down, lava is still flowing from underneath the vent. Latest lava discharge measurements since 8th of August show average lava discharge is now 9.3 m³/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 105 earthquakes spreading evenly over peninsula. The largest event was of M3 and was located on the edge of Reykjanes peninsula. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":379,"published_at":"2021-08-18T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes:"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Nine small earthquakes were detected around Grímsvötn last week, largest one was M1.5. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past four weeks. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV Mýrdalsjökull: About 55 earthquakes were detected in Mýrdalsjökull where the largest earthquake was M3.1. Electrical conductivity in Múlakvísl has gone down and the water level as well."},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and recently most of the lava is released towards Meradalir valley, NE of the eruption site. The tremor has been fluxing between days where it is absent for several hours and then slowly rises up again with duration of active tremor period lasting several hours. The activity in the crater follows nicely with the tremor plots showing activity when the tremor is high and no activity when it is low. Even though there is no activity in the crater when the tremor goes down, lava is still flowing from underneath the vent. Latest lava discharge measurements since 8th of August show average lava discharge is now 9.3 m³/s no new data has been measured since. Small crevasses were sighted on the hill which now is isolated by lava. GPS and heat thermometer have been placed on the hill to measure weather magma is intruding or if it is simply due to compression of the lava. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 110 earthquakes spreading evenly over peninsula. The largest event was of M2.8 and was located roughly 3 km northwest of Grindavík. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":380,"published_at":"2021-08-25T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"About 10 small earthquakes were detected around Grímsvötn last week, largest one was M2.5 located on Grímsfjall. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past four weeks. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and recently most of the lava is released towards Meradalir valley, NE of the eruption site. The tremor has been fluxing between days where it is absent for several hours and then slowly rises up again with duration of active tremor period lasting several hours. The activity in the crater follows nicely with the tremor plots showing activity when the tremor is high and no activity when it is low. Even though there is no activity in the crater when the tremor goes down, lava is still flowing from underneath the vent. Latest lava discharge measurements since 8th of August show average lava discharge is now 9.3 m³/s no new data has been measured since. The last SO2 flux assessed with DOAS traverse on the 21st of August indicates values between 40 and 188 kg/s. However, on the 20th of August the values were between 2 and 8 kg/s. The large variation from day to day is associated with the variability in the eruption intensity. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 80 earthquakes spreading evenly over the peninsula. The largest event was of M1.6 northeast of Litli Hrútur. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":381,"published_at":"2021-09-01T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"About six small earthquakes were detected around Grímsvötn last week, largest one was M1.4 located on Grímsfjall. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past four weeks. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier. The probability of a flood in the summer-time is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still ongoing. Vent nr. 5 is still the only one active and recently most of the lava is released towards Meradalir valley, NE of the eruption site. The tremor has been fluxing between days where it is absent for several hours and then slowly rises up again with duration of active tremor period lasting several hours. The activity in the crater follows nicely with the tremor plots showing activity when the tremor is high and no activity when it is low. Even though there is no activity in the crater when the tremor goes down, lava is still flowing from underneath the vent. Latest lava discharge measurements since 8th of August show average lava discharge is now 9.3 m³/s no new data has been measured since. The last SO2 flux assessed with DOAS traverse on the 26th of August indicates values between 120-222 kg/s. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 50 earthquakes spreading evenly over the peninsula. The largest event was of M1.2 northeast of Keilir. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":382,"published_at":"2021-09-08T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"GPS observations and ground deformation maps derived from Sentinel-1 satellite data reveal that Askja volcano began inflating at the beginning of August 2021. This represents a change in the ground deformation history in Askja, as it has been subsiding since about 1985. The ongoing uplift is centered on the western edge of Öskjuvatn (the lake in the caldera) and corresponds now to a total change of ~6 cm. Geodetic modeling (performed using both GPS and satellite data) indicates that the source of this inflation is located at a depth of approximately 3 km. New data will be available this evening (08.09) and a new model inversion will be run to evaluate the total volume change. The cause of such inflation is uncertain, but most likely it is due to the inflow of new magma in the volcanic system. Askja volcano is seismically active and earthquakes are regularly measured in the area. Last week about 70 earthquakes have been detected in the eastern part of Askja, with earthquake activity still ongoing. The largest earthquake in the previous week was of M1.9. IMO monitors closely the events. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Two small earthquakes were detected around Grímsvötn last week, larger one was M1.5 located on Grímsfjall. The two GPS operated by the University of Iceland and the IMO consistently show increasing trend in water accumulation in the lake over the past four weeks. This increase is due to the higher melting rate that as expected began with the summer-time at the glacier and is still ongoing. The probability of a flood from Grímsvötn in the near future is considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the summer time increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still active. However, since last Thursday (the 2nd of September) the tremor dropped and has been low since with minor activity. Thermal anomaly within and around the crater is occasionally detected by cameras and satellite. Sustained degassing is also still ongoing at the vent. No new measurements of discharge rate are available as the bad weather did not allow new flights since 8th of August. No new SO2 flux estimates have been done since 26th August. All the activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 50 earthquakes spreading evenly over the peninsula. The largest event was of M1.2 northeast of Keilir. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":383,"published_at":"2021-09-15T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Eight earthquakes were detected around Grímsvötn last week, largest one was M1.3. The water level in the lake keeps raising at quite constant rate. The probability of a flood from Grímsvötn in the near future is still considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"GPS observations and ground deformation maps derived from Sentinel-1 satellite data reveal that Askja volcano is still inflating, since the beginning of August 2021. This represents a change in the ground deformation history in Askja, as it has been subsiding since about 1985. The ongoing uplift is centered on the western edge of Öskjuvatn (the lake in the caldera) and corresponds now to a total change of ~9 cm. Geodetic modeling (performed using both GPS and satellite data) indicates that the source of this inflation is located at a depth of approximately 2-3 km. Evaluation from new data suggest that the inflation volume is around 2.6 million m3. Most likely it is due to the inflow of new magma in the volcanic system. If an eruption occurs, chances of an explosive eruption are pretty high. Due to this, the aviation color code has been updated to yellow, and the Department of Civil Protection and Emergency Management has moved to “uncertainty phase”, meaning increased monitoring and communication. Askja volcano is seismically active and earthquakes are regularly measured in the area. Last week about 60 earthquakes have been detected in Askja, most of them in the eastern part, with earthquake activity still ongoing. The largest earthquake in the previous week was of M1.6. IMO monitors closely the events and has already plan the implementation of more monitoring instruments in the area to allow a better coverage and detection of changes in the volcano activity Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still active. The activity increased last week and on Monday (13.09), the pulsating activity started again and is currently ongoing. Sustained degassing is also still ongoing at the vent. New measurements of discharge were made on September 9th and show a discharge of 8.5 m3/s. No new SO2 flux estimates have been done since 26th August when the gas concentration was below the detection limit. New measurements will be done today, September 15th. Around 35 earthquakes were detected in the area in the recent week. The volcanic activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 175 earthquakes, most of them formed a swarm of just northeast of Reykjanestá. The largest event was of M2.5 southwest of lake Kleifarvatn. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":384,"published_at":"2021-09-22T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The inflation in Askja volcano continues at similar rate. The ongoing uplift is centered on the western edge of Öskjuvatn (the lake in the caldera) and corresponds now to a total change of ~ 10 cm. The latest geodetic modeling (performed using both GPS and satellite data) indicated that the source of this inflation is located at a depth of approximately 2-3 km. Most likely it is due to the inflow of new magma in the volcanic system. If an eruption occurs, chances of an explosive eruption are pretty high. Due to this, the aviation color code has been updated to yellow, and the Department of Civil Protection and Emergency Management has moved to “uncertainty phase”, meaning increased monitoring and communication. Askja volcano is seismically active and earthquakes are regularly measured in the area. Last week about 40 earthquakes have been detected in Askja, fewer than the previous week when they were around 65. Most of the weathquakes were located in the eastern part of the caldera, with earthquake activity still ongoing. The largest earthquake in the previous week was of M2.1 the 18th of September. IMO monitors closely the events and has already plan the implementation of more monitoring instruments in the area to allow a better coverage and detection of changes in the volcano activity Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seven earthquakes were detected around Grímsvötn last week, largest one was M2.1. The water level in the lake keeps raising at quite constant rate. The probability of a flood from Grímsvötn in the near future is still considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still active. The activity has decreased since the 18th of September but sustained degassing is still ongoing at the crater. New measurements of discharge were made on September 17th and show a discharge of 11,8 m3/s (data from University of Iceland and Icelandic Institute of Natural History). SO2 flux assessed on the 15th of September showed values between 80-100 kg/s. Around 15 earthquakes were detected in the area in the recent week. The volcanic activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 70 earthquakes, most of them formed a swarm of just northeast of Reykjanestá. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":385,"published_at":"2021-09-29T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"GPS observations and ground deformation maps derived from Sentinel-1 satellite data reveal that Askja volcano is still inflating, since the beginning of August 2021. This represents a change in the ground deformation history in Askja, as it has been subsiding since about 1985. The ongoing uplift is centered on the western edge of Öskjuvatn (the lake in the caldera) and corresponds now to a total change of 10-12cm. Geodetic modeling (performed using both GPS and satellite data) indicates that the source of this inflation is located at a depth of approximately 2-3 km. Evaluation from new data suggest that the inflation volume is around 2.6 million m3. Most likely it is due to the inflow of new magma in the volcanic system. If an eruption occurs, chances of an explosive eruption are pretty high. Due to this, the aviation color code has been updated to yellow, and the Department of Civil Protection and Emergency Management has moved to “uncertainty phase”, meaning increased monitoring and communication. Askja volcano is seismically active and earthquakes are regularly measured in the area. Last week about 40 earthquakes have been detected in Askja, most of them in the eastern part, with earthquake activity still ongoing. The largest earthquake in the previous week was of M1.7 the 22nd of September. IMO monitors closely the events and has already plan the implementation of more monitoring instruments in the area to allow a better coverage and detection of changes in the volcano activity Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Five earthquakes were detected around Grímsvötn last week, largest one was M1.9. The water level in the lake keeps raising at quite constant rate. The probability of a flood from Grímsvötn in the near future is still considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on the 19th of March in Geldingadalur is still active. The activity has decreased since the 18th of September but sustained degassing is still ongoing at the vent. New measurements of discharge were made on September 17th and show a discharge of 11,8 m3/s (data from University of Iceland and Icelandic Institute of Natural History). SO2 flux assessed on the 15th of September showed values between 80-100 kg/s. Around 150 earthquakes were detected in the area in the recent week. A new seismic swarm started on the 17th of September between Keilir and Litla-Hrút, largest was M3 on 29th of September. The volcanic activity is taking place in the area where, prior to the eruption, a magmatic intrusion was detected and mapped. It cannot be excluded that more fractures will open along the same alignment. Because of the lack of ash and the minor tephra emission in the atmosphere, the aviation color code for Fagradalsfjall-Krýsuvík is maintained ORANGE as there are no imminent hazard for the aviation, expect for an area with a radius of 650 m around the active vent due to potential lapilli and scoria fallout. The seismic activity on Reykjanesskagi consisted of about 190 earthquakes, most of them due to swarm between Keilir and Litli-Hrútur. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":386,"published_at":"2021-10-06T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"GPS observations and ground deformation maps derived from Sentinel-1 satellite data reveal that Askja volcano is still inflating, since the beginning of August 2021. This represents a change in the ground deformation history in Askja, as it has been subsiding since about 1985. The ongoing uplift is centered on the western edge of Öskjuvatn (the lake in the caldera) and corresponds now to a total change of 10-12cm. Geodetic modeling (performed using both GPS and satellite data) indicates that the source of this inflation is located at a depth of approximately 2-3 km. Evaluation from new data suggest that the inflation volume is around 2.6 million m3. Most likely it is due to the inflow of new magma in the volcanic system. If an eruption occurs, chances of an explosive eruption are pretty high. Due to this, the aviation color code has been updated to yellow, and the Department of Civil Protection and Emergency Management has moved to “uncertainty phase”, meaning increased monitoring and communication. Since the 20th of September we have not received any GPS data from Askja, due to failure of instruments. Today a team from IMO is flying to Askja to repair the instruments. Askja volcano is seismically active and earthquakes are regularly measured in the area. Last week about 100 earthquakes have been detected in Askja, most of them in the eastern part, with earthquake activity still ongoing. The largest earthquake in the previous week was of M2.1 on the 30th of September. IMO monitors closely the events and has already plan the implementation of more monitoring instruments in the area to allow a better coverage and detection of changes in the volcano activity Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"One minor earthquake was detected around Grímsvötn last week. The water level in the lake keeps raising at quite constant rate. The probability of a flood from Grímsvötn in the near future is still considered high. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Since the 19th of September the volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected. However, thermal anomalies are still detected in proximity of the main vent and along the lava field. Degassing is still ongoing with recent measurements estimating the flux to be between 1-3 kg/s in the last few weeks. The last flight taken to measure the lava field revealed that no new lava has been emitted in the period 17-30 September (data from University of Iceland, Icelandic Institute of Natural History, et al.). The seismic swarm which commenced on the 27th of September at 5 km NE the eruption site is still ongoing. A total of 8200 earthquakes have been measured in the area, 14 with magnitude above M3 and the largest was a M4.2 on the 2nd October. As of today there are no clear indications of ground deformation occurring in the area. It is still premature to exclude that this is magma accumulating at a depth of 5-6 km. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula Most recent gas dispersion forecast at the ground is accessible here:https://dispersion.vedur.is/map.html?run_name=Fagradalsfjall%20-%20Brennisteinsmengun%20-%20S02%20og%20SO4&center=[63.88,-22.28]&zoom=9 An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":387,"published_at":"2021-10-13T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The GPS station in Askja has been fixed and data are now streaming again to IMO’s control room. The ground deformation continues, and the total uplift corresponds now to a change of 13-14 cm since beginning of August. Last week about 17 earthquakes were detected, most of them on the eastern part of the caldera. The largest earthquake was M3, and it was located north-west of Askja. Geochemical measurements are expected to be done in the coming weeks. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"For the past two months (August and September) the seismicity in Grímsvötn has been above the normal background level and the last week two minor earthquakes were detected around the volcano. The water level in the lake is now rising at slower speed than before probably because of reduced melting rate as now the temperature at the glacier has been decreasing The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Since the 19th of September the volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected. However, thermal anomalies are still detected in proximity of the main vent and along the lava field. Degassing is still ongoing with SO2 fluxes assessed to be between 1-3 kg/s. No flights have been done since the 30th September. The seismic swarm which commenced on the 27th of September at 5 km NE the eruption site is still ongoing. A total of 10.700 earthquakes have been automatically detected in the area, 17 with magnitude above M3 and the largest was a M4.2 on the 2nd of October. As of today there are no clear indications of ground deformation occurring in the area. It is still premature to exclude that this is magma accumulating at a depth of 5-6 km. Update on the ongoing volcanic activity is available here: https://en.vedur.is/about-imo/news/earthquake-swarm-in-reykjanes-peninsula An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Graphs on lava flow from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli"},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":null,"status_text":"Slightly increased seismicity has been detected in the area in the past few months with about 50 earthquakes since June 2021. Largest earthquake measured was M2.7 on the 7th of October. The area shows no sign of unrest and no deformation is ongoing (as confirmed by InSAR images) but the seismic activity in the area is being closely monitored. Additional information on Ljósufjöll volcanic system are available here: https://icelandicvolcanoes.is//?volcano=LJO The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":388,"published_at":"2021-10-20T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Three new GPS stations and 2 new cameras have been installed at Askja. The ground deformation continues, and the total uplift corresponds now to a change of 14 cm since the beginning of August. Last week about 40 earthquakes were detected. Most of them were in the eastern part of the caldera and the largest earthquake there was M1.4. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week 4 earthquakes were detected in Grímsvötn, the largest one M1.6. The water level in the subglacial lake is still rising, but at a slower rate than before due to reduced surface melting as now the temperature at the glacier has decreased compared to the summer months. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since the 19th of September, the volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected, therefore the aviation color code has been moved down to yellow. The eruption has not been declared over as thermal anomalies are still detected in proximity of the main vent and along the lava field. Degassing is still ongoing with SO2 fluxes assessed to be between 1-3 kg/s. Only with time can we see if this is a pause or the end of the eruption. No observation flights have been made since the 30th of September. The seismic swarm which commenced on the 27th of September about 5 km NE of the eruption site is decreasing. A total of 760 earthquakes have been automatically detected this week compared to 10.700 last week. The largest earthquake this week was M3.0 on the 13th of October. GPS measurements show minor movement which could be interpreted as deep magma movement, InSAR images show no deformation, however. The most recent news update from IMO on the eruption at Fagradalsfjall is available here: https://en.vedur.is/about-imo/news/the-civil-protection-crisis-level-lowered-from-orange-to-yellow-for-the-volcano-in-fagrdalsfjall An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Data on lava discharge, extent and more from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":389,"published_at":"2021-10-27T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The ground deformation continues, and the total uplift corresponds now to a change of 15-16 cm since the beginning of August. Last week about 40 earthquakes were detected. Most of them were in the eastern part of the caldera and the largest earthquake there was M1.7. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week five earthquakes were detected in Grímsvötn, the largest one M1.3. The water level in the subglacial lake is still rising, but at a slower rate than before due to reduced surface melting as now the temperature at the glacier has decreased compared to the summer months. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since the 19th of September, the volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected, the aviation color therefore remains yellow. The eruption has not been declared over as thermal anomalies are still detected in proximity of the main vent and along the lava field. Degassing is still ongoing with SO2 fluxes assessed to be between 1-3 kg/s. Only with time can we see if this is a pause or the end of the eruption. No observation flights have been made since the 30th of September. The seismic swarm which commenced on the 27th of September about 5 km NE of the eruption site is still decreasing. A total of 330 earthquakes have been automatically detected this week compared to 760 last week. The largest earthquake this week was M2.1 on the 23rd of October. GPS measurements show minor movement which could be interpreted as deep magma movement, InSAR images show no deformation, however. The most recent news update from IMO on the eruption at Fagradalsfjall is available here: https://en.vedur.is/about-imo/news/the-civil-protection-crisis-level-lowered-from-orange-to-yellow-for-the-volcano-in-fagrdalsfjall An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Data on lava discharge, extent and more from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":390,"published_at":"2021-11-03T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The ground deformation in Askja seems to have lowered down in the past week, however the station has not sent data since 31st of October probably due to weather and transmission issues. The total uplift since the beginning of August has therefor reached a maximum of 16 cm. Last week about 30 earthquakes were detected. Most of them were in the eastern part of the caldera and the largest earthquake was M1.9 on the 2nd of November. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week nine earthquakes were detected in Grímsvötn, the largest one M1.7 on the 27th of October. The water level in the subglacial lake is still rising slowly. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since the 19th of September, the volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected, the aviation color therefore remains yellow. Degassing is still ongoing with SO2 fluxes assessed to be between 1-3 kg/s. No observation flights have been made since the 30th of September. The seismic swarm which commenced on the 27th of September about 5 km NE of the eruption site is still decreasing. A total of 150 earthquakes have been detected this week compared to 330 last week. The largest earthquake this week was M2.7 on the 31st of October. GPS measurements show minor movement which could be interpreted as deep magma movement, InSAR images show no deformation, however. The most recent news update from IMO on the eruption at Fagradalsfjall is available here: https://en.vedur.is/about-imo/news/the-civil-protection-crisis-level-lowered-from-orange-to-yellow-for-the-volcano-in-fagrdalsfjall An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Data on lava discharge, extent and more from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 20th of October small low frequency earthquakes began to be detected in Torfajökull caldera. On the 27th of October the earthquakes began to occur more regularly or every 2 minutes and lasted longer or up to 2-3 minute. Over 90 earthquakes have been detected since the 20th of October where the largest earthquake was M2 on the 27th of October. The earthquakes are mostly located in the southern part of the caldera. Low frequency earthquakes in this area do occur from time to time but they have not been seen at this intensity. Today, however, the intensity has slowed down again. A helicopter flight was performed yesterday to visually check the area, but no evidence of significant changes has been reported. The reason for these earthquakes is most likely a change in the geothermal system, however other triggers like a magmatic intrusion at depth, or due to a landslide of some sort, cannot be excluded. Additional information on Torfajökull volcanic system is available here: https://icelandicvolcanoes.is//?volcano=TOR The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":391,"published_at":"2021-11-10T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The latest GPS data confirms the uplift in Askja is still ongoing and is now showing a total uplift of 16 cm since the beginning of August. Last week about 25 earthquakes were detected. Most of them were in the eastern part of the caldera rim and the largest earthquake was M1.7 on the 10th of November. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week four minor earthquakes were detected in Grímsvötn, the largest one M1.1 on the 3rd of November. The water level in the subglacial lake is still rising slowly. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since the 19th of September, the volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected, the aviation color therefore remains yellow. Degassing is still ongoing with SO2 fluxes assessed to be between 1-3 kg/s. No observation flights have been made since the 30th of September. The seismic swarm which commenced on the 27th of September about 5 km NE of the eruption site is still decreasing. A total of 130 earthquakes have been detected this week compared to 150 last week. The largest earthquake this week was M2.4 on the 4th of November. The most recent news update from IMO on the eruption at Fagradalsfjall is available here: https://en.vedur.is/about-imo/news/the-civil-protection-crisis-level-lowered-from-orange-to-yellow-for-the-volcano-in-fagrdalsfjall An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Data on lava discharge, extent and more from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"The low frequency seismic swarm which commenced on the 20th of October is decreasing. This week only 3 earthquakes were detected compared to 90 last week. They are all located in the southern part of the caldera and the largest one was M 0.9 on the 7th of November. The reason for these earthquakes is most likely a change in the geothermal system, however other triggers like a magmatic intrusion at depth, or due to a landslide of some sort, cannot be excluded. Additional information on Torfajökull volcanic system is available here: https://icelandicvolcanoes.is//?volcano=TOR The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":392,"published_at":"2021-11-17T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The latest GPS data confirms that the uplift in Askja is slowing down, a total uplift of 16 cm has been measured since the beginning of August. Last week about 20 earthquakes were detected, most of them were in the eastern part of the caldera rim. Largest earthquake was M2.9 on the 11th of November and was located in Öskjuvatn (lake Askja). Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week two minor earthquakes were detected in Grímsvötn, the largest one M1.5 on the 13th of November. The water level in the subglacial lake is still rising slowly. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 11th of November a M5.2 earthquake occurred in Vatnafjöll area (about 7-8 km south of Hekla volcano). Over 420 earthquakes have been detected since, and the largest aftershock earthquake was M3.4. The earthquakes are located on a known seismic fault where a M5.8 earthquake occurred in 1987. Since the initial earthquake, the seismic activity around Hekla volcano has slightly increased and 10 earthquakes have been detected in the area. The largest event was M2.2 which is the largest earthquake measured in Hekla since its last eruption in 2000. No other unusual activity is currently detected in Hekla, no geochemical changes and no anomaly in the strain meters suggesting a potential reactivation of the volcanic system. No earthquakes have been detected in Hekla in the past two days. Additional information about Hekla volcanic system can be found here: https://islenskeldfjoll.is//?volcano=HEK#"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since the 19th of September, the volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected, the aviation color therefore remains yellow. Degassing is still ongoing with SO2 fluxes assessed to be between 1-3 kg/s. No observation flights have been made since the 30th of September. The seismic swarm which commenced on the 27th of September about 5 km NE of the eruption site is still decreasing. A total of 60 earthquakes have been detected this week compared to 130 last week. The largest earthquake this week was M3.2 on the 12th of November and was located east of Litli Hrútur. The most recent news update from IMO on the eruption at Fagradalsfjall is available here: https://en.vedur.is/about-imo/news/the-civil-protection-crisis-level-lowered-from-orange-to-yellow-for-the-volcano-in-fagrdalsfjall An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Data on lava discharge, extent and more from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":393,"published_at":"2021-11-24T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The latest GPS data confirms that the uplift in Askja continues, and a total uplift of 16-17 cm has been measured since the beginning of August. Last week about 30 earthquakes were detected around Askja, most of them were in the eastern part of the caldera rim. The largest earthquake was M2.4 on the 21th of November and was located in the eastern part of the caldera rim. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"NB: Reduced monitoring capability at Grímsvötn volcano – for technical failures several stations on Vatnajökull are not streaming data to IMO. These include seismometers, tiltmeter, GPS stations (for lake level monitoring and deformation), gas monitoring stations, and those webcams installed on the glacier. The monitoring capability for Grímsvötn is therefore reduced. However, 8 seismic stations within 50 km from the center of the volcano are currently streaming data to IMO in real time. The monitoring of Grímsvötn volcano currently relies on the seismic data only to detect any increase or occurrence of tremor in connection to the onset of a flood. Webcams and the radar network around Vatnajökull glacier is up and running. A team is currently in Grímsfjall working to reestablish the connection. Last week three minor earthquakes were detected in Grímsvötn, the largest one was M1.3 on the 17th of November. The water level in the subglacial lake is presumably still rising, but this cannot be confirmed as the connection with all stations on the glacier has been not working since few weeks. The Aviation Color Code for Grímsvötn volcano is maintained yellow, as the possibility for a flood in the coming weeks increases the possibility of an eruption. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week roughly 130 earthquakes were detected in Vatnafjöll, at about 8 km south of Hekla. They are of the continuation of the seismic swarm which began on the 11th of November. In this area the largest earthquake measured was M3.8 on the 18th of November. No other unusual activity is currently detected in Hekla volcano, no geochemical changes and no anomaly in the strain meters suggesting a potential reactivation of the volcanic system. No earthquakes have been detected in Hekla in the past two days and only two minor earthquakes were detected the last week. Additional information about Hekla volcanic system can be found here: https://islenskeldfjoll.is//?volcano=HEK#"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since the 19th of September, the volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected, the aviation color therefore remains yellow. Degassing is still ongoing with SO2 fluxes assessed to be between 1-3 kg/s. Thermal anomalies are occasionally detected at site by satellite and cameras. The seismic swarm which commenced on the 27th of September about 5 km NE of the eruption site is still decreasing. A total of 50 earthquakes have been detected this week compared to 60 last week. The largest earthquake this week was M2.5 on the 19th of November and was located southwest of Keilir. Latest GPS and InSAR data confirm that an uplift in ongoing since mid September over an area extending between Keilir to south of the eruption site. The total uplift is assessed to be about 2 cm. Most likely explanation for this inflation signal is a magmatic intrusion at depth (from models it has assessed to be between 15-16 km). It is possible that the earthquake swarm that started in late September south of Keilir could be related to the inflow of new magma, although no deformation was detected at the surface during this time. The most recent news update from IMO on the eruption at Fagradalsfjall is available here: https://en.vedur.is/about-imo/news/the-civil-protection-crisis-level-lowered-from-orange-to-yellow-for-the-volcano-in-fagrdalsfjall An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Data on lava discharge, extent and more from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":394,"published_at":"2021-12-01T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The GPS data show that the uplift in Askja continues, and a total uplift of 17-18 cm has been measured since the beginning of August. Last week about 13 earthquakes were detected around Askja, most of them were in the eastern part of the caldera rim. The largest earthquake was M1.1 on the 27th of November and was located northwest of the caldera rim. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"NB: This morning (01.12) between 9.30 – 10.30 UTC IMO experienced technical issues affecting the data communication with Grímsfjall. The connection with the stations has been re-established at 10.45 UTC and all data is now being received. The lake in Grímsvötn started to drain between the 21st and 22nd of November. The latest data from the GPS shows that the total drop of the ice shelf is now ~10 m. Tremor due to the water travelling under the ice has been detected since the 27th of November. The water level in the Gígjukvísl glacial river commenced to rise slowly in the past two days, revealing that the flood has started. According to calculations done by colleagues at the Institute of Earth Sciences the flood should reach its maximum around 4th or 5th of December. Total volume of the flood is expected to be between 4000-5000 m3/s. Last week three minor earthquakes were detected in Grímsvötn, the largest one was M1.6 on the 29th of November. The Aviation Color Code for Grímsvötn volcano is maintained yellow as no increased earthquake activity has been measured and no signs of unrest have been detected. A VONA was sent out on the 24th November to update on the onset of the flood: https://www.vedur.is/eldfjoll/tilkynningar/vona/?nr=350 Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 60 earthquakes were detected in Vatnafjöll, at about 8 km south of Hekla. They are of the continuation of the seismic swarm which began on the 11th of November. Last week roughly 130 earthquakes were detected so the seismic swarm appears to be slowing down. In this area the largest earthquake measured was M3.5 on the 26th of November. No other unusual activity is currently detected in Hekla volcano, no geochemical changes and no anomaly in the strain meters suggesting a potential reactivation of the volcanic system. No earthquakes have been detected in Hekla in the past week. Additional information about Hekla volcanic system can be found here: https://islenskeldfjoll.is//?volcano=HEK#"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since the 19th of September, the volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected, the aviation color therefore remains yellow. Degassing is still ongoing with SO2 fluxes assessed to be between 1-3 kg/s. Thermal anomalies are occasionally detected at site by satellite and cameras. The seismic swarm which commenced on the 27th of September about 5 km NE of the eruption site is still decreasing. A total of 75 earthquakes have been detected this week compared to 50 last week. The largest earthquake this week was M1.9 on the 27th of November and was located southwest of Keilir. Overall, the situation in Krýsuvík is unchanged since the past weeks. The most recent news update from IMO on the eruption at Fagradalsfjall is available here: https://en.vedur.is/about-imo/news/the-civil-protection-crisis-level-lowered-from-orange-to-yellow-for-the-volcano-in-fagrdalsfjall An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Data on lava discharge, extent and more from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":395,"published_at":"2021-12-08T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The uplift in Askja continues steadily and it has now reached ~18-19 cm. Last week about 15 earthquakes were detected around Askja, most of them were in the eastern part of the caldera rim. The largest earthquake was M1 on the 4th of December and was located on the eastern part of the caldera rim. There are no indications of escalating activity. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"The lake in Grímsvötn has now fully drained and the iceshelf has dropped down for about 78 meters. The peak of the glacial flood was reached on the 5th of December between 10-11 am. The total volume of the water was estimated to be 0.8 km3 and the outflow rate was roughly 3000 m3/s. On the 6th of December an earthquake with M3.6 and one of M2.3 were detected along with 6 other earthquakes around M1, within 1 hour. Due to this unusually high seismic activity the IMO decided to raise the aviation color code from Grímsvötn volcano from Yellow to Orange. However, on the following day (07.12) no further escalation occurred. The seismic tremor, attributed to the flood that had reached its end stages, was significantly reduced. No significant changes were observed in the gas or deformation data. The seismicity remained at low level. Based on these observations, IMO moved the aviation color code from orange back to yellow on the 7th of December as there were no clear indications for an imminent eruption A heat-induced depression in the ice surface (cauldron) newly formed over the past days SE of Grímsvötn. It is still unknown if this formation is due to an increase in geothermal activity or if it is related to ice-magma interaction. However, the second hypothesis is not supported by the available data as this interaction process is expected to be seen in the seismic data and such signals have not been detected. Today no signs of unrest are detected but Grímsvötn is closely monitored. A total of 44 earthquakes were detected in the last week. This seismic activity is possibly triggered by the decreased pressured above the volcano since the flood water left the Grímsvötn sub-glacial lake. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 20 earthquakes were detected in Vatnafjöll, at about 8 km south of Hekla. They are of the continuation of the seismic swarm which began on the 11th of November. Last week roughly 60 earthquakes were detected so the seismic swarm appears to be slowing down. The largest earthquake measured was M1.7 on the 2nd of December. No other unusual activity is currently detected in Hekla volcano, no geochemical changes and no anomaly in the strain meters suggesting a potential reactivation of the volcanic system. Two earthquakes were detected in Hekla in the past week, largest one was M1. There are no indications of escalating activity. Additional information about Hekla volcanic system can be found here: https://islenskeldfjoll.is//?volcano=HEK#"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The situation in Krýsuvík has remained unchanged in the past weeks. The volcanic tremor in Fagradalsfjall remains at low level and no activity at the crater has been detected. Degassing is still ongoing with SO2 fluxes assessed to be between 1-3 kg/s. Thermal anomalies are occasionally detected at site by satellite and cameras. A total of 62 earthquakes have been detected this week compared to 75 last week. The largest earthquake this week was M1.3 on the 1st of December was located northwest of Litli Hrútur. On the 3rd of December, the Icelandic Civil Protection removed the Uncertainty alert level for Fagradalsfjall. NB: As the situation in Krýsuvík seems to be quite stable since few weeks, IMO will not update it in the next VWR. However, whenever the volcanic activity should change/resume, the information will be reported again. The most recent news update from IMO on the eruption at Fagradalsfjall is available here: https://en.vedur.is/about-imo/news/the-civil-protection-crisis-level-lowered-from-orange-to-yellow-for-the-volcano-in-fagrdalsfjall An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png Data on lava discharge, extent and more from the Institute of Earth Sciences: http://jardvis.hi.is/eldgos_i_fagradalsfjalli The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":396,"published_at":"2021-12-15T11:00:00Z","entries":[{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 25 earthquakes were detected in Vatnafjöll, at about 8 km south of Hekla. They are of the continuation of the seismic swarm which began on the 11th of November. The largest earthquake measured was M3.5 on the 13th of December. No other unusual activity is currently detected in Hekla volcano, no geochemical changes and no anomaly in the strain meters suggesting a potential reactivation of the volcanic system. Two earthquakes were detected in Hekla in the past week, largest one was M1.2. There are no indications of escalating activity. Additional information about Hekla volcanic system can be found here: https://islenskeldfjoll.is//?volcano=HEK#"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"No activity at the crater has occurred since the 19th of September"},{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The uplift in Askja continues steadily and it has now reached ~18-19 cm. Last week about four minor earthquakes were detected around Askja, most of them were in the eastern part of the caldera rim. There are no indications of escalating activity. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Today no signs of unrest are detected but Grímsvötn is closely monitored. A total of 15 earthquakes were detected in the last week. The largest one was M2.2 on the 14th of December. This seismic activity is likely triggered by the decreased pressure above the volcano since the flood water left the Grímsvötn subglacial lake. The cauldron which formed during the flood has been mapped and measured (thanks to colleagues at the UI and the Coast Guard). Its depth is estimated to be at about 60 m. The origin is still uncertain, but it is clear that a local heat source caused its formation. More data will be acquired to assess if the deepening process is still ongoing or if it has stopped. The aviation color code remains at yellow for the time being. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":397,"published_at":"2021-12-22T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The uplift in Askja continues steadily and it has now reached ~20 cm. Last week about 20 minor earthquakes were detected around Askja, most of them were in the eastern part of the caldera rim. Largest earthquake measured was M1.4 on the 20th of December. There are no indications of escalating activity. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Today no signs of unrest are detected but Grímsvötn is closely monitored. Only one earthquake was detected in the last week of magnitude M2 on the 18th of December. The cauldron which formed during the flood has been mapped and measured (thanks to colleagues at the UI and the Coast Guard). Its depth is estimated to be at about 60 m. The origin is still uncertain, but it is clear that a local heat source caused its formation. More data will be acquired to assess if the deepening process is still ongoing or if it has stopped. A flight is scheduled today to observe the newly formed cauldron and new assessment will be done. The aviation color code remains at yellow for the time being. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 65 earthquakes were detected in Vatnafjöll, at about 8 km south of Hekla. They are of the continuation of the seismic swarm which began on the 11th of November. The largest earthquake measured was M3 on the 21st of December. No other unusual activity is currently detected in Hekla volcano, no geochemical changes and no anomaly in the strain meters suggesting a potential reactivation of the volcanic system. Three earthquakes were detected in Hekla in the past week, largest one was M1.3. There are no indications of escalating activity. Additional information about Hekla volcanic system can be found here: https://islenskeldfjoll.is//?volcano=HEK#"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Increased seismic activity since 21.12"}],"additional_notes":"Krýsuvík:\nYesterday, 21st of December at 18:00 UTC an intense seismic swarm began in the area of Geldingadalir (Fagradalsfjall). About 1400 earthquakes have been automatically detected, the largest earthquake was M4.9 at 09:23UTC. A total of 19 earthquakes over M3 have been detected. They are located at about 5-8 km depth and they align along a NE-SW path where the magmatic dike intruded prior to the eruption started on the 19th March. Uplift has been occurring in the area since September and has now reached a total of 4 cm. This uplift is likely connected to a magmatic intrusion at a depth of about 11 km. The earthquakes are thought to be related to this magmatic intrusion. No volcanic tremor or thermal anomalies have been detected but the area is being closely monitored. The aviation color code has been changed to ORANGE considering the elevated seismic activity in the area. It cannot be excluded that an eruption will start again in the coming days/weeks. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"},{"id":398,"published_at":"2021-12-29T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The uplift in Askja continues steadily and it has now reached ~20 cm. Last week one minor earthquake was detected around Askja, it was a M1 and was located on the eastern site of lake Askja. There are no indications of escalating activity. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Today no signs of unrest are detected but Grímsvötn is closely monitored. Only one earthquake was detected in the last week of magnitude M0.4 on the 24th of December. The origin of the cauldron that formed is still uncertain, but it is clear that a local heat source caused its formation. More data will be acquired to assess if the deepening process is still ongoing or if it has stopped. The aviation color code remains at yellow for the time being. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes were detected in Vatnafjöll, at about 8 km south of Hekla. They are a continuation of the seismic swarm which began on the 11th of November, which is decreasing. The largest earthquake measured was M1.8 on the 24th of December. No other unusual activity is currently detected in Hekla volcano, no geochemical changes and no anomaly in the strain meters suggesting a potential reactivation of the volcanic system. Additional information about Hekla volcanic system can be found here: https://islenskeldfjoll.is//?volcano=HEK#"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Increased seismic activity since 21.12"}],"additional_notes":"Krýsuvík:\nOn the 21st of December an intense seismic swarm began in the area of Geldingadalir (Fagradalsfjall). About 21.000 earthquakes have been automatically detected, the largest earthquake was M4.9 on the 21st of November. Newest InSAR image shows a magmatic intrusion at about 2 km depth. The earthquakes are the result of the magmatic intrusion and align along a NE-SW path where the magmatic dike intruded prior to the eruption started on the 19th March. There is no sign of magmatic intrusions in other locations. A total of 66 earthquakes over M3 have been detected. They are located at about 3-7 km depth. Several trigger earthquakes over M3 have been detected north of Grindavík and west of Kleifarvatn due to the pressure release of the magma intrusion. Uplift has been occurring in the area since September and has now reached a total of 4 cm. The earthquakes have been decreasing in the past days which happened prior to the eruption on the 19th of March. No volcanic tremor or thermal anomalies have been detected but the area is being closely monitored. The aviation color code has been changed to ORANGE considering the elevated seismic activity in the area. It cannot be excluded that an eruption will start again in the coming days/weeks. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"},{"id":399,"published_at":"2022-01-05T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week six minor earthquakes were detected around Askja. Largest earthquake detected was M1.2 which was located northeast of the lake. Few GPS stations have been out since 20th of December due to icing, so it is not possible to provide an update on the deformation trend. However, a team is planning to go to Askja to fix the stations in the coming days once the weather gets better. There are no indications of escalating activity. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Today no signs of unrest are detected but Grímsvötn is closely monitored. Only two earthquakes were detected in the last week, largest one M1.7. The aviation color code remains at yellow for the time being. However, it will be reassessed at the next “long term monitoring meeting” on Tuesday (11.01). Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The seismic swarm which commenced in the area of Geldingadalir (Fagradalsfjall) on the 21st of December continues to decrease. Recent GPS data and InSAR images reveal no ground deformation over the past week. It is possible the magma, which intruded to a depth of 1.5 km, started to solidify, decreasing the likelihood for an eruption in the coming days. Largest earthquake detected this week was a M3.7 on the 29th of December, it was located east of Kleifarvatn lake. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. The aviation color code remains ORANGE for the time being. However, it will be reassessed at the next “long term monitoring meeting” on Tuesday (11.01). An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":400,"published_at":"2022-01-12T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week 11 earthquakes were detected around Askja. The largest earthquake detected was a M3.1 on January 12th. The GPS stations have been out since 20th of December due to icing, so it is not possible to provide an update on the deformation trend. However, a team is planning to go to Askja to fix the stations in the coming days once the weather gets better. There are no indications of escalating activity, but the inflation is most likely still ongoing (as confirmed by GPS stations in the far field). Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Aviation color code changed to green"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic swarm which commenced in the area of Geldingadalir (Fagradalsfjall) on the 21st of December continues to decrease. Recent GPS data and InSAR images reveal no ground deformation over the past week. It is possible the magma, which intruded to a depth of 1.5 km, started to solidify, decreasing the likelihood for an eruption in the coming days. The largest earthquake detected this week was a M2.1 on January 8th, it was located Northeast of Grindavík. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. On the 7th of January, the aviation color code has been moved to YELLOW. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":"Grímsvötn:\nThe seismicity at Grímsvötn is back to normal level (with few earthquakes detected over the past 3 weeks). No unusual gas has been detected in Grímsfjall over the past months. There is still uncertainty on assessing the status of the cauldron which deepened during the last flood, so it is still difficult to evaluate the level of the geothermal activity around Grímsvötn. In light of the current available observations, the aviation color code for Grímsvötn is moved back to green. Additional information about Grímsvötn volcanic system can be found here: http://icelandicvolcanoes.is/?volcano=GRV The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"},{"id":401,"published_at":"2022-01-19T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week 7 earthquakes were detected around Askja. The largest earthquake detected was a M1.3 on January 12th, located NE of the caldera. Several GPS stations have been out since 20th of December due to icing, however, there are indications that the deformation is still ongoing at a similar rate. A team is planning to go to Askja to fix the stations in the coming weeks once the weather gets better. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake M3.2 occurred on the 13 January. No further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 8 earthquakes were detected, the largest one was M1.5 on 13 January. No other unusual geophysical/geochemical values have been recently detected in Grímsvötn. Additional information about Grímsvötn can be found here: http://icelandicvolcanoes.is/?volcano=GRV The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Persistent seismic activity is still ongoing all over the Reykjanes peninsula. GPS data and recent InSAR images did not detect clear indications of ground deformation in the area. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. Last week about 70 earthquakes were detected. the largest was a M1.3 on the 15th of January. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":402,"published_at":"2022-01-26T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week 8 earthquakes were detected in Askja. The largest earthquake detected was M1.5 on January 21st, located east of the caldera. Several GPS stations have been offline since 20th of December due to icing, however, there are indications that the deformation is still ongoing at a similar rate. Maintenance team is planning to go to Askja to fix the stations in the coming weeks once the weather conditions allow. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week 5 earthquakes were detected, largest one was M1 on 19th of January. No other unusual geophysical/geochemical values have been recently detected in Grímsvötn. Additional information about Grímsvötn can be found here: http://icelandicvolcanoes.is/?volcano=GRV The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ Lundarreykjadalur – West Iceland Last week about 170 earthquakes were detected and the largest earthquake was M3.3 on the 25th of January. The earthquake activity has been increasing in that area week by week. The seismicity is thought to be related to dip-slip fault due to very old and extinct central volcano in the area. The area is outside of active volcanic zones and no indications of magma accumulation in the area have been observed. Earthquakes have occasionally been detected in that area over time."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Persistent seismic activity is still ongoing all over the Reykjanes peninsula. Last week about 110 earthquakes were detected, the largest was a M2.2 on the 21st of January. A small swarm was detected on the 19th of January, at the south end of the previous magma intrusion, it was however short lived or only 20 minutes. GPS data and recent InSAR images did not detect clear indications of ground deformation in the area. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. A small seismic swarm was detected west of Reykjanes peninsula on the 23rd of January. About 50 earthquakes were detected and the largest earthquake was M2.6. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":403,"published_at":"2022-02-02T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week 13 earthquakes were detected in Askja. The largest earthquake detected was M2.4 on 29 January, located east of the caldera. Several GPS stations have been offline since 20th of December due to icing, however, the GPS station at ~ 7 km NE of the center of the inflation area, indicates that the deformation is still ongoing at a similar rate. Maintenance team is planning to go to Askja to fix the stations once the weather conditions allow. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK Lundarreykjadalur – West Iceland The seismic swarm which commenced in the beginning of January continues to increase. Last week about 190 earthquakes were detected and the largest earthquake was a M3.7 on the 1st of February. The swarm is located near a low-temperature geothermal area and there are no indications of accumulation of magma below the surface. These earthquakes are located away from tectonic boundaries and active volcanic areas, therefore they are intraplate earthquakes. Intraplate earthquakes are not so common in Iceland, however few swarms of this type occurred in a similar area during the 19th century and the most intense one occurred in 1974. In that occasion the swarm was characterized by a M5.5 earthquake. It cannot be ruled out that a larger earthquake can occur in the area in the coming weeks/months."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Persistent seismic activity is still ongoing all over the Reykjanes peninsula. Last week about 130 earthquakes were detected, the largest was a M2.3 on 28 January. GPS data and recent InSAR images did not detect clear indications of ground deformation in the area. No volcanic tremor or significant thermal anomalies have been recently detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"}],"additional_notes":""},{"id":404,"published_at":"2022-02-09T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week 30 earthquakes were detected in Askja. The largest earthquake detected was a M2.3 on the 9th of February, located south of the caldera. The GPS located on the NE caldera rim shows that the uplift is still ongoing, possibly at a lower rate. Several GPS stations have been offline since 20th of December due to icing, a team is planning to go next week and fix all the stations. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 3rd of February a short, but intense, seismic swarm occurred in the NE part of the caldera. It consisted of a total of about 30 earthquakes. The largest earthquake was a M4.1 followed by 2 earthquakes with magnitude over M3. Earthquakes of such intensity are not common in the area and the last time they occurred in 2017 (in the aftermath of the unrest in 2016). However, the event has not escalated any further. No unusual deformation has been detected on the GPS stations and no variations are detected at the hydrological stations monitoring the glacial rivers fed by Mýrdalsjökull glacier. Additional information about Katla volcanic system can be found here: https://icelandicvolcanoes.is//?volcano=KAT Lundarreykjadalur – West Iceland The seismic swarm which commenced in the beginning of January continues at a similar intensity. Last week about 180 earthquakes were detected and the largest earthquake was a M2.9 on the 7th of February. It cannot be ruled out that a larger earthquake can occur in that area. The seismicity is thought to be related to dip-slip fault due to very old and extinct central volcano in the area. The area is outside of active volcanic zones and no indications of magma accumulation in the area have been observed."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Persistent seismic activity is still ongoing all over the Reykjanes peninsula. Last week about 130 earthquakes were detected, the largest was a M2.4 on the 7th of February. A GPS station northwest of the eruption side shows slight NW movement suggesting a possible magma recharging at depth. However, the latest InSAR images show no detectable deformation in the area. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":405,"published_at":"2022-02-16T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week 20 earthquakes were detected in Askja. The largest earthquake detected was a M1.1 on the 12th of February. The GPS located on the NE caldera rim shows that the uplift is still ongoing, possibly at a lower rate. Several GPS stations have been offline since 20th of December due to icing. The stations will be fixed as soon as the weather allows. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK Lundarreykjadalur – West Iceland The seismic swarm which commenced in the beginning of January continues at a similar intensity. Last week about 80 earthquakes were detected and the largest earthquake was a M2.3 on the 13th of February. It cannot be ruled out that a larger earthquake can occur in that area. The seismicity is thought to be related to dip-slip fault due to very old and extinct central volcano in the area. The area is outside of active volcanic zones and no indications of magma accumulation in the area have been observed."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 10 earthquakes were detected in Bárðarbunga, the largest earthquake was a M2.4, in the southern part of the caldera"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seismic activity is still ongoing all over the Reykjanes peninsula. Last week about 95 earthquakes were detected at the eruption site and about 100 earthquakes around Grindavík. The largest earthquake was a M3 on the 14th of February and was located at about 2 km north of Grindavík. GPS stations in the peninsula reveal ongoing deformation, suggesting a likely magma recharging at depth. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":406,"published_at":"2022-02-23T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week around 20 earthquakes were detected in Askja. All were of magnitude below 2.0. The GPS located on the NE caldera rim shows that the uplift has slowed down and is possibly at a stand still. Several GPS stations have been offline since 20th of December due to icing. The stations will be fixed as soon as the weather allows. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Since the Holuhraun eruption ended (March 2015), seven earthquakes larger than M4.8 occurred in Bárðarbunga, with the last one (before 22 February) on 27 September 2020. Such earthquakes are located around the caldera and the reconstructed focal mechanism is similar for all of them and it is indicative of uplift of the caldera floor. Such uplift is in response to the caldera collapse which accompained the withdrawal of magma during the eruption and it likely reflects an ongoing recharging of the magma chamber. Such inflation periods have been known to last for up to decades and even longer. A few minor aftershocks were observed but no other indicators of unrest. Lundarreykjadalur – West Iceland The seismic swarm which commenced in the beginning of January has decreased significantly and this week only a handful of minor events were recorded."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seismic activity is still ongoing all over the Reykjanes peninsula. Last week about 40 earthquakes were detected at the eruption site and about 100 earthquakes around Grindavík. The largest earthquake was a M3.3 on the 19th of February in a minor earthquake swarm about 3 km NW of Grindavík. GPS stations in the peninsula reveal ongoing deformation, suggesting a likely magma recharging at depth, but the signal is still too small to be seen on InSAR images. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":407,"published_at":"2022-03-02T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week was quiet with around 20 earthquakes detected in Askja. All were smaller than M2.1. Data from the GPS located on the NE of the caldera rim have been reprocessed and corrected and they reveal the inflation is still ongoing at similar rate. Several GPS stations have been offline since 20th of December due to icing. The stations will be fixed as soon as the weather allows. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seismic activity is still ongoing all over the Reykjanes peninsula. Last week about 40 earthquakes were detected at the eruption site, the largest M1.5 and about 70 earthquakes around Grindavík, the largest M2.5. The largest earthquake was a M2.9 on the 28th of February just West of Kleifarvatn. GPS stations in the peninsula reveal ongoing deformation, suggesting a likely magma recharging at depth, but the signal is still too small to be seen on InSAR images. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":408,"published_at":"2022-03-09T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week only 1 earthquake was detected in Askja. It was a M0.2 on the 7th of March, located NE of the caldera. Data from the GPS located on the NE of the caldera rim continues to show inflation at a similar rate. Several GPS stations have been offline since 20th of December due to icing. The stations will be fixed as soon as the weather allows. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 20 earthquakes were detected at the eruption site, the largest was a M1.6. About 100 earthquakes were detected around Grindavík, the largest M2.2, located north of Þorbjörn. GPS stations in the peninsula reveal ongoing deformation, suggesting a likely magma recharging at depth, but the signal is still too small to be detected on InSAR images. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":409,"published_at":"2022-03-16T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week only 1 earthquake was detected in Askja. It was a M0.9 on the 9th of March, located in the center of the caldera. The week before three earthquakes, all below M1.0, were detected NE of the caldera. Data from the GPS located on the NE of the caldera rim continues to show inflation at a similar rate. Modelling indicates a magmatic intrusion at about 2 km depth with a volume change of 14x106 m3 over the last seven months. Several GPS stations have been offline since 20th of December due to icing. Technicians are still waiting for acceptable weather forecast to visit the area. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 20 earthquakes were detected at or near the eruption site, the largest was a M1.9. That is very similar activity compared to the week before. 25 earthquakes were located around Grindavík, the largest M1.5. That is less activity compared to the week before when around 100 earthquakes were detected in that area. GPS stations in the peninsula still reveal ongoing deformation, suggesting a likely magma recharging at depth, but the signal is still too small to be detected on InSAR images. Part of the GPS-network on Reykjanes peninsula is offline due to power issues but it is expected most of the come back online once the solar panels receive more daylight. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":410,"published_at":"2022-03-23T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week eight earthquakes were detected in Askja. The largest earthquake was a M2.2 located SE of lake Askja. Data from the GPS located on the NE of the caldera rim continues to show inflation at a similar rate. Recent modelling results indicate a total volume change of 14 x106 m3 over the last seven months and confirm the magmatic intrusion to be at about 2 km depth. Team of technicians headed to Askja yesterday (22.03), they are currently working on getting the GPS-stations located in the caldera back on online. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 25 earthquakes were detected at the eruption site, the largest was a M1.9, located in Nátthagakriki. About 190 earthquakes were detected around Grindavík, the largest M2.4, located west of Þorbjörn. The majority of these earthquakes detected are part of a small seismic swarm that was between 18-19th of March. There has been no further escalated activity, however the area is being closely monitored. GPS stations in the peninsula still reveal ongoing deformation, suggesting a likely magma recharging at depth, but the signal is still too small to be detected on InSAR images. Part of the GPS- network on Reykjanes peninsula is offline due to power issues but it is expected to come back online once the solar panels receive more daylight. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":411,"published_at":"2022-03-30T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 10 earthquakes were detected in Askja. The largest earthquake was a M1.3 located ~ 6km NE of lake Askja. Data from the GPS located on the NE of the caldera rim continues to show inflation at a similar rate. Several GPS-stations located in the caldera remain offline, however a team of technicians are currently working on getting them back online. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about nine earthquakes were detected. The largest earthquake was a M4.1 on 25th of March located along the eastern part of the caldera rim. Similar large earthquakes have been occurring regularly since the end of the Holuhraun eruption in February 2015 (http://hraun.vedur.is/ja/Bardarb/bb_qu_rate.html) and are likely due to the upward movement of the caldera floor caused by magma recharging at depth. No volcanic tremor has been detected and no further escalation in seismic activity. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=BAR"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 22 earthquakes were detected at the eruption site, the largest was a M1.1, located NE of Fagradalsfjall. About 40 earthquakes were detected around Grindavík, the largest M2.6, located east of Þorbjörn. The activity has decreased since last week when 190 earthquakes were detected. GPS stations in the peninsula still reveal ongoing deformation, suggesting a likely magma recharging at depth, but the signal is still too small to be detected on InSAR images. Part of the GPS- network on Reykjanes peninsula is offline due to power issues but it is expected to come back online once the solar panels receive more daylight. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":412,"published_at":"2022-04-06T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"No earthquakes were detected in Askja last week. Data from the GPS, located at about 6 km from the center of the inflation, on the NE of the caldera rim continues to show inflation at a similar rate. Several GPS-stations located in the caldera remain offline, as difficult meteorological and travel conditions prevented our technicians to access the area during the last tentative trip last week. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 55 earthquakes were detected at the eruption site, the largest was a M1.5, located west of Borgarfjall. About 220 earthquakes were detected around Sýlingarfell, about 3 km NE of Grindavík in a seismic swarm between 3rd -4th of April. The largest earthquake was a M3.3. The seismic activity has increased since last week where only 40 earthquakes were detected, however the week before that about 190 earthquakes were detected. Latest InSAR image shows no uplift around Sýlingarfell nor the peninsula, however GPS stations in the peninsula still reveal ongoing deformation, suggesting a likely magma recharging at depth. The signal is probably still too small to be detected on InSAR images. Most of the GPS- network on Reykjanes peninsula is now back online since the solar panels receive more daylight. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":413,"published_at":"2022-04-13T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Very minor seismic activity"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week 16 earthquakes were detected in Grímsvötn. Six of them occurred on the 11th of April and the largest was M2.1."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 100 earthquakes were detected at the eruption site, the largest was a M1.6. About 60 earthquakes were detected around Grindavík. GPS stations in the peninsula reveal ongoing deformation, suggesting a likely magma recharging at depth, but the signal is still too small to be detected on InSAR images. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":null,"status_text":"On 10th of April seismic activity started just NE of Langjökull glacier. About 40 earthquakes have been detected since then and the largest M2.9 on the 12th of April. People on site did not report any significant observable surficial changes. A seismic swarm with earthquakes of similar intensity was recorded in November 2007 at about 5 km NW from the area where the activity is currently ongoing. Reykjanesskagi: Increased seismic activity was observed on the tip of Reykjanes peninsula, 2-3 km NE of Mt. Sýrfell. The largest earthquake was M3.9 and occurred in the evening of 12th of April. About 600 earthquakes have been automatically detected since then and most of them at depth between 5 to 7 km. There are no clear indications of ground deformation associated with the ongoing activity as the closest GPS stations are not showing any deviation from the background. However, it cannot be excluded that the current activity is linked to magma migration at depth. The IMO keeps monitoring the area very closely. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":414,"published_at":"2022-04-20T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Minor activity and inflation continues at a similar rate"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 90 earthquakes were detected at the eruption site, the largest was a M2.8. About 115 earthquakes were detected around Grindavík, the largest was a M2.3 located 0.5 km SE of Hagafell. GPS stations in the peninsula reveal ongoing widespread deformation, suggesting a likely magma recharging at depth, however the signal is still too small to be detected on InSAR images. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. Reykjanesskagi: Increased seismic activity has been observed on the SW tip of Reykjanes peninsula over the past 2 weeks. A total of 435 earthquakes have been detected, distributed in multiple seismic clusters across the tip of the peninsula. The largest earthquake was M3.5 on 17th of April, located offshore at about 8 km SW of the Reykjanestá. There are no clear indications of ground deformation associated with the ongoing activity as the closest GPS stations are not showing any deviation from the background. However, it cannot be excluded that the current activity is linked to magma migration at depth. The IMO keeps monitoring the area very closely. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismic activity which started on 10th of April just NE of Langjökull glacier, continues. Last week about 40 earthquakes were detected, this week about 25 have been detected. The largest earthquake this week was a M2.4 on 18th of April."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":415,"published_at":"2022-04-27T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 8 earthquakes were detected in Askja, the largest was a M1.8 located west in lake Askja. Data from the GPS located on the NE of the caldera rim continues to show inflation at a similar rate. No volcanic tremor or other anomalies have been detected. Work is still in progress to get to the area and reestablish the connection to the GPS stations which are out since December 2021. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 55 earthquakes were detected at the eruption site, the largest earthquake was a M2.1. A total of about 300 earthquakes were detected around Grindavík. That includes about 110 earthquakes that were detected in a small seismic swarm on the 24th of April, about 1 km west of Þorbjörn. The largest earthquake in that swarm was M2. Other earthquakes were spread between Sýlingarfell and Húsfell. The Largest earthquake detected was a M2.1 on mount Sýlingarfell. GPS stations in the peninsula reveal ongoing widespread deformation, suggesting a likely magma recharging at depth, however the signal is still too small to be detected on InSAR images. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismic activity which started on 10th of April just NE of Langjökull glacier, continues. Last week about 25 earthquakes were detected, this week about 30 have been detected. The largest earthquake this week was a M2.4 on the 21st of April."}],"additional_notes":""},{"id":416,"published_at":"2022-05-04T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 5 earthquakes were detected in Askja, the largest was a M1.8 located east of lake Askja. Data from the GPS located on the NE of the caldera rim continues to show inflation at a similar rate. No volcanic tremor or other anomalies have been detected. Work is still in progress to access the area and reestablish the connection to the GPS stations which are out since December 2021. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 35 earthquakes were detected at the eruption site, the largest earthquake was a M2.1. A total of about 140 earthquakes were detected around Grindavík. Most of the earthquakes are located between Stóra Skógafell and Hagafell. The largest earthquake detected was a M2.8 on the 29th of April. Latest data, confirmed by GPS stations over the peninsula and InSAR images, reveal that the magma recharge at depth has currently reached the same volume as before the eruption last year. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismic activity which started on 10th of April just NE of Langjökull glacier has ceased, no earthquakes were detected in the area this week. However, a M3.4 earthquake was detected on 30th of April, located SW on Langjökull. Four other earthquakes were detected west on Langjökull where the largest earthquake was a M2.6."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 60 earthquakes were detected in a small seismicswarm that started on the 27th of April around Sandfellshæð. The largest earthquake detected was a M3.1."}],"additional_notes":""},{"id":417,"published_at":"2022-05-11T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 3 earthquakes were detected in Askja, the largest was a M1.5 located NE of lake Askja. Data from the GPS located on the NE of the caldera rim continues to show inflation at a similar rate. No volcanic tremor or other anomalies have been detected. Work is still in progress to access the area and reestablish the connection to the GPS stations which are out since December 2021. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 20 earthquakes were detected in and around Bárðarbunga caldera. The largest was a M2.6 on the 10th of May, located in the eastern part of the caldera. No volcanic tremor has been detected and no further escalation in seismic activity."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity continues at the Reykjanes peninsula. Last week about 110 earthquakes were detected at the eruption site, the largest earthquake was a M2.5. A total of about 780 earthquakes were detected around Grindavík. Most of the earthquakes are located between Stóra Skógafell and Hagafell. The largest earthquake was a M2.2 on the 8th of May located east of Grindavík. About 740 earthquakes were detected in Kleifarvatn in a seismic swarm which occurred between 5th – 7th of May. The largest earthquake was a M3.5, two other earthquakes over M3 were detected. Latest data, confirmed by GPS stations over the peninsula and InSAR images, reveal that the magma recharge at depth has currently reached the same volume as before the eruption last year. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 420 earthquakes were detected at the tip of the Reykjanes peninsula in 3 small seismic swarms. The largest earthquake was a M3.3 on 10th of May, located NE of Kinn."}],"additional_notes":""},{"id":418,"published_at":"2022-05-18T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 14 earthquakes were detected in Askja, the largest was a M1.8 located NW of lake Askja. GPS stations are now back online, and the newest data confirms continued uplift in the caldera. The GPS station KASC which is located in the caldera at about 3 km north of lake Askja shows uplift of ~10 cm since middle of October 2021. Most GPS station are now online, however a few remain offline and work is in progress. The data collected during the winter time will be analysed as soon as possible to understand if there have been changes in deformation rate and direction of displacement, the modelling will help constraining the volume in place and geometry of the inflating source. No volcanic tremor or other anomalies have been detected. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"A total of 10 earthquakes were detected, no escalated activity or volcanic tremor wad detected."},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":null,"status_text":"On 14th of May a M4.8 earthquake was detected in Þrengslin. Several earthquakes followed as a result of aftershocks and a total of 140 earthquakes were detected from 14-17th of May. The earthquake is a typical strike-slip motion and is unlikely to be related to the magma recharge in Reykjanesskagi."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 300 earthquakes were detected in Krýsuvík, the largest earthquake was a M2.6 on the 13th of May, located south of Fagradalsfjall. Latest data, confirmed by GPS stations over the peninsula and InSAR images, reveal that the magma recharge at depth (>15 km) localized SE of Fagradalsfjall has currently reached the same volume as before the eruption last year. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"More than 4000 earthquakes have been detected nearby Eldvorp in the Reykjanes/Svartsengi volcanic system in the past week. A total of 17 earthquakes were detected with a magnitude above M3 and two above M4. The largest earthquake detected was a M4.3 on the 15th of May at 17:38 UTC. The seismicity is located at a depth between 4 and 6 km. Recent deformation observations (both GPS and InSAR) identified ground deformation ongoing west of Thorbjörn caused by magmatic intrusion. Preliminary modelling results indicate that the source of such inflation is located at a depth between 4-5 km. The inflation has started around the end of April/ beginning of May. This intrusion is occurring at the same location as in 2020, when three inflation events were detected in the surrounding of Mt. Thorbjörn. Considering the increased seismic activity and the ongoing deformation in the Reykjanes/Svartsengi volcanic system the aviation color code was elevated from GREEN to YELLOW on 16 May. The Civil Protection Department of Iceland elevated their alert level to UNCERTAINTY level on 15 May. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY https://www.vedur.is/eldfjoll/tilkynningar/vona/?nr=374"}],"additional_notes":""},{"id":419,"published_at":"2022-05-25T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about eight earthquakes were detected in Askja, the largest was a M1.8 located NW of lake Askja in the caldera rim. The GPS stations surrounding Askja are now all back online. They all show continued uplift in the caldera. The data collected during the wintertime has been analyzed and shows the uplift has continued at a slight slower rate. Data show that from August 2021 until May 2022 there has been a total uplift of about ~30 cm in the caldera. Latest model result shows a median volume change of about ~14-18 million m3 from 15th of August – 19th of May 2022 located at a depth of about 2 km. No volcanic tremor or other anomalies have been detected. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 on 20th of May, 8 small earthquakes followed, there was no further escalated activity"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 200 earthquakes were detected in Krýsuvík, the largest earthquake was a M1.1 on the 22nd of May, located north of Fagradalsfjall. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":null,"status_text":"A small seismic swarm occurred on 24th of May south of Langjökull, north of Sandfell where 30 earthquakes were detected, largest was a M2.8, there was no further escalated activity"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"More than 2700 earthquakes have been detected nearby Eldvorp in the Reykjanes/Svartsengi volcanic system in the past week. A total of 7 earthquakes were detected with a magnitude above M3. The largest earthquake detected was a M3.6 on the 22nd of May at 09:57 UTC. The seismicity is located at a depth between 4 and 6 km. Recent deformation observations (both GPS and InSAR) continue to show ground deformation ongoing west of Thorbjörn caused by magmatic intrusion. Modeling results indicate that the source of such inflation is located at a depth between 4-5 km. The inflation, started at the end of April/ beginning of May, is showing a quite stable trend. The intrusion is occurring at the same location as in 2020, when three inflation events were detected in the surrounding of Mt. Thorbjörn. About 300 earthquakes were detected out in the ocean, southwest of Reykjanestá. The largest earthquake detected was a M3.4 on the 20th of May. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY https://www.vedur.is/eldfjoll/tilkynningar/vona/?nr=374"}],"additional_notes":""},{"id":420,"published_at":"2022-06-01T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about six earthquakes were detected in Askja, the largest was a M1.7 located about 1.5 km East of lake Askja. The GPS stations surrounding Askja continue to show uplift in the caldera. No volcanic tremor or other anomalies have been detected. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.4 earthquake was detected on 28th of May inside the caldera, a total of 18 earthquake was detected. No further activity escalated."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 80 earthquakes were detected in Krýsuvík, the largest earthquake was a M1.1 on the 27th of May, located NE of Fagradalsfjall. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"More than 1800 earthquakes have been detected nearby Eldvörp in the Reykjanes/Svartsengi volcanic system in the past week. Only one earthquake was detected above M3, that was a M3.2 on the 29th of May located north of Þorbjörn. The seismicity is located at a depth between 3 and 5 km. Recent deformation observations (both GPS and InSAR) show that the current intrusion in Svartsengi has temporarily halted. We cannot exclude the activity will resume in the area in the coming days/weeks. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY https://www.vedur.is/eldfjoll/tilkynningar/vona/?nr=374"}],"additional_notes":""},{"id":421,"published_at":"2022-06-08T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 12 earthquakes were detected in Askja, the largest was a M1.6 located about 1.0 km East of lake Askja. The GPS stations surrounding Askja continue to show steady uplift in the caldera. No volcanic tremor or other anomalies have been detected. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 40 earthquakes were detected in Krýsuvík, the largest earthquake was a M3.2 on the 03rd of June, located W of Kleifarvatns. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"The rate of the uplift ongoing around Svartsengi/Þorbjörn area has significantly reduced during the last week or so. At the same time, the seismicity has also been declining. This indicates that there is currently a pause in the process causing the inflation, interpreted to mean that the magma migration to this region has stopped for the time being. This pause might be temporary, and it is considered likely that new intrusions and enhanced seismic activity will resume in the coming weeks along the peninsula. For the time being the aviation color code has been moved back to green as there are no signs of escalating activity in Reykjanes/Svartsengi volcanic system. The Civil Protection Department of Iceland maintains their alert level to UNCERTAINTY for this area. Around 700 earthquakes have been detected nearby Eldvörp in the Reykjanes/Svartsengi volcanic system in the past week. Only one earthquake was detected M3.0, on the 08th of June located SW of Fagradalsfjall. The seismicity is located at a depth between 3 and 5 km. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY https://www.vedur.is/eldfjoll/tilkynningar/vona/?nr=374"}],"additional_notes":""},{"id":422,"published_at":"2022-06-09T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 60 earthquakes were detected in Askja, the largest was a M2.6 located on the eastern rim of the caldera. Most of the activity this week was on the eastern side which is more active and is traditionally linked to geothermal activity. The GPS stations surrounding Askja continue to show steady uplift in the caldera. No volcanic tremor or other anomalies have been detected. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week around 100 earthquakes were detected in the extended Krýsuvík Area, including the eruption site from 2021, the largest earthquakes were two M2.4 on the 9th of June, located W of Kleifarvatns. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"The rate of the uplift ongoing around Svartsengi/Þorbjörn area has further declined in the last week and is now at a near standstill. Similarly, the seismicity has been declining and has seen a definite rate change since June 5th with the exception of a M3.9 at 01:14 am on June 14th accompanied by a small aftershock activity, but has now mostly passed and reached back the steady rate since June 5th. This indicates that there is currently a pause in the process causing the inflation, interpreted to mean that the magma migration to this region has stopped for the time being. This pause might be temporary, and it is considered likely that new intrusions and enhanced seismic activity will resume again in the coming weeks or months along the peninsula. The aviation color code has been moved back to green for the time being as there are no signs of escalating activity in Reykjanes/Svartsengi volcanic system. The Civil Protection Department of Iceland removed the UNCERTAINTY level on June 10th. Around 1000 earthquakes have been detected in the area of Svartsengi/Þorbjörn with the largest event measuring at M3.9 in June 14th. The seismicity is located at a depth between 1 and 5 km. More information on the Reykjanes-Svartsengi volcanic system is here: https://icelandicvolcanoes.is//?volcano=REY https://www.vedur.is/eldfjoll/tilkynningar/vona/?nr=374"}],"additional_notes":""},{"id":423,"published_at":"2022-06-15T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 20 earthquakes were detected in Askja, all below magnitude 2.0. Most of the activity this week was on the eastern side which is more active and is traditionally linked to geothermal activity. The GPS stations surrounding Askja continue to show steady uplift in the caldera. No volcanic tremor or other anomalies have been detected. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Small seismic swarm on June 20th, one earthquake w. M 3.3 occurred on that day at 21:24 UTC"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"The aviation color code is moved from yellow to green as there are no signs of shallow magma intrusions in the area since December 2021, and seismic activity has reached a new background level. Deformation modeling using InSAR and GPS data still confirm deep-seated re-charge of magma under Fagradalsfjall area at >16 km depth. Last week around 100 earthquakes were detected in the extended Krýsuvík Area, which includes the eruption site from 2021. Three events with magnitude over 2.0 were detected. No volcanic tremor or significant thermal anomalies have been observed. The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"About 560 events were detected in the Svartsengi area. The largest event was a M 2.7 on June 17th within 2.0 km west of Thorbjörn. GPS data shows continued deflation in the area."}],"additional_notes":""},{"id":642,"published_at":"2022-06-22T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 20 earthquakes were detected in Askja, all below magnitude 2.0. Most of the activity this week was on the eastern side which is more active and is traditionally linked to geothermal activity. The GPS stations surrounding Askja continue to show steady uplift in the caldera. No volcanic tremor or other anomalies have been detected. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Small seismic swarm on June 20th, one earthquake w. M 3.3 occurred on that day at 21:24 UTC"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"The aviation color code is moved from yellow to green as there are no signs of shallow magma intrusions in the area since December 2021, and seismic activity has reached a new background level. Deformation modeling using InSAR and GPS data still confirm deep-seated re-charge of magma under Fagradalsfjall area at >16 km depth. Last week around 100 earthquakes were detected in the extended Krýsuvík Area, which includes the eruption site from 2021. Three events with magnitude over 2.0 were detected. No volcanic tremor or significant thermal anomalies have been observed. The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"About 560 events were detected in the Svartsengi area. The largest event was a M 2.7 on June 17th within 2.0 km west of Thorbjörn. GPS data shows continued deflation in the area."}],"additional_notes":""},{"id":424,"published_at":"2022-06-29T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"About 215 events were detected on the Reykjanes Peninsula. All events were below M2. GPS data shows continued deflation in the area. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"},{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 15 earthquakes were detected in Askja, the largest earthquake was of M2.5 in the northern rim of the caldera. Most of the activity this week was on the eastern side which is more active and is traditionally linked to geothermal activity. The GPS stations surrounding Askja continue to show steady uplift in the caldera. No volcanic tremor or other anomalies have been detected. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 on the 27th of June. M3.5 on the 29th of June."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"About 20 earthquakes occurred within or around the Katla caldera. The conductivity of Markarfjót increased during the past week, but has started to decrease again. Most likely explanation for this is a leakage of geothermal water into the river from the glacier. No indications are of jökulhlaup or volcanic activity is observed."},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":null,"status_text":"A seismic swarm on the 23rd- 24th of June. One earthquake M4.6 occurred at 22:12. M3.7 occurred at 22:29"}],"additional_notes":"Bárðarbunga:\nOn the 27th of June, an earthquake of M3.3 occurred at 05:49 in the northern rim of the caldera. On the 29th of June an earthquake of M3.5 occurred at 08:16, also in the northern rim of the caldera. In total, 8 earthquakes were located in the Bárðarbunga caldera during the past week. An overview of the seismicity in the Bárðarbunga caldera is available here: http://hraun.vedur.is/ja/arg/png/bardarbunga_15d.png\nLangjökull:\nAbout 170 earthquakes were located in the Langjökull area during the past week. On the 23rd of June a seismic swarm started in western Langjökull with an earthquake of M4.6 at 22:12. A M3.7 occurred at 22:29 the same day. An overview of the seismicity in Langjökull is available here: http://hraun.vedur.is/ja/arg/png/langjokull_15d.png"},{"id":425,"published_at":"2022-07-06T10:52:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Similar seismic activity detected at Askja as last two weeks, 24 earthquakes were reviewed and largest event of magnitude M2.0 at the northern rim of the caldera. The GPS stations surrounding Askja continue to show steady uplift in the caldera. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Small seismic swarm 22 km SW of Eldey since July 2nd. Largest events July 4th M3.2, July 5th M3"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"About 700 events were detected on the Reykjanes Peninsula. About 300 of these occurred during a swarm of microearthquakes on June 30th, 4-5 km west of Grindavík village. GPS data shows continued deflation in the area. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"}],"additional_notes":""},{"id":426,"published_at":"2022-07-13T10:50:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Few earthquakes were detected at Askja during last 7 days. The GPS stations surrounding Askja continue to show steady uplift in the caldera. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"One M3 event since last report, 22 km SV of Eldey, on July 6th"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3 on July 10th in the caldera"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes observed. On July 12th two ~M3 earthquakes (Mw 3.1 and ~M3) were detected 4 km NE of Reykjanes Geothermal Power Plant. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png"}],"additional_notes":""},{"id":427,"published_at":"2022-07-20T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"In the morning of 19th of July, a tremor signal occurred in the vicinity of Askja, visible on many seismic stations in the highlands and the north and east parts of Iceland. The source of the tremor was a swarm of small deep earthquakes (15+ km deep) a few kilometers northeast of Askja’s main caldera. The tremor signal lasted for around 10 minutes, then another one occurred a few minutes later that lasted for around 2-3 minutes. Swarms like these are not common around Askja, but are known to happen. It is likely that they occur due to movements of magma. Recent satellite images and GPS measurements indicate ongoing inflation. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Last weekend, a rise in electrical conductivity was noticed in the river Jöklusá á Sólheimasandi, that flows from Sólheimajökull glacier, an outlet glacier from Mýrdalsjökull ice cap. The EC values are very high for this time of year and we have received reports of sulfur smell in the area. This indicates that geothermal water has been flowing from the glacier into the river. Only a few earthquakes have been detected in the river’s drainage basin in the recent week. It’s worth mentioning that the growing glacier lagoon in front of the glacier works as a buffer on events like this, both diluting and delaying the EC signal. Additional information about Katla volcanic system can be found here: https://icelandicvolcanos.is/?volcano=KAT"}],"additional_notes":""},{"id":428,"published_at":"2022-07-27T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The tremor signal that was detected last week is no longer detected. Newest interferogram and GPS signals show that the uplift has now reached a total of 35 cm and the magma sill is located at about 2 km depth. This week about 18 earthquakes were detected east in Askja caldera rim. The largest earthquake was a M2.1. There has been no further escalated activity, however the area is being closely monitored. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes M4.9 and M4.4 were detected on 24th of July. No further escalated activity."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"The electrical conductivity detected last week has now decreased and returned to its usual with no further escalated activity. This week about 30 earthquakes were detected where the largest earthquake was a M2.8. Additional information about Katla volcanic system can be found here: https://icelandicvolcanos.is/?volcano=KAT"}],"additional_notes":""},{"id":429,"published_at":"2022-08-03T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Last week about 5 earthquakes were detected, all within 1 km east of lake Askja. Largest earthquake was a M1.5. The uplift continues at a similar rate. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. Additional information about Askja volcanic system can be found here: https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"Eight earthquakes occurred within two hours on the 2nd of August with the largest one with M3.7 located about 2 km north east of Grímsfjall. This activity has been considered unusual for Grímsvötn and therefore the aviation color code was changed to yellow. No earthquakes have been detected today and no volcanic tremor or significant anomalies in the geochemistry have been detected in the area but the area is being closely monitored. The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/?nr=386 Additional information about Grímsvötn volcanic system can be found here: https://icelandicvolcanos.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Small seismic swarm occurred on 30th of July with the largest event of M4.2"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"On 30th of July an intense seismic swarm began on the Reykjanes Peninsula and the aviation color code was raised to yellow. Latest InSAR and GPS measurements show a new magmatic dike is propagating in the area of Fagradalsfjall at about 1.3 km depth with an inflow rate of 52 m3/s and a volume change of about 10.2 million cubic meters. This dike is located north of the dike that formed prior to the eruption in 2021 and extends towards Keilir mountain. A total of 11000 earthquakes have been automatically detected since the swarm began with 17 earthquakes over M4 and one M5.5 earthquake. An eruption is considered likely to occur, in case this would be most likely an effusive eruption with minor disruption to aviation traffic. No volcanic tremor or significant thermal anomalies have been detected but the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":430,"published_at":"2022-08-10T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Deformation continues at a similar rate. Earthquake activity is minor. No escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"The Aviation Color Code was moved back to Green on 9 Aug. Activity is back to normal."},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The effusive eruption that commenced on August 3rd is still ongoing. It originates from 100 m long fissure located at about 1.5 km NE of the fissure which erupted in 2021. Extrusion rates have been measured by colleagues at University of Iceland, Institute of Earth Sciences, in the first days of the eruption and gave values of 32 m3/s (on August 3rd) and 18 m3/s (on August 4th). Gas plume raises from the fissure and reaches altitudes not higher than 1.5 km. SO2 fluxes have been measured by DOAS traverse and values were between 80-180 kg/s on August 5th. A new traverse is expected to be done today. Earthquake activity has decreased steadily and significantly since the eruption started and is today at normal background levels. During the last 7 days, there have been 6 earthquakes recorded above M3, the largest one M4.1 on the 7th of August. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/"}],"additional_notes":""},{"id":431,"published_at":"2022-08-17T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"Deformation continues at a similar rate. Earthquake activity minor. No escalation."},{"volcano_code":"KRY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption that commenced in Meradalir on 3 August, has been ongoing now for two weeks. The original fissure has collapsed into one main single crater from which lava and volcanic gases are released. Latest lava discharge measurements done on 16th of August (by colleagues at University of Iceland and LMI) reveal that the eruption intensity has been decreasing significantly over time and show a rate of 2-3 m3/s, however the uncertainty on these values is quite high. The lava area at 1.28 km2 and the cubic volume of 11.13 million m3. Because of low wind speed in the past day, the gas plume raised up to 2.4 km asl. However, since this night the wind is getting stronger than 20 m/s and the plume is quickly drifted to the NW. No recent SO2 fluxes are available. Seismic activity continues at a normal background level with a total of 200 earthquakes detected within an area extending between Mt. Keilir and Borgarfjall. The largest earthquake detected was a M1.8 on the 14th of August, located about 2.3 km SW of Mt. Keilir. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ https://icelandicvolcanos.is/?volcano=KRY The recent forecast for SO2 dispersal is available here: https://en.vedur.is/volcanoes/fagradalsfjall-eruption/volcanic-gases/"}],"additional_notes":""},{"id":432,"published_at":"2022-08-24T11:30:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The volcanic fissure eruption in Meradalir, which commenced on the 3rd of August, ceased to issue lava on the 21 of August. Volcanic tremor started to decrease steadily from the 18th and stopped completely during the night of 21st. The activity at the crater ceased at the same time, with no visible extrusion of fresh lava. No volcanic tremor has been detected since. Some degassing is still ongoing from the lava field and the main crater. Because of this low level of activity the aviation color code was moved from orange to yellow at 20220822/1052Z This cessation in activity likely marks a new phase in the Reykjanes volcano-tectonic unrest, but it is too premature to determine if and when the seismic activity will resume and when a new dike propagation or eruption will start again. The seismicity on the Reykjanes peninsula has decresed where about 370 minor earthquakes were mesured compared to 700 events in the previous week. Most activity by the Merardalir volcano but also in orther areas. There were 2 events larger than M3.0 one of M3.2 on the Reykjanes ridge about 100km southwest of the peninsula on 2022-08-19 at 04:42, another of M3.2 near Reykjanestá close to the SW most part of the peninsula at 2022-08-20 at 05:45. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ https://icelandicvolcanos.is/?volcano=ASK"}],"additional_notes":""},{"id":433,"published_at":"2022-08-31T11:00:00Z","entries":[{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"No lava has been emitted since 21st of August, at the fissure that opened August 3rd in Meradalir. The seismic activity now continues at a background level with about 320 earthquake detected this week, which is similar to last week. The seismicity is spread over the peninsula with clusters of earthquakes at the eruption site, Kleifarvatn and Reykjanestá. The largest earthquake detected was a M2.7 on the 29th of August, located in Krókamýri. Recent deformation data by InSAR images show no signs of inflation in the area. It is considered unlikely that the eruption will resume at the same crater, however new intrusions are likely to occur in the area and therefore the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ https://icelandicvolcanos.is/?volcano=KRY"},{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":434,"published_at":"2022-09-07T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The situation remains unchanged. Inflation continues at a similar rate and the seismicity is minor."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity in the Reykjanes peninsula has slightly increased from the past week. About 440 earthquake were detected this week, whereas 320 earthquakes were detected last week. The seismicity is spread over the peninsula with clusters of earthquakes at the eruption site, Kleifarvatn and Reykjanestá. The two largest earthquakes detected were a M3.5 on the 6th of September, located about 1 km southwest of Keilir, in the area of the mapped dike and a M2.9 on the 7th of September in a similar location. Recent deformation data by InSAR images and GPS stations show no signs of inflation in the area. It is considered unlikely that the eruption will resume at the same crater, however new intrusions are likely to occur in the area and therefore the area is being closely monitored. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ https://icelandicvolcanos.is/?volcano=KRY"}],"additional_notes":""},{"id":435,"published_at":"2022-09-14T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The situation remains unchanged. Inflation continues at a similar rate and the seismicity is minor."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week three earthquakes have been detected in Grímsvötn, the largest one was a M1.4 on the 13th of September. Geochemical data show no variation over the past week. A team of technicians are currently working in Grímsvötn, to restore GPS signal and tilt meter. Grímsey (North Iceland): On the 8th of September a seismic swarm began East of Grímsey. Total of 8800 earthquakes have been detected with the largest earthquake measured on 8th of September with a magnitude of 4.9. About 7 earthquakes over M4 and 164 over M3 have been detected. The seismicity is due to a strike-slip fault due to the divergent plate boundary going through Iceland. The activity is therefore not considered to be related to magmatic intrusion. Similar swarms occurred in recent times in 2018 and 2013."},{"volcano_code":"KRY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity in the Reykjanes peninsula has slightly decreased from the past week. About 300 earthquakes were detected this week, whereas 440 earthquakes were detected last week. The seismicity is spread over the peninsula with clusters of earthquakes at the eruption site, Bláfjöll and Reykjanestá. The largest earthquake detected was a M2.9 on the 7th of September, located about 1 km southwest of Keilir, in the area of the mapped dike. Recent deformation data by InSAR images and GPS stations show no signs of inflation in the area. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ https://icelandicvolcanos.is/?volcano=KRY"}],"additional_notes":""},{"id":436,"published_at":"2022-09-21T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The situation remains unchanged. Inflation continues at a similar rate and the seismicity is minor."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":437,"published_at":"2022-09-28T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The situation remains unchanged. Inflation continues at a similar rate and the seismicity is minor."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Fagardalsfjall: This week the seismic activity in the Reykjanes peninsula has slightly decreased from the past week. About 220 earthquakes were detected this week, whereas 260 earthquakes were detected last week. The seismicity is spread over the peninsula with clusters of earthquakes at the eruption site, west of Kleifarvatn and Reykjanestá. The largest earthquake detected was a M2.5 on the 16th of September, located about 1.5 km west of Kleifarvatn. Recent deformation data by InSAR images and GPS stations show no signs of inflation in the area. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ https://icelandicvolcanos.is/?volcano=FAG Grímsey (North Iceland): The seismic swarm that began on the 8th of September, east of Grímsey, has decreased significantly. About 340 earthquakes have been automatically detected, whereas last week about 3000 earthquakes were detected. About 210 earthquakes have been manually located and the largest earthquake detected was a M2.9 on the 23rd of September. The seismicity is due to a strike-slip fault due to the divergent plate boundary going through Iceland. The activity is therefore not considered to be related to magmatic intrusion. Similar swarms occurred in recent times in 2018 and 2013."},{"id":438,"published_at":"2022-10-05T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The situation remains unchanged. Inflation continues at a similar rate and the seismicity is minor."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"This week the seismic activity in the Reykjanes peninsula has slightly decreased from the past week. About 110 earthquakes were detected this week, whereas 220 earthquakes were detected last week. The seismicity is spread over the peninsula with clusters of earthquakes at the eruption site, west of Kleifarvatn, northwest of Þorbjörn. The largest earthquake detected was a M2.5 on the 5th of October, located about 4.5 km west of Kleifarvatn. Recent deformation data by InSAR images and GPS stations show no signs of inflation in the area. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ https://icelandicvolcanos.is/?volcano=FAG Grímvötn: On the 29th of September an unusual tremor pulse occurred in Grímsvötn with minor seismic activity associated. The source of the tremor is still uncertain. However, additional geophysical and geochemical data do not show relevant changes (e.g. deformation, gas emission, ice sheet level). A total of 13 earthquakes have been detected with the largest of M1.3 on the 28th of September, located on Grímsfjall. The area is being closely monitored. Grímsey (North Iceland): The seismic swarm that began on the 8th of September, east of Grímsey, has decreased significantly. About 90 earthquakes have been automatically detected, whereas last week about 340 earthquakes were detected. About 210 earthquakes have been manually located and the largest earthquake detected was a M2.3 on the 29th of September. The seismicity is due to a strike-slip fault due to the divergent plate boundary going through Iceland. The activity is therefore not considered to be related to magmatic intrusion. Similar swarms occurred in recent times in 2018 and 2013."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":439,"published_at":"2022-10-12T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The situation remains unchanged. Inflation continues at a similar rate and the seismicity is minor."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"A total of 180 earthquakes were detected this week, which is similar to last week. The seismicity is spread over the peninsula with clusters of earthquakes at the eruption site, west of Kleifarvatn, northwest of Þorbjörn. The largest earthquake detected was a M2.3 on the 11th of October, located about 3.2 km west of Kleifarvatn. Recent deformation data by InSAR images and GPS stations show no signs of inflation in the area. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png The list of issued VONA is available here: https://www.vedur.is/eldfjoll/tilkynningar/vona/ https://icelandicvolcanos.is/?volcano=FAG Grímvötn: In the past week the lake in Grímsvötn started to drain indicating the beginning of a flood. A small jökulhlaup is expected and the peak in discharge rate from the lake is expected to be reached tomorrow or the following day. There are currently no indications of volcanic tremor or elevated seismicity around Grímsvötn and the gas monitoring station does not show changes in the emission composition. Volcanic activity at Grímsvötn has, however, been gradually increasing over time, primarily indicated by surface deformation which exceeded the level it was at prior to the 2011 eruption back in 2020 and continues to rise. A total of 13 earthquakes have been detected, the largest earthquake was a M2.4 on the 5th of October. This does not mean that an eruption is imminent, but an eruption could be triggered by depressurization by the anticipated jökulhlaup or occur regardless, possibly (like in 2011) with very weak precursory activity and short warning time. Therefor the aviation colour code has been raised to yellow and the area is being closely monitored. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":440,"published_at":"2022-10-19T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"The situation remains unchanged. Inflation continues at a similar rate and the seismicity is minor. As of today, IMO is not getting data from the three GPS stations located within the caldera. Plans are in place to visit the site to re-establish connection and collect data again as soon as weather allows. All GPS stations outside the caldera are sending data regularly."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"A total of 133 earthquakes were detected this week, which is similar to last week. The seismicity is spread over the peninsula with clusters of earthquakes at the eruption site, west of Kleifarvatn, northwest and northeast of Þorbjörn. The largest earthquake detected was a M3.5 on the 12th of October, located about 3 km west of Kleifarvatn. Recent deformation data by InSAR images and GPS stations show no signs of inflation in the area. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png https://icelandicvolcanos.is/?volcano=FAG Grímvötn: Last week the lake in Grímsvötn started to drain and the peak of the small jökulhlaup was reached in Gígjukvísl river on October 16th. There are currently no indications of volcanic tremor or elevated seismicity around Grímsvötn and the gas monitoring station does not show changes in the emission composition. Volcanic activity at Grímsvötn has, however, been gradually increasing over time, primarily indicated by surface deformation which exceeded the level it was at prior to the 2011 eruption back in 2020 and continues to rise. A total of 19 earthquakes have been detected in the last week, the largest earthquake was a M2.4 on the 15th of October. The aviation color code was raised to yellow on the 10th October because of the possibility the flood would trigger an eruption. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Four small earthquakes were located in Hekla volcano yesterday morning, October 18th, the largest M1.2. Three of the earthquakes were located in the northwest of Hekla and one in the southeast. Elevated level of CO2 have been measured in October, but this values are still within ranges observed previously in the past years. There are currently no indications of volcanic tremor or change in the GPS, but Hekla is known for short warning time before eruptions. The volcano is closely monitored. https://icelandicvolcanoes.is//?volcano=HEK"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 36 earthquakes have been detected in Katla volcano, most of them on October 16th. The largest were M3.8 and M3.0 on October 16th. Most of the earthquakes were located near glacial cauldrons 10 and 11, in the eastern part of the caldera. High level of H2S have been measured at the outlet of the glacier on the same day indicating geothermal water discharging from the cauldrons. Therefore, Civil protection closed ice-caves in the east part of Mýrdalsjökull, but they have been opened again with instructions to guides to use gas detectors the following day. Conductivity is still rather high in Múlakvísl river and there is some sulfur smell of the river suggesting the geothermal water leakage is still ongoing. The river and volcano are closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":441,"published_at":"2022-10-26T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"On the 22nd of October a seismic swarm began north and northeast of Herðubreið, about 20 km northeast of Askja. A total of 2900 earthquakes have been detected with the largest earthquake a M4.1 on the 22nd of October. Swarms like this are common in this area, however the M4.1 earthquake is the largest detected in this area. The second largest was a M4 in May 1998. The earthquakes are most likely due to strike-slip faults due the divergent plate boundary going through the area. The area is being closely monitored. In Askja, the situation remains unchanged. Inflation continues at a similar rate and the seismicity is minor. As of today, IMO is not getting data from the three GPS stations located within the caldera. Plans are in place to visit the site to re-establish connection and collect data again as soon as weather allows. All GPS stations outside the caldera are sending data regularly. https://icelandicvolcanos.is/?volcano=ASK"},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"A total of 320 earthquakes were detected this week, which is an increase since last week. The seismicity is spread over the peninsula with clusters of earthquakes at the eruption site, west of Kleifarvatn, northeast of Þorbjörn, south of Stóra-Skógfell, Reykjanestá and in Brennisteinsfjöll. The largest earthquake detected was a M3.1 on the 23rd of October, located about 1 km southeast of Stóra-Skógfell. The second largest earthquake was a M3 on the 21st of October in Breinnisteinsfjöll. Recent deformation data by InSAR images and GPS stations show no signs of inflation in the area. An overview of the seismicity in the Reykjanes peninsula is available here: http://hraun.vedur.is/ja/arg/png/reykjanes_15d.png https://icelandicvolcanos.is/?volcano=FAG"},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"About 16 earthquakes have been detected this week, which is similar to last week. The largest earthquake detected was a M2.9 on the 20th of October located on Grímsfjall. Overall, the seismic activity in Grímsvötn for the month of October, is well above what is considered the background level. No volcanic tremor has been detected, however the area is being closely monitored. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 19 earthquakes have been detected in Katla volcano which is fewer than last week, when 36 earthquakes were detected. Most are located in the southern part of the caldera. No unusually high values of H2S were measured at the glacier edge of Kötlujökull since the 16 October. No volcanic tremor has been detected, however the area is being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":442,"published_at":"2022-11-02T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"As the situation in Fagradalsfjall is unchanged since several months, the decision is taken to suspend the report for this volcanic area. IMO will report again when relevant changes will be detected."},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seismic activity in Grímsvötn is still unusually high. About 13 earthquakes have been detected this week and the largest earthquake detected was a M2.4 on the 28th of October located on Grímsfjall. No changes in the geochemical parameters are observed. The area keeps being closely monitored. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 12 earthquakes have been detected in Katla volcano which is fewer than last week, when 19 earthquakes were detected. Most are located inside the caldera. The largest earthquake was a M2.1 on the 27th of October. No volcanic tremor has been detected, however the area is being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":"Askja (and Herðubreið): The seismic swarm which began on the 22nd of October in Herðubreið continues at a slightly lower rate than before and is located north and southwest of Herðubreið. The largest earthquake was a M3.2 on 31st of October. Swarms like this are common in this area, and they are most likely due to strike-slip faults due the divergent plate boundary going through the area. There are no evidences of deformation in the area concurrent the ongoing seismic activity. The area is being closely monitored. In Askja volcano, the situation remains unchanged. Inflation continues at a similar rate and the seismicity is minor. As of today, IMO is not getting data from the three GPS stations located within the caldera. Plans are in place to visit the site to re-establish connection and collect data again as soon as weather allows. All GPS stations outside the caldera are sending data regularly. https://icelandicvolcanos.is/?volcano=ASK"},{"id":443,"published_at":"2022-11-09T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"The aviation color code at Grímsvötn is being returned back to green although the long-term trend of activity at Grímsvötn is considered to be above normal background levels. The month-scale seismic activity at Grímsvötn volcano shows an unusual trend characterized by a larger number and more intense earthquakes than before. This trend has been slowly increasing over the past months. Additionally, the deformation has already exceeded the level measured prior to the last eruption in 2011. Currently, geochemical data show no changes from the known background level. This return to green is taken considering the need of the ACC to communicate about short-term changes and not to reflect on long-term trends. Grímsvötn remains a volcano that IMO keeps a close eye on because of the long-term unrest and IMO will inform promptly whenever there will be further changes that might suggest escalation towards an eruptive event. In the past week a total of 10 earthquakes have been detected in Grímsvötn, the largest earthquake was a M2.2 on 8th of November, located about 6km north of Grímsfjall. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 13 earthquakes have been detected in Katla volcano which is similar to last week, when 10 earthquakes were detected. Most are located inside the caldera. The largest earthquake was a M2.6 on the 7th of November. No volcanic tremor has been detected, however the area is being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":"Askja (and Herðubreið): The aviation color code at Askja is being returned back to green. Ground deformation indicates that magma continues to accumulate at depth since August 2021 and a total uplift of 40 cm is currently measured in the inner part of the caldera. This deformation is however not accompanied by elevated seismicity which continues to be within the known background level. This return to green is taken considering the need of the ACC to communicate about short-term changes and not to reflect on long term trends. Askja remains a volcano that IMO keeps a close eye on because of the long-term deformation and IMO will inform promptly whenever there will be further changes that might suggest escalation towards an eruptive event. In the past week a total of 20 earthquakes were detected, the largest earthquake was a M1.5 on 6th of November located on the east edge of Öskjuvatn. The seismic swarm which began on the 22nd of October in Herðubreið continues at a much lower rate than before and is located north and southwest of Herðubreið. A total of 1000 earthquakes have been detected in the past week. The largest earthquake was a M2.8 on 4th of November. Swarms like this are common in this area, and they are most likely due to strike-slip faults due the divergent plate boundary going through the area. There are no evidences of deformation in the area concurrent the ongoing seismic activity. The area is being closely monitored. https://icelandicvolcanos.is/?volcano=ASK"},{"id":444,"published_at":"2022-11-16T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week a total of 10 earthquakes have been detected in Grímsvötn, the largest earthquake was a M2 on 11th of November, located on Grímsfjall. No volcanic tremor has been detected, however the area is being closely monitored. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 10 earthquakes have been detected in Katla volcano which is similar to last week, when 13 earthquakes were detected. Most are located inside the caldera. The largest earthquake was a M2.8 on the 16th of November. No volcanic tremor has been detected, however the area is being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":"Askja (and Herðubreið): In the past week a total of 7 earthquakes were detected, the largest earthquake was a M2.5 on 10th of November located 1.5 km east of Öskjuvatn. The seismic swarm which began on the 22nd of October in Herðubreið continues at a much lower rate than before and is located north and southwest of Herðubreið. A total of 130 earthquakes have been detected in the past week whereas the week before about 1000 earthquakes were detected. The largest earthquake was a M2.4 on 10th of November located northeast of Herðubreið. Swarms like this are common in this area, and they are most likely due to strike-slip faults due the divergent plate boundary going through the area. There is no evidence of deformation in the area concurrent the ongoing seismic activity. The area is being closely monitored. https://icelandicvolcanos.is/?volcano=ASK"},{"id":445,"published_at":"2022-11-23T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 19 earthquakes have been detected in Katla volcano and four of them were above M3. They occurred in connection with two seismic pulses occurred on 19th of November and 22nd of November. The largest earthquake was a M3.9 on the 22nd of November. Most of the seismicity is located northeast inside the caldera and is quite shallow (<2km). This activity is quite unusual for this period of the year, but this might be linked to the very unusual meteorological conditions hitting Iceland in the past week that might trigger unusual response of the geothermal system under Myrdalsjökull glacier. The situation is followed with attention. https://icelandicvolcanoes.is//?volcano=KAT"},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week a total of 5 earthquakes have been detected in Grímsvötn, the largest earthquakes were both a M2 on the 20th and 21st of November, located 2 km south of Grímsfjall and 6 km north of Grímsfjall. The seismicity in Grímsvötn continues to be above known background level, however no other geophysical or geochemical parameters show unusual behaviour. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes were detected in Hekla in the past week. The largest was a M1.8 on the 20th of November. There has been a bit increased activity in Hekla in the past few months, however no other geophysical/geochemical are showing unusual values or trend. https://icelandicvolcanoes.is/?volcano=HEK#"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of magnitude M3.0 has been detected in Öræfajökull this morning. Few hours before, a M2.6 occurred in a similar location. Large earthquakes (> M3) are not very common in Öræfajökull, the last one, before today, was in October 2018. The situation is followed with attention. https://icelandicvolcanoes.is//?volcano=ORA"}],"additional_notes":"Askja (and Herðubreið): In the past week a total of 6 earthquakes were detected in Askja, the largest earthquake was a M1.7 on 21st of November located 1km east of Öskjuvatn. The deformation continues at stable rate. Since today some GPS stations located in Askja caldera are streaming data again to IMO. The seismic swarm which began on the 22nd of October in Herðubreið decreases week by week. This week a total of 85 earthquakes have been detected in the past week whereas the week before about 130 earthquakes were detected. The largest earthquake was a M1.9 on 19th of November located 4 km southwest of Herðubreið. Swarms like this are common in this area, and they are most likely due to strike-slip faults due the divergent plate boundary going through the area. There is no evidence of deformation in the area concurrent the ongoing seismic activity. The area is being closely monitored. https://icelandicvolcanos.is/?volcano=ASK"},{"id":446,"published_at":"2022-11-30T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week a total of 19 earthquakes were detected in Grímsvötn, the largest earthquake was a M2.4 on the 27th of November, located on Grímsfjall. The seismicity in Grímsvötn continues to be above known background level, however no other geophysical or geochemical parameters show unusual behavior. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":null,"status_text":"One earthquake was measured at Hekla volcano in the past week. It was a M1.4 on the 30th of November. There has been a bit increased activity in Hekla in the past few months, however no other geophysical/geochemical are showing unusual values or trend. https://icelandicvolcanoes.is/?volcano=HEK#"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 30 earthquakes were detected in Katla volcano, three of them were above M3. The largest earthquake was a M3.4 on the 27th of November. The earthquakes are located within or around the volcano’s caldera. The earthquakes are quite shallow (<2km). This activity is quite unusual for this period of the year but is likely connected to unusual meteorological conditions hitting Iceland in the past weeks with warmer weather that might trigger unusual response of the geothermal system under Mýrdalsjökull glacier, conductivity has been slightly higher the past few days due to this. The situation is followed with attention. https://icelandicvolcanoes.is//?volcano=KAT"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"A total of 12 earthquakes were detected in Öræfajökull in the past week. The largest earthquake was a M2.8 on the 23rd of November. Most of the earthquakes are located in the northwest rim of the caldera. Geophysical or geochemical parameters show no unusual behavior. This activity is quite unusual for Öræfajökull but is it could be connected to unusual meteorological conditions hitting Iceland in the past weeks with warmer weather. However, the IMO keeps a close eye on any changes. https://icelandicvolcanoes.is//?volcano=ORA"}],"additional_notes":"Askja (and Herðubreið): In the past week a total of 13 earthquakes were detected in Askja, the largest earthquake was a M1.8 on 28th of November located northeast in Öskjuvatn. The deformation continues at stable rate and currently shows a total uplift of 41 cm. The seismic swarm which began on the 22nd of October in Herðubreið continues at a similar rate as past weeks. This week a total of 135 earthquakes have been detected whereas the week before about 85 earthquakes were detected. The largest earthquake this week was a M2.4 on 25th of November located 4 km southwest of Mt. Herðubreið. Seismic swarms like this one are common in this area, and they are most likely due to strike-slip faults due the divergent plate boundary going through the area. There is no evidence of deformation in the area concurrent the ongoing seismic activity. The area is being closely monitored. https://icelandicvolcanos.is/?volcano=ASK"},{"id":447,"published_at":"2022-12-07T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Four earthquakes detected, largest M2.7 with no further escalated activity."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week a total of 4 earthquakes were detected in Grímsvötn, whereas last week about 14 earthquakes were detected. The largest earthquake was a M1.8 on the 30th of November, located 0.5 km south of Grímsfjall. The seismicity in Grímsvötn continues to be above known background level, however no other geophysical or geochemical parameters show unusual behavior. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 3 earthquakes were detected in Katla volcano, largest was a M2.1 on the 4th of December located west in the Katla caldera. The seismicity has decreased in Katla as last week about 35 earthquakes were detected. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":null,"status_text":"A total of 6 earthquakes were detected in Öræfajökull in the past week whereas the week before about 18 earthquakes were detected. The largest earthquake was a M1 on the 5th of December. Most of the earthquakes are located in the northwest rim of the caldera. Geophysical or geochemical parameters show no unusual behavior. This activity is quite unusual for Öræfajökull. However, the seismicity is decreasing from last week and as with Katla it is possibly related to colder weather conditions. However, the IMO keeps a close eye on any changes. https://icelandicvolcanoes.is//?volcano=ORA"}],"additional_notes":"Askja (and Herðubreið): In the past week a total of 17 earthquakes were detected in Askja, the largest earthquake was a M2.4 on the 3rd of December located northeast in Öskjuvatn. The deformation continues at stable rate and currently shows a total uplift of 41 cm. The seismic swarm which began on the 22nd of October in Herðubreið has slightly increased. This week a total of 445 earthquakes have been detected whereas the week before about 160 earthquakes were detected. The largest earthquake this week was a M2.7 on 1st of December located 4 km southwest of Mt. Herðubreið. Seismic swarms like this one are common in this area, and they are most likely due to strike-slip faults due the divergent plate boundary going through the area. There is no evidence of deformation in the area concurrent the ongoing seismic activity. The area is being closely monitored. https://icelandicvolcanos.is/?volcano=ASK"},{"id":448,"published_at":"2022-12-14T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Four earthquakes detected, largest M2.6 with no further escalated activity."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week a total of five earthquakes were detected in Grímsvötn, whereas last week about four earthquakes were detected. The largest earthquake was a M1.5 on the 14th of December, located on Grímsfjall. The seismicity in Grímsvötn continues to be above known background level, however no other geophysical or geochemical parameters show unusual behavior. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 22 earthquakes were detected in Katla volcano, largest was a M2.8 on the 14th of December located west in the Katla caldera. The seismicity has increased in Katla compared to the week before. There is no evidence of changes in other geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":"Askja (and Herðubreið): In the past week a total of two earthquakes were detected in Askja, the larger earthquake was a M1.3 on the 9th of December located northeast of Öskjuvatn. The deformation continues at stable rate and currently shows a total uplift of 42 cm. Several seismic stations are currently offline due to low battery, they are expected to come back online in the next coming days as the wind is picking up in the area. The seismic swarm which began on the 22nd of October in Herðubreið has decreased from last week. This week a total of 122 earthquakes have been detected whereas the week before about 455 earthquakes were detected. The largest earthquake this week was a M2.2 on 11th of December located west of Herðubreiðartögl. Seismic swarms like this one are common in this area, and they are most likely due to strike-slip faults due to the divergent plate boundary going through the area. There is no evidence of deformation in the area concurrent the ongoing seismic activity. The area is being closely monitored. https://icelandicvolcanos.is/?volcano=ASK"},{"id":449,"published_at":"2022-12-21T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week three earthquakes were detected in Grímsvötn, which is similar to the two weeks before. The largest earthquake was a M2.1.The seismicity in Grímsvötn continues to be above known background level, however no other geophysical or geochemical parameters show unusual behavior. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the last week 23 earthquakes were detected in Katla volcano, which is similar to number to the week before. Two earthquakes last week were measured above M3.0, the larger one was M3.8 on 18th of December and the other one M3.1 on 16th of December. There is no evidence of changes in other geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"At 10:13 on 21st of December a M3.4 earthquake was detected near Krýsuvík. IMO received few felt reports from Reykjavík and surrounding cities. Last week 26 earthquakes were detected in the Krýsuvík area. https://icelandicvolcanos.is/?volcano=KRY#"}],"additional_notes":"Askja (and Herðubreið): In the past week five earthquakes were detected in Askja, all below M1.5. The deformation continues at stable rate. The nearest seismic stations are back online. The seismic swarm which began on the 22nd of October close to Herðubreið has now stopped and activity is back to normal background levels. Last week 17 earthquakes were detected there compared to 122 the week before. https://icelandicvolcanos.is/?volcano=ASK"},{"id":450,"published_at":"2022-12-28T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week five earthquakes were detected in Grímsvötn, which is similar to the two weeks before. The largest earthquake was a M3.2 on the 27th of December. The seismicity in Grímsvötn continues to be above known background level, however no other geophysical or geochemical parameters show unusual behavior. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 15 earthquakes were detected in Katla volcano, which is similar to the week before. Two earthquakes were measured above M2.0, the larger one was M2.9 on 25th of December and the other one was a M2.8 on 21st of December. There is no evidence of changes in geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"Two earthquakes over M3 were detected about 2 km southwest of Reykjanesskagi, the larger was a M3.2."}],"additional_notes":"Askja (and Herðubreið): In the past week 25 earthquakes were detected in Askja, the largest earthquake was a M2.3 on the 21st of December located northeast in lake Askja. The deformation continues at a stable rate. A total of 64 earthquakes were detcted around Herðubreið, the largest earthquake was a M1.7 located about 3 km east of Herðubreið. https://icelandicvolcanos.is/?volcano=ASK"},{"id":451,"published_at":"2023-01-04T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Ten earthquakes were detected in the past week, the largest earthquake was a M2.9. There was no further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week three earthquakes were detected in Grímsvötn. The largest earthquake was a M1.4 on the 29th of December. The seismicity in Grímsvötn continues to be above known background level, however no other geophysical or geochemical parameters show unusual behavior. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 13 earthquakes were detected in Katla volcano, which is similar to the week before. Two earthquakes were measured above M2.0, the larger one was M2.3 on the 2nd of January and the other one was a M2.1 on 28th of December. There is no evidence of changes in geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":"Askja (and Herðubreið): In the past week one earthquake was detected in Askja, it was a M0.8 located in the eastern caldera rim. The deformation continues at a stable rate. A total of 26 earthquakes were detected around Herðubreið, the largest earthquake was a M1.5 located about 3 km north of Herðubreið. https://icelandicvolcanos.is/?volcano=ASK"},{"id":452,"published_at":"2023-01-11T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor seismicity, the deformation continues at stable rate."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Fourteen earthquakes were detected in the past week, the largest earthquake was a M3.3. There was no further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"The cumulative number of earthquakes at Grímsvötn has not increased further in the past month. However, the frequency of large earthquakes (>M2) is overall increasing with time. For this reason, the seismicity in Grímsvötn is considered to be above known background level. As of today, no other geophysical or geochemical parameters show unusual values. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week more than 30 earthquakes were detected in Katla volcano, double the number the week before. Seven earthquakes were measured above M2.0, the largest one was M2.4 on the 9th of January. There is no evidence of changes in geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":453,"published_at":"2023-01-18T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor seismicity, the deformation continues at stable rate."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquakes were detected in the past week, the largest earthquake was a M2.9. There was no further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No earthquakes were detected in Grímsvötn in the past week. The cumulative number of earthquakes at Grímsvötn has not increased further in the past month. However, the frequency of large earthquakes (>M2) is overall increasing with time. For this reason, the seismicity in Grímsvötn is considered to be above known background level. As of today, no other geophysical or geochemical parameters show unusual values. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week more than 32 earthquakes were detected in Katla volcano, which is like the week before. Seven earthquakes were measured above M2.0, the largest one was M2.5 on the 18th of January. There is no evidence of changes in geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":454,"published_at":"2023-01-25T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor seismicity, the uplift continues at stable rate and has now reached a total of 50 cm since August 2021."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"11 earthquakes were detected in the past week, the largest earthquake was a M2.1. There was no further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Four earthquakes were detected in Grímsvötn in the past week. The cumulative number of earthquakes at Grímsvötn has not increased further in the past month. However, the frequency of large earthquakes (>M2) is overall increasing with time. For this reason, the seismicity in Grímsvötn is considered to be above known background level. As of today, no other geophysical or geochemical parameters show unusual values. https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 27 earthquakes were detected in Katla volcano, which is similar to the week before. Most of them were located inside the caldera. Six earthquakes were measured above M2.0, the largest one was M2.6 on the 24th of January. The general trend observed so far shows that the monthly seismic activity in January is slightly above normal background level. There is no evidence of changes in geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":455,"published_at":"2023-02-01T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":456,"published_at":"2023-02-08T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor seismicity, the uplift continues at stable rate and has now reached a total of 50 cm since August 2021. https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An M3.2 was detected on Tuesday 07th of February, several aftershocks were detected."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week around eight earthquakes were detected in Katla volcano, the largest one M2.7. That is less activity compared to the week before. The monthly seismic activity in January was slightly above normal background level. There is no evidence of changes in geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":457,"published_at":"2023-02-15T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The crater lake in Askja is usually ice covered at this time of year, recently the ice has partly broke and melted rather suddenly. A monhtly monitoring meeting was held yesterday and the cause of this event was discussed. There are two hypothesis on what is causing this event, firstly a pulse of increase geothermal activity, secondly warm weather and favorable wind that could cause the ice to break up quickly, or a mix of these two hypothesis. Similar event is known to have happened before, last in 2012. Minor seismicity, the uplift continues at stable rate and has now reached a total of 50 cm since August 2021. The area remains closely monitored. https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week twelve earthquakes were detected in Katla volcano, the largest one M2.6. That is slightly higher activity compared to the week before. There is no evidence of changes in geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 10th of February at 19:45 local time there was a small seismic swarm detected 5km SW of Reykjanestá on Reykjanes ridge. The largest earthquake was a M3.6, seven earthquakes measured above M3.0. There was no further escalated activity. https://icelandicvolcanoes.is//?volcano=REY"}],"additional_notes":""},{"id":458,"published_at":"2023-02-22T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"On 16 February, a group of scientists from the Icelandic Meteorological Office and the University of Iceland joined a flight with the Icelandic Coast Guard aircraft TF-SIF to better observe the area of Askja volcano in the hopes of clarifying the potential explanation for the unusually early melting of the ice on the caldera lake. The observation flight did not confirm the process causing it, however no signs of increased geothermal activity were seen around the lake, nor were there other visible changes which could help clarify why the melting is happening so early in the year. Other monitored geophysical parameters do not show any unusual changes or escalation. A total of 27 earthquakes were detected in the past week. The largest was a M1.6 on the 19th of February. The uplift continues at stable rate and has now reached a total of 50 cm since August 2021. The area remains closely monitored. https://icelandicvolcanoes.is/?volcano=ASK In the past week, a total of 60 earthquakes were detected in and around Herðubreið, ~25 km NE of Askja. The largest was a M3.5 on the 17th of February, it was located about 1 km north of Herðubreið. Most likely this seismic activity has tectonic origin and seismic swarms in this area have been observed often in the past years."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"On the 21st of February a M4.9 earthquake was detected in Bárðarbunga volcano, and it was followed by several aftershocks. A total of 31 earthquakes were detected in the past week. Earthquakes of similar size have been common in Bárðarbunga in the recent years since the end of the eruption in Holuhraun in 2015. The last comparable event occurred in July 2022 and it was a M4.9. Other monitored geophysical parameters do not show any unusual changes or escalation. https://icelandicvolcanoes.is/?volcano=BAR"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week fourteen earthquakes were detected in Katla volcano, the largest one had a magnitude of M2.8. That is slightly higher activity compared to the week before. There is no evidence of changes in other geophysical or geochemical data. The area is still being closely monitored. https://icelandicvolcanoes.is//?volcano=KAT"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"The Reykjanes ridge has been quite active in the past weeks with two areas characterized by unusually high seismicity 5 km and 30 km SW of Reykjanestá. The largest earthquake was a M3.1 at 15:30 on the 21st of February at 30 km distance from Reykjanestá. A total of 100 earthquakes have been automatically detected last week. Swarms like these are common in the area and occurred last on the 10th of February. https://icelandicvolcanoes.is//?volcano=REY"}],"additional_notes":""},{"id":459,"published_at":"2023-03-01T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":460,"published_at":"2023-03-08T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":461,"published_at":"2023-03-15T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":462,"published_at":"2023-03-22T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The caldera lake remains ice covered and in the past week about 18 earthquakes were detected, where the largest was a M2.5 located about 5 km NW of lake Askja. New datapoint was obtained on 19th of March from station OLAC in the center of the caldera after not receiving any data for a couple of weeks. The maximum uplift measured at station OLAC has now reached around 52 cm, since August 2021. More information on Askja volcano: https://icelandicvolcanoes.is/?volcano=ASK In the past week, a total of 19 earthquakes were detected in and around Herðubreið, ~25 km NE of Askja. Which is less than in the previous week where 46 earthquakes were detected. The largest was a M1.8 on the 17th of March, located in the northern flanks of Herðubreið. Most likely this seismic activity has tectonic origin, seismic swarms in this area have been observed often in the past years, however it cannot be excluded that this activity is in response to the stress change induced by the magmatic intrusion ongoing in Askja."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 on the 19th of March, no further escalated activity"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week about 23 earthquakes were detected in Katla volcano which is less than the week before where 48 earthquakes were detected. The activity in March is already above background level as it did in January. The largest one was M2.5 on the 20th of March. The earthquakes were all located within the caldera and were spread around. No geothermal gas or elevated conductivity have been detected in glacial rivers around Katla volcano in the past week. The area is still being closely monitored. More information on Katla volcano: https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":463,"published_at":"2023-03-29T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"More information on Katla volcano: HYPERLINK \"https://icelandicvolcanoes.is/?volcano=KAT%20\" https://icelandicvolcanoes.is//?volcano=KAT"},{"id":464,"published_at":"2023-04-05T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":465,"published_at":"2023-04-12T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":""},{"id":466,"published_at":"2023-04-19T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 19 earthquakes have been detected, where the largest is a M1.7 located in the east rim of the caldera. Deformation in the centre of the caldera continues in a stable way as it has done since August 2021. More information on Askja volcano: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week about 5 earthquakes were detected in Katla volcano which is less than last week where 18 earthquakes were detected. The largest earthquake was a M2.1. Most of the earthquakes were located in the NW-part of the caldera. H2S was measured at Láguhvolar (SE edge of Kötlujökull) in the past week, however the conductivity in Múlakvísl river continues to be in normal background level. This happened in the beginning of March as well. There has been no further escalation. The area is still being closely monitored. More information on Katla volcano: https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":467,"published_at":"2023-04-26T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 40 earthquakes have been detected, which is slightly more than last week, where the largest is a M2 located in the east rim of the caldera. Deformation in the centre of the caldera continues in a stable way as it has done since August 2021 More information on Askja volcano: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 on the 23rd of April, no further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 and 2.8 were detected on 23rd of April, no further escalation."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week about 15 earthquakes were detected in Katla volcano which is slightly more than last week where 5 earthquakes were detected, the largest earthquake was a M2.4. Most of the earthquakes were located in the northern part of the caldera. The conductivity in Múlakvísl river, located SE of Mýrdalsjökull Ice-Cap, increased in the past week which is most likely due to H2S that was detected near the SE edge of Mýrdalsjökull in the past week. This happened in the beginning of March as well. There has been no further escalation. The area is still being closely monitored. More information on Katla volcano: https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":468,"published_at":"2023-05-03T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 40 earthquakes have been detected which is like last week. The largest earthquake detected was a M2.1, located in the east rim of the caldera. Deformation in the centre of the caldera continues in a stable way as it has done since August 2021 More information on Askja volcano: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week a total of 32 earthquakes were detected which is an increase since the week before. The activity was above background level in April. The largest earthquake detected was a M2.1 located 3.5 km NE of Grímsfjall. There has been no further escalation. The area is being closely monitored. More information on Grímsvötn volcano: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 28 earthquakes were detected in Katla volcano which is slightly more than last week when 15 earthquakes were detected, the largest earthquake was a M1.9. The earthquakes were spread around the caldera. The area is still being closely monitored. More information on Katla volcano: https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":469,"published_at":"2023-05-10T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 26 earthquakes have been detected. The largest earthquake detected was a M1.6, located in the east rim of the caldera. Deformation in the centre of the caldera continues in a stable way as it has done since August 2021. Newest satellite image shows the ice on lake Askja is slowly melting, as is to be expected around this time of the year. In the summer new equipment will be installed, that includes 2 new cameras inside the caldera, 2 ground temperature probes and 1 seismometer. More information on Askja volcano: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week a total of 17 earthquakes were detected which is a decrease since the week before. The largest earthquake detected was a M2.6 located 1.5 km north of Grímsfjall. Overall, the level of seismicity at Grímsvötn continues to be above the known background level. No other geophysical and geochemical parameters show unusual values. More information on Grímsvötn volcano: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 53 earthquakes were detected in Katla volcano which is more than last week when 28 earthquakes were detected. An intense seismic swarm occurred on the 4th of May when 3 earthquakes were detected over M4, the largest a M4.6. Most of the earthquakes were located in the northern part of the caldera. The aviation level was raised to yellow due to intense seismicity, however no changes in the geochemical (gas), geophysical data (deformation) or hydrological data were detected in connection with this seismic activity. The seismicity was back to normal the day after, therefore the aviation color code was moved back to green. Since then, there has been no further escalation. More information on Katla volcano: https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":470,"published_at":"2023-05-17T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 20 earthquakes have been detected. The largest earthquake detected was a M2, located in the SW rim of the caldera. Deformation in the centre of the caldera continues in a stable way as it has done since August 2021. More information on Askja volcano: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week a total of 7 earthquakes were detected which is a decrease since the week before. The largest earthquake detected was a M1.2 located on Grímsfjall. Overall, the level of seismicity at Grímsvötn continues to be above the known background level. No other geophysical and geochemical parameters show unusual values. More information on Grímsvötn volcano: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 11 earthquakes were detected in Katla volcano which is much less than last week when 53 earthquakes were detected. The largest earthquake was a M1.5 located NE in the caldera. More information on Katla volcano: https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":471,"published_at":"2023-05-24T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 20 earthquakes have been detected. The largest earthquake detected was a M2, located in the SW rim of the caldera. The GPS station OLAC is now back online and shows a total uplift of 60 cm since August 2021, the deformation in the centre of the caldera continues in a stable way. In June a team of technicians will be going to Askja to set up additional monitoring equipment, which includes cameras, ground temperature probes and possibly a seismometer. More information on Askja volcano: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week a total of 3 earthquakes were detected which is a decrease since the week before. The largest earthquake detected was a M1.8 located about 5 km north of Grímsfjall. Overall, the level of seismicity at Grímsvötn continues to be above the known background level. No other geophysical and geochemical parameters show unusual values. More information on Grímsvötn volcano: https://icelandicvolcanoes.is/?volcano=GRV Grímsey: A small seismic swarm is on going east of Grímsey, the largest earthquake detected was a M3.8. A total of 85 earthquakes have been detected. This swarm is most likely of tectonic origin."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 3 earthquakes were detected in Katla volcano which is less than the week before when 11 earthquakes were detected. The largest earthquake was a M2.3 located in the center of the caldera. More information on Katla volcano: https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":472,"published_at":"2023-05-31T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 9 earthquakes have been detected. The largest earthquake detected was a M1.7, located about 4 km north of lake Askja. The deformation in the centre of the caldera continues in a stable way as it has done since August 2021. More information on Askja volcano: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week a total of 4 earthquakes were detected which is similar to the week before. The largest earthquake detected was a M1 located about 4.5 km south of Grímsfjall. Overall, the level of seismicity at Grímsvötn continues to be above the known background level. No other geophysical and geochemical parameters show unusual values. More information on Grímsvötn volcano: https://icelandicvolcanoes.is/?volcano=GRV Grímsey: The seismic swarm which began on the 20th of May is ongoing, a total of 280 earthquakes have been detected. The largest earthquake was this week was a M3 located about 7 km NE of Grímsey. This swarm is most likely of tectonic origin."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week 10 earthquakes were detected in Katla volcano which is more than the week before when 3 earthquakes were detected. The largest earthquake was a M2.8 located in the north part of the caldera. More information on Katla volcano: https://icelandicvolcanoes.is//?volcano=KAT"}],"additional_notes":""},{"id":473,"published_at":"2023-06-07T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 earthquake was detected on the 5th of June. There was no further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."}],"additional_notes":""},{"id":474,"published_at":"2023-06-14T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 earthquake was detected on the 9th of June. There was no further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"All monitoring instruments on Grímsfjall (Seismic, GPS, Tilt, Gas and Webcam) stopped sending data on Sunday evening (11 June). Power supplies on Grímsfjall are now only from solar panels due to a failure in a power generator. Data might start streaming again from Grímsfjall with improving weather but in the meantime a solution to this power shortage is worked on. Other seismic stations around Grímsvötn are sending data normally so seismic activity in Grímsvötn is still monitored. In the past week a total of 5 earthquakes were detected which is similar to the week before. The largest earthquake detected was a M1.3 located about 4.6 km south of Grímsfjall. More information on Grímsvötn volcano: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"VES","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Fagradalsfjall:\nRecent InSAR analysis (spanning the end of the August 2022 eruption to the end of May 2023) reveals a number of deformation signals on the Reykjanes peninsula. There are indications of a deep inflation source beneath Fagradalsfjall. This could be the result of deep magma inflow around the base of the crust. A small subsidence signal is also observed at Fagradalsfjall and deformation modelling indicates that the source is shallow. Subsidence signals have also been observed at Reykjanestá and Svartsengi, west of Fagradalsfjall. Additional modelling will be undertaken to better determine the processes behind each of these signals. More information on Fagradalsfjall: https://icelandicvolcanoes.is/?volcano=FAG Vestmanneyjar: Last week a M3.1 earthquake was detected about 20 km southwest of Vestmannaeyjar. Last time an earthquake over M3 was detected in the area was in 2019. There was no further escalation. More information on Vestmannaeyjar: https://icelandicvolcanoes.is/?volcano=VES"},{"id":475,"published_at":"2023-06-21T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 earthquake was detected on the 15th of June. There was no further escalation."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"No further analysis has been made on deformation in the area since last week, but seismic activity is closely monitored. Last week around 230 earthquakes were detected in the area and most of the activity was just NE of Fagradalsfjall. The largest earthquake was M2.6, but majority of the earthquakes were below M1. More information on Fagradalsfjall: https://icelandicvolcanoes.is/?volcano=FAG"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Monitoring instruments on Grímsfjall (Seismic, GPS, Tilt, Gas and Webcam) are still offline due to a failure in a power generator. A team of technicians will go to Grímsfjall this week and bring the monitoring stations back online. Other seismic stations around Grímsvötn are sending data normally so seismic activity in Grímsvötn is still monitored. In the past week a total of 3 earthquakes were detected which is similar to the week before. The largest earthquake detected was a M1.3 located about 1.5 km west of Grímsfjall. More information on Grímsvötn volcano: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Yesterday on the 20th of June a small jökulhlaup (glacier outburst flood) started in Emstruá located about 7 km northeast of Mýrdalsjökull. Jökulhlaup like this occur almost early and oppose no major danger to the area, but potentially hazardous high concentrations of gas are possible near the source of the river and in depressions in the landscape close to the river. There has been no further escalation on this event. More information on Katla: https://icelandicvolcanoes.is/?volcano=KAT"}],"additional_notes":""},{"id":476,"published_at":"2023-06-28T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"Deformation is ongoing around Fagradalsfjall, but no significant changes have occurred since last week. Last week just over 50 earthquakes were detected around Fagradalsfjall, all below M1.5, however in the week before around 230 earthquakes were detected in the area. Most of them were located NE of Fagradalsfjall, like the week before. More information on Fagradalsfjall"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Power supplies to monitoring instruments at Grímsfjall were repaired last week. Seismometer, tilt meter and webcam are streaming data again. In the past week, two earthquakes were detected in Grímsvötn. More information on Grímsvötn"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismic activity in Katla this month is higher than in previous months. Over 150 earthquakes (above M0.8) have been detected in June. Similar rate of earthquake activity occurred last in July 2017. Three earthquakes above M3 were detected last week in Katla, M3.8 and M3.3 on 24 June and M3.6 on 27 June. Heightened earthquake activity during summertime in Katla caldera has happened regularly before even though it has not been very prominent in the most recent years. A small jökulhlaup (glacier outburst flood) that started last week in Emstruá NE of Mýrdalsjökull seems to be declining or over. More information on Katla"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"This morning at 9:21 a M3.2 earthquake occurred in Kleifarvatn. Number of smaller earthquakes have followed. More information on Krýsuvík"}],"additional_notes":""},{"id":477,"published_at":"2023-07-05T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.9 and M3.3 earthquakes were detected on the 4th of July. There was no further escalation."},{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":null,"status_text":"A short-lived seismic swarm occurred between 1st of July – 3rd of July in Vífilsfell which is located about 15 km northeast of Brennisteinsfjöll and belongs to the same system. A total of 680 earthquakes were detected with the largest earthquake of M2 on 1st of July. Swarms like this occur regularly in the area and happen last in 2021, this is however the largest swarm yet in regards of total amount of earthquakes, past activities have had fewer but larger earthquakes. The seismicity seems to be of tectonic origin, no deformation has been detected to date in the area. There has been no further escalation. More information on Brennisteinsfjöll"},{"volcano_code":"FAG","vona_color_code":"ORANGE","vals_level":null,"status_text":"Earthquake activity commenced around 14:00 UTC yesterday (4th July) beneath Fagradalsfjall on the Reykjanes Peninsula, followed by an intense seismic swarm that is continuing. Over 1600 earthquakes have occurred since the onset of this activity. The seismicity started beneath the known magma upflow region beneath Fagradalsfjall (in the vicinity of the July 2022 dike intrusion) with earthquake depths shallowing in the first few hours. Seismicity has now reached depths of ~ 2-3 km. At the time of notification, five earthquakes of magnitude larger than 4 have been measured in the area. No eruption tremor has been observed. The current activity is considered to be heightened unrest with increased likelihood of eruption within the coming hours to days, therefore the aviation color code is changed to orange. Two of the GPS stations closest to the dike intrusion are presently offline and the DOAS instrument is currently not installed. A team of technicians are going to the field today to get the GPS back online. A camera will also be installed in the area. More information on Fagradalsfjall"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismic activity in Katla this month is higher than in previous months. A total of 175 earthquakes were detected in the past week. A total of 11 earthquakes were detected over M3 of which one was a M4.4 on the 30th of June. Similar rate of earthquake activity occurred last in July 2017. Heightened earthquake activity during summertime in Katla caldera has happened regularly before even though it has not been very prominent in the most recent years. The conductivity in Múlakvísl heighten in the past week and H2O and C02 was detected in Láguhvolar, indicative of a small geothermal leak. Seismicity and gas have decreased significantly in the past days, however the conductivity is still being detected. The area continues to be closely monitored. More information on Katla"},{"volcano_code":"THO","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 earthquake was detected on 29th of June. There was no further escalation."}],"additional_notes":""},{"id":478,"published_at":"2023-07-12T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"FAG","vona_color_code":"ORANGE","vals_level":null,"status_text":"On 10 July, a volcanic eruption began at 16:40 UTC NE of Litli-Hrútur, which is located in the most northern part of the magma intrusion which has been propagating since last week. A fissure, approximately 1 km long, opened which has now concentrated to a single vent. Initial estimates showed the magma influx to be much higher than in the previous eruptions on the Reykjanes Peninsula in 2021 and 2022. The intensity has however slowey reduced. The magma intrusion seems to be propagating further to the north, so new vents could open between Litli-Hrútur and Keilir. At the onset of the eruption, the SO2 gas emission was 63-133 kg/s. As of yesterday, 11 July, the rate was 66-80 kg/s of SO2, which is similar to the last eruption. Grass and moss fires from the lava are occurring around the area. The seismic activity has slowed down since the onset of the eruption. A total of 11000 earthquakes were detected in the past week. The largest was a M5.2 on the 9th of July which is the largest earthquake detected in this event. A team of IMO technicians plan to go into the field in the week to install DOAS monitoring equipment. More information on Fagradalsfjall"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"The Seismic activity in Katla has slowed down significantly, less than 5 earthquakes were detected last week, the largest a M1.7 on the 8th of July. The conductivity and gas emissions have decreased significantly in the past days. The area continues to be closely monitored. More information on Katla"}],"additional_notes":"Brennisteinsfjöll\nLast week, about 500 earthquakes were detected, of which four over M4. The largest was a M4.5 event on the 7th of July. The aviation color code was moved to yellow due to the intense seismic swarm. Swarms like this are common in the area however they have never been as intense. The GPS data showed no changes, however the closest station is located at 10 km distance which is at too greater distance to rule-out any magma movement under the surface. The activity ceased shortly after 8 of July and therefore the aviation color code was moved back to green. More information on Eldey"},{"id":479,"published_at":"2023-07-19T11:00:00Z","entries":[{"volcano_code":"FAG","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption just NE of Litli-Hrútur is ongoing with no major changes. The activity is now focussed on one crater with a lava flow rate of around 10-15 m3/s (comparable to previous eruptions in Fagradalsfjall). The area of the new lava was measured to be around 0.83 km2 on July 17th. The SO2 flux has been similar in recent days, with values ranging between 30-130 kg/s according to DOAS measurements. The height of the volcanic plume ranges from between 1-2 km above sea level, as estimated by cameras. Grass and moss fires have been prevailing in the area but firefighters have managed to put most of them out. The earthquake activity has slowed down since the onset of the eruption. The earthquake activity has mainly been by Mt. Keilir, which is by the northern end of the dike, and to the east of Keilir. More information on Fagradalsfjall: https://icelandicvolcanoes.is/?volcano=FAG"}],"additional_notes":""},{"id":480,"published_at":"2023-07-26T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Deformation in the area continues steadily since August 2021. The seismicity does not show significant changes."},{"volcano_code":"FAG","vona_color_code":"ORANGE","vals_level":null,"status_text":"The minor effusive eruption which commenced on 10 July continues with no major changes. The activity is now concentrated on the main crater located at 63.919N, -22.204E (63° 55.132'N, 22° 12.234'W) and it has now reached a size of 90 m x 40 m. The latest measurements of the lava field were performed by colleagues at the University of Iceland, the Icelandic Institute of Natural History and the National Land Survey of Iceland on 23 July. The average lava effusion rate is assessed to be of 8.0 m3/s for the period 18-23 July. After two weeks of activity, the lava field covers now an area of about 1.2 km2 and the total erupted volume is about 12.4 million cubic meters. No new SO2 flux are available since 18 July when it was assessed to be 40 kg/s. The height of the volcanic plume ranges between 1-2 km above sea level, as estimated by cameras. Grass and moss fires are occasionally still a local hazard. The earthquake activity has slowed down since the onset of the eruption. The earthquake activity has mainly been by Mt. Keilir, which is by the northern end of the dike, and to the east of Keilir. The eruption does not present a hazard to the aviation as no ash is produced by the current activity. The latest news has been published on IMO’s web-site: https://en.vedur.is/about-imo/news/earthquake-activity-in-fagradalsfjall-area More information on Fagradalsfjall volcanic system are accessible at: https://icelandicvolcanoes.is/?volcano=FAG"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of magnitude M3.5 occurred on 23 July in the SE part of the caldera. Few small earthquakes followed."}],"additional_notes":""},{"id":481,"published_at":"2023-08-02T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Deformation in the area continues steadily since August 2021. The seismicity does not show significant changes."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.6 on the 28th of July. No further escalated activity."},{"volcano_code":"FAG","vona_color_code":"ORANGE","vals_level":null,"status_text":"The latest measurements of the lava field were performed by colleagues at the University of Iceland, the Icelandic Institute of Natural History, and the National Land Survey of Iceland on 31 July. They show the average lava effusion rate to be 5 m3/s (between 23rd – 31st of July) indicating a decreasing trend in the eruption activity. After three weeks of activity, the lava field covers an area of about 1.5 km2 and the total erupted volume is about 15.9 million cubic meters. No new SO2 flux are available since 25 July when it was assessed to be 40-70 kg/s. A DOAS traverse will however be performed later today. The calibrated cameras estimate the height of the volcanic plume to be mostly between 1-2 km above sea level, raising occasionally up to 2.5 km. Grass and moss fires are occasionally still a local hazard. The earthquake activity has slowed down since the onset of the eruption. The earthquake activity has mainly been by Mt. Keilir, which is by the northern end of the dike, and to the east of Keilir. The GPS data indicate sign of deflation at depth which probably coincides with the deep source feeding the eruption. The overall dataset confirm that the eruption is slowly decreasing and it might possibly come to an end in the coming days/weeks. The eruption does not present a hazard to the aviation as no ash is produced by the current activity. The latest news has been published on IMO’s web-site: https://en.vedur.is/about-imo/news/earthquake-activity-in-fagradalsfjall-area More information on Fagradalsfjall volcanic system are accessible at: https://icelandicvolcanoes.is/?volcano=FAG"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week about 70 earthquakes have been detected in Katla. The largest was a M2.5 on the 1st of August. There has been no further escalated activity."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"In the past week about 70 earthquakes have been detected in the Torfajökull area. The largest earthquake was a M3.2 on the 30th of June. The earthquake was felt in Landmannalaugar, a popular touristic zone. GPS and InSAR show no changes, seismic swarms like that have occurred in 2021 and 2022. https://icelandicvolcanoes.is/?volcano=TOR"}],"additional_notes":""},{"id":482,"published_at":"2023-08-09T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. Uplift continues steadily. Next week, scientists from IMO will visit Askja to monitor gas and deformation as part of the yearly field campaign."},{"volcano_code":"FAG","vona_color_code":"YELLOW","vals_level":null,"status_text":"The activity in the Reykjanes peninsula has entered a new phase. At the end of last week, it was possible to see the crater, feeding the eruption in Litli-Hrútur, shrinking, and reducing its size. At the same time, starting on midnight on August 4, volcanic tremor started declining in a stable manner as measured by many stations close to the eruption site. At midday August 5, the tremor detected at the station located at Hraunsel-Vatnsfell (HRV), right at the eruption site, decreased further reaching pre-eruptive levels. No activity has been observed at the crater since then. The last thermal anomaly detected by satellite (MODIS) was on August 6. Seismic activity in the area continues, but it is now much less intense compared to the beginning of the eruption. GPS data and InSAR images do not show indications of deformation ongoing in the area. The latest news has been published on IMO’s web-site: https://en.vedur.is/about-imo/news/earthquake-activity-in-fagradalsfjall-area More information on Fagradalsfjall volcanic system is accessible at: https://icelandicvolcanoes.is/?volcano=FAG"}],"additional_notes":""},{"id":483,"published_at":"2023-08-16T11:00:00Z","entries":[{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"Ten days have passed since last activity was seen in the crater close to Litli-Hrútur and since volcanic tremor reached its background level. No deformation is detected in the area and the seismic activity has decreased significantly. It seems that yet another chapter is closed in volcanic activity on the Reykjanes peninsula. The aviation color code has been changed to green. More information on Fagradalsfjall volcanic system is accessible at: https://icelandicvolcanoes.is/?volcano=FAG"},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. Uplift continues steadily. Scientist from IMO are now in Askja to monitor and sample gases, and to measure deformation. New data will be available on Thursday."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Recent deformation data show uplift in the middle of the Torfajökull caldera. The uplift began in June and a few centimeters have been measured by both InSAR and GPS data. The most likely scenario is that magma is accumulating at depth. In the coming weeks, effort will be made to further analyze the data and calculate models to constrain the depth and volume of intruded magma. No significant changes in seismicity have occurred since the beginning of the uplift. The last eruption in Torfajökull was in 1477. The volcanic system includes a central volcano and a fissure swarm (direction NE-SW) and is about 40 km long and 30 km wide. At the central volcano is a caldera which is 18x12 km, there is the largest geothermal area of Iceland which is about 150 km2. More information on Torfajökull volcanic system is accessible at: https://icelandicvolcanoes.is/?volcano=TOR"}],"additional_notes":""},{"id":484,"published_at":"2023-08-23T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The inflation at Askja continues steadily and has reached about 70 cm in the middle of the caldera. Scientists from IMO measured gases and collected gas and water samples in Askja and Viti last week. Very preliminary results indicate no changes compared to previous years. From visual inspections and pH measurements there are no evident changes in geothermal activity around Viti. Further analyses of gas/water samples will be done. More information on Askja volcanic system is accessible at: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 on the 20th of August with no further escalation."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"The eruption close to Litli-Hrútur was officially declared over on the 15th of August, no activity has been in the crater since 5th of August."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Recent deformation data show uplift in the middle of the Torfajökull caldera. GPS data show a continuation of this trend for the past week. IMO is working on planning extra monitoring stations to be deployed in the area in the coming months. More information on Torfajökull volcanic system is accessible at: https://icelandicvolcanoes.is/?volcano=TOR"}],"additional_notes":""},{"id":485,"published_at":"2023-08-30T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. Uplift continues steadily. Data from the last field trip is still being processed."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3 on the 23rd of August, there was no further escalation."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"Inflation has started again in the Reykjanes peninsula (since beginning of August). The recent GNSS data show movements that might indicate the replenishment of a deep source of magma. Seismicity continues at normal rate in the area and most of the activity lately has been located around Fagradalsfjall, Kleifarvatn and 5 km NE of Grindavík The IMO is monitoring the area closely. More information on Fagradalsfjall: https://icelandicvolcanoes.is/?volcano=FAG"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.7 on the 29th of August, there has been no further escalation."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant change. Uplift continuous steadily."}],"additional_notes":""},{"id":486,"published_at":"2023-09-06T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. Uplift continues steadily."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.9 on the 3rd of September, there was no further escalation."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. GNSS data show steady uplift since beginning of August."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"The uplift of the caldera which commenced in June continues steadily. A team from IMO is visiting the area in these days for installing an additional seismic station, an additional GNSS station, a web camera and to perform geochemical measurements. More information on Torfajökull here: https://icelandicvolcanoes.is/?volcano=TOR"}],"additional_notes":""},{"id":487,"published_at":"2023-09-13T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes, the inflation continues at a steady rate. A field trip is planned for next week: one seismic station and two cameras will be installed. Multigas measurements that were taken during the last field trip to Askja shows no sign of magmatic gases at the surface. More information on Askja: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Because of the unrest experienced at Eldey in July 2023, and considering that no monitoring instrumentation is currently located on this small island, it has been decided to install a GNSS station in Eldey which will help in monitoring this volcanic area and understanding the ongoing processes."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week about 230 earthquakes were detected in between Keilir and Fagradalsfjall. Most of them under M1 in size. A total of 680 earthquakes were detected on Reykjanesskagi which is more than the weeks before. A M3.8 was detected on the 9th of September about 2 km west of Kleifarvatn which most likely caused a rock fall in the vicinity. It was followed by a short swarm aligned along the plate boundary. The inflation confirmed by GNSS data is seen over a large area and is most likely reflecting a deep source which is consistent with the same process occurring prior to the previous eruptions. Deformation is still not detectable by satellite (InSAR). As of today, there is no indication of intrusion (dike propagation). More information on Fagradalsfjall: https://icelandicvolcanoes.is/?volcano=FAG"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week a team from the IMO installed a new seismic station, a GNSS station and a webcam inside the caldera to better monitor the area. Multigas measurements were done and they show no signs of magmatic gases at the surface. The uplift of the caldera which commenced in June this year might be slowing down but it is too early to confirm this trend. More information on Torfajökull here: https://icelandicvolcanoes.is/?volcano=TOR"}],"additional_notes":"The long-term monitoring meeting took place this morning at IMO collecting data and information from different specialists."},{"id":488,"published_at":"2023-09-20T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant change, inflation continues at a steady rate."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant change, seismicity and inflation continues at a similar rate as last week."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes in uplift rate since last week"}],"additional_notes":""},{"id":489,"published_at":"2023-09-27T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Low seismicity, inflation has decreased. See notes below."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant change, seismicity and inflation continues at a similar rate as last week. See notes below."},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":null,"status_text":"A seismic swarm at mnt. Geitafell, three M3,0-3,3 on Sunday night. Seismicity has decreased-----"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"M 3,3 last night (Sept 26), very low aftershock activity---"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"A swarm is ongoing at Sandfellshæð, west of Eldvörp. M3,2 occurred there last night, felt at Grindavík"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Low seismicity; uplift rate seems to be decreasing"}],"additional_notes":"Askja started to show for the first time a change from the regular trend that has been observed over the past 2 years. The process triggering this change might reflect a reduction in magma recharge rate or magma movement. A scientific meeting is scheduled on Friday this week to reassess the status of Askja volcano considering recent data and the summer field campaigns. Fagradalsfjall: cGNSS data continue to show deformation in the peninsula consistent with a recharge of magma at depth. Location and rate of deformation is so far very similar to what has been observed prior to the last three eruptions in the Fagradalsfjall volcanic system."},{"id":490,"published_at":"2023-10-04T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Low seismicity, inflation has decreased. See notes below."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant change, seismicity and inflation continues at a similar rate as last week. See notes below."},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismic swarm at mnt. Geitafell has stopped"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":null,"status_text":"Low seismicity; uplift rate seems to be decreasing"}],"additional_notes":"The electric generator at Grímsfjall (Vatnajökull) is currently out of order and a replacement is planned for the end of October. Therefore, for the time being, monitoring instruments at Grímsfjall (Seismic, cGNSS, Multigas, Webcam, Tiltmeter) are not streaming data to IMO and Grímsvötn and Bárðarbunga volcanoes are not adequately monitored according to IMO‘s standards. Minimum monitoring level is guaranteed by five working seismic stations within 50 km from the volcanoes. Askja: On Friday last week, a scientific meeting was held at the Icelandic Meteorological Office in the presence of IMO specialists, scientists from University of Iceland- Earth Science Department and representatives from the Civil Protection. There is evidence of recent changes in the deformation data (cGNSS) around Askja. The deformation rate has decreased since the beginning of August and the signal has flattened at several stations within or around the caldera. At this stage it is uncertain what process is causing this pressure reduction, possibly the source of the inflation has been shut off or it could be related to an outflow of magmatic fluids. Over the same time period, the seismic activity in the area has not been increasing and there is no evidence of unusual geothermal activity. Further information in a news article published yesterday on IMO’s website. Fagradalsfjall: cGNSS data continue to show deformation in the peninsula consistent with a recharge of magma at depth. Location and rate of deformation is so far very similar to what has been observed prior to the last three eruptions in the Fagradalsfjall volcanic system. A dyke might start to propagate towards the surface with associated highly elevated seismic activity anytime in the next weeks or months. Reykjanes: Ongoing seismic activity at the SW-tip of the Reykjanes peninsula. Around 750 earthquakes detected last week, thereof three earthquakes above M3 and the largest one M3.6."},{"id":491,"published_at":"2023-10-11T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.9 and a M3 on the 4th of October with no further escalation."},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"The electric generator at Grímsfjall (Vatnajökull) is currently out of order and a replacement is planned for the end of October. Therefore, for the time being, monitoring instruments at Grímsfjall (Seismic, cGNSS, Multigas, Webcam, Tiltmeter) are not streaming data to IMO and Grímsvötn and Bárðarbunga volcanoes are not adequately monitored according to IMO‘s standards. Minimum monitoring level is guaranteed by five working seismic stations within 50 km from the volcanoes. Grímsvötn: The seismicity has been above background for the past month and October is likely to be above background level as well. Currently no other geochemical/geophysical data are available for proper assesment. Fagradalsfjall: Inflation at depth is confirmed by both InSAR and cGNSS data. Recent cGNSS data indicate that the inflation is accelerating. Very preliminary model results only based on InSAR indicate the depth of the inflation source is at about 7.5-13 km. The current deformation pattern is consistent with what was observed prior the previous dike intrusions. There is currently no indication of dike propagation, but it might start to propagate towards the surface with associated highly elevated seismic activity anytime in the next weeks or months. Reykjanes: Around 520 earthquakes detected last week, thereof two earthquakes above M3 and the largest one M3.3 located west of Kleifarvatn."},{"id":643,"published_at":"2023-10-18T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.6 on the 14th of October with no further escalation"},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"The electric generator at Grímsfjall (Vatnajökull) is currently out of order and a replacement is planned for the end of October. Therefore, for the time being, monitoring instruments at Grímsfjall (Seismic, cGNSS, Multigas, Webcam, Tiltmeter) are not streaming data to IMO and Grímsvötn and Bárðarbunga volcanoes are not adequately monitored according to IMO‘s standards. Minimum monitoring level is guaranteed by five working seismic stations within 50 km from the volcanoes. Grímsvötn: The seismicity has been above background for the past two months. A total of 11 earthquakes were detected in the past week. Currently no other geochemical/geophysical data are available for proper assessment. Fagradalsfjall: The inflation continues at depth. The current deformation pattern is consistent with what was observed prior the previous dike intrusions. There is currently no indication of dike propagation, but it might start to propagate towards the surface with associated highly elevated seismic activity anytime in the next weeks or months. The seismicity in the area has increase slightly in the past week, a total of 360 earthquakes were detected between Keilir and Festfjall."},{"id":492,"published_at":"2023-10-25T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.9 on the 25th of October with no further escalation"},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"A maintenance trip is ongoing at Grímsfjall (Vatnajökull). All monitoring instruments (Seismometer, cGNSS, Gas, Tiltmeter and Webcam) at Grímsfjall are sending data again. Grímsvötn: The seismicity has been above background for the past two months. A total of 8 earthquakes were detected in the past week which is similar to the week before. The largest earthquake this week was M1.8. Reykjanes peninsula (Fagradalsfjall & Reykjanes-Svartsengi) Fagradalsfjall: Last night an intense earthquake swarm started near Svartsengi, north of Grindavík. Over 700 earthquakes have been detected there since midnight and the swarm is still ongoing. The largest earthquakes detected are M3.9 at 5:35 UTC and M4.5 at 8:18 UTC. This activity is possibly triggered by the ongoing inflation at depth beneath Fagradalsfjall as it happened prior to the eruption in August 2022 or magma has started intruding around the Þorbjörn area. and currently there is no new deformation associated with this swarm. New data will be analyzed as soon as it is available to interpret this activity further. The Civil Defense has moved to uncertainty phase because of the seismic activity in the area."},{"id":493,"published_at":"2023-11-01T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week"},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"See additional notes"}],"additional_notes":"Grímsvötn: The seismicity has been above background for the past two months. A total of 6 earthquakes were detected in the past week which is similar to the week before. The largest earthquake this week was M1.8. Reykjanes peninsula (Fagradalsfjall & Reykjanes-Svartsengi) On 25 October, an intense earthquake swarm began near Svartsengi, north of Grindavík on the Reykjanes Peninsula. So far, over 10,500 earthquakes have been detected in the swarm, with over 26 earthquakes exceeding magnitude three, the largest of which was magnitude 4.5 on 25 October at 08:18 UTC. The latest satellite radar image, acquired late on 31 October, reveals 5 to 6 cm of ground movements over 12 days, centered just northwest of Mt. Þorbjörn. The same displacement signal is seen in continuous GPS measurements from stations in the region. The latest GPS results from 1 November indicate that ground displacements continue at broadly the same rate as in recent days. Combining seismic, geodetic, and satellite-based observations together, we infer that a volcanic intrusion is located at about 4 km depth just northwest of Mt. Þorbjörn. Presently, there are no indications that the volcanic intrusion is becoming shallower. We expect that seismicity will continue northwest of Mt. Þorbjörn, and this could include felt earthquakes exceeding magnitude four. Triggered earthquake activity is also possible in the coming days due to stress increases caused by the intrusion. This is a likely explanation for the ongoing seismic activity detected west of Þorbjörn in Eldvörp on 1 November. Triggered seismicity is also possible due to the long-term effects of magma accumulation beneath Fagradalsfjall."},{"id":494,"published_at":"2023-11-08T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week"},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Deformation data shows that uplift continues in the area NW of Mt. Þorbjörn at a steady rate since the start of the inflation (27th October), although an acceleration of the process has been observed between days. Since the start of the inflation, the maximum uplift at GNSS stations stations around Mt. Þorbjörn has reached over 8 cm. The deformation is caused by a sill-type intrusion at around 5 km depth. Presently, there are no indications that the volcanic intrusion is becoming shallower. Modelling, based on data since 27th of October, indicates that the volume change associated with this inflation event has reached almost two times the volume change associated with the four previous inflation events in the same area between 2020-2022. Average inflow of magma/magmatic fluids, based on model results, into the sill-type body is estimated at approximately 5 m3/s (uncertainty: ±2 m3/s) Intense seismicity is associated with this inflation event and in the last week almost 10.000 earthquakes have been recorded in the area and the largest event was M4.5 on 3rd of November. Fagradalsfjall: Inflation continues at a steady rate, since August, due to magma accumulation at depth."}],"additional_notes":""},{"id":495,"published_at":"2023-11-15T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week"},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"On 10 November a large magmatic dike began to propagate just east of the Svartsengi geothermal region. The intrusion is approximately 15 km in length, and it extends from just north of Sundhnúkur to just offshore to the southwest of the coastal town of Grindavík in southwest Iceland. The intrusion lies beneath Grindavík, with the largest surface deformation observed in the western part of Grindavík. As of Sunday evening (12 Nov), geodetic modelling suggests that the intrusion had a volume of 120 million cubic meters. This is about three times larger than the largest dike intrusion in Fagradalsfjall, which occurred in February-March 2021. Yesterday and the day before, a DOAS instrument, scanning over the central part of the dike, detected measurable amount of SO2 in the atmosphere. This could indicate that magma has reached shallower depth (<500 m) in some segments along the dike. At this stage, the likelihood for an eruption is considered high, with the most likely scenario to be an effusive eruption on land. Fagradalsfjall: Inflation continues at a steady rate, since August, due to magma accumulation at depth."}],"additional_notes":""},{"id":496,"published_at":"2023-11-22T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week"},{"volcano_code":"FAG","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Inflation at Svartsengi resumed soon after the magma intrusion formed on 10 November, and presently the area is inflating at a faster rate than before the intrusion occurred. The inflow rate is estimated to be about 13 ± 8 m3/s with a source below 5 km depth. The inflow rate to the intrusion has reduced and is now similar to the inflow rate at Svartsengi. Overall, seismicity has declined in the past week. Around 9700 earthquakes were detected in the past week. The largest earthquake was a magnitude 3.0 on the 17 November, located near Hagafell. An eruption is still considered likely - most likely near Sundhnúkar crater row (approximately 4 km NNE of Grindavík), although other locations above the intrusion cannot be excluded. The situation could change rapidly as a new phase of magma inflow to the intrusion could begin in the near future. The area continues to be monitored closely by IMO. Fagradalsfjall: Inflation continues at a steady rate, since August, due to magma accumulation at depth."}],"additional_notes":""},{"id":497,"published_at":"2023-11-29T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"See additional notes"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes from last week."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Ground deformation nearby Svartsengi and along the dike has been slowing down since last week. The current deformation occurring in the area is dominated by the signal associated with the magma inflow underneath Svartsengi that, from geodetic modelling results, is estimated to be about 10 times larger than the one feeding the dike. The sector of the dike which is currently active and receiving new magma (as indicated by both deformation and seismic data) is still confined to the area east of Sýlingarfell. The seismicity also has been overall declining in the past weeks Around 3900 earthquakes were detected in the past week. The largest earthquake in the dike was a magnitude 3.0 on 27 November, located SE of Sýlingarfell. At this stage, an eruption is still considered likely - most likely near Sundhnúkar crater row (approximately 4 km NNE of Grindavík). The situation could change rapidly as a new pulse of magma inflow to the dike could begin any time in the near future. The area continues to be monitored closely by IMO. Askja: Over the past two months the deformation in Askja has significantly reduced. The most recent cGPS data suggest that the inflation process has likely stopped. A team of technicians from the IMO are currently in Askja to fix few GPS stations which have been offline since mid of November."}],"additional_notes":""},{"id":498,"published_at":"2023-12-06T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant change since last week. GPS stations are now back online."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Geodetic modelling results show that magma is likely not flowing into the dike that formed on 10 November. However, ground deformation nearby Svartsengi show continued uplift and magma accumulation at depth in that area. At this stage, an eruption from the dike is considered less likely. The situation could change rapidly as a new pulse of magma inflow into to the dike could begin any time in the near future. Most likely, if a new magma inflow to the dike will occur, ground deformation will show rapid changes and the seismicity will intensify considerably."}],"additional_notes":""},{"id":499,"published_at":"2023-12-13T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant change since last week."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Recent GPS measurements of the height of the ice-covered lake in Grímsvötn show that the ice shelf recently started to slowly subside. It has subsided approximately 30 cm or about 3 cm per day. The rate is slow but indicates that water is leaking from lake Grímsvötn. This could develop into a glacial flood, but it is also possible that the water level will continue to decline at a similar rate without a flood occurring. Volume of lake Grímsvötn is now about one third of what it was prior to glacial flood in the end of 2021, so if a flood would start in the coming days or weeks, it would be a small flood.​ There are past examples of Grímsvötn eruptions starting, following a flood. The drainage of the water from Grímsvötn lake reduces the pressure on top of the volcano and this can allow an eruption to begin. This happened in 2004, and before that in 1934 and in 1922. However, twelve glacial floods have occurred since 2004 without triggering an eruption. The most likely scenario, if a flood occurs now, is that it will not trigger an eruption. ​ Seismicity over the past 3 months has been above background"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The area around Svartsengi continues to inflate. The rate of inflation has decreased somewhat since Friday, but it is still greater than it was prior to the formation of the dike that travelled under Grindavík on November 10. While magma continues to accumulate around Svartsengi, further dike formations or an eruption remain possible. If another dike forms, it will most likely follow the same path as the November 10 dike. The most likely location for a potential eruption under these conditions is assessed to be north of Grindavík in the direction of Hagafell and the area around Sundhnúkagígar. Seismic activity continues at a similar level to the previous days. It is generally weak and mostly in the area around Hagafell."}],"additional_notes":""},{"id":500,"published_at":"2023-12-20T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant change since last week."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Recent GPS measurements of the height of the ice-covered lake in Grímsvötn show that the ice shelf recently started to continous to slowly subside. It has subsided approximately 60 cm or about 3 cm per day. The rate is slow but indicates that water is leaking from lake Grímsvötn. This could develop into a glacial flood, but it is also possible that the water level will continue to decline at a similar rate without a flood occurring."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"An effusive fissure eruption started north of Grindavík at 22:17 UTC on 18th of December. The eruption is still ongoing. The intensity of the eruption decreased rapidly after its onset. Magma discharge during the first hours of the eruption is roughly estimated 200-300 m3/s. The eruption started on a roughly 4 km long fissure but soon the eruptive activity focused on smaller parts of the fissure. Today there is activity in two craters at 22,3793457°W 63,8849347°N and 22,3642719°W 63,8928406°N. Roughly estimated discharge now from the craters is 5-10m3/s and SO2 release from the eruption is approximately 90 m3/s."}],"additional_notes":""},{"id":501,"published_at":"2023-12-27T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"About seven earthquakes were recorded in the past week in Grímsvötn, the largest was a M2.8 on 25 December on the western edge of the volcano caldera. The water leakage that commenced in the begining of December from lake Grímsvötn continues at a slow rate. This could develop into a glacial flood, but it is also possible that the water level will continue to decline at a similar rate without a flood occurring."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The effusive fissure eruption which started north of Grindavík on 18 December ended after about 55 hours. The beginning of the eruption was characterized by high magma extrusion rates assessed to be about 300 m3/s, which declined very rapidly. The eruption started on a 4 km long fissure but soon the eruptive activity focused on few smaller parts of the fissure. Since the end of the eruption, the uplift in the Svartsengi region started again and it continues at a very stable rate. Geodetic modelling results indicate that about 11 millions m3 of magma were intruded into the dike which formed on 18 December. A very well comparable amount of magma was withdrawn from the Svartengi reservoir at the same time. Modelling results also indicate that the pre-eruptive magma volume which intruded in the Svartsengi area was significantly higher, and only a part of it fed the eruption on 18 December. It is possible to assess that the volume of magma which has been withdrawn from the main deep reservoir will be recharged in Svartsengi in 1-2 weeks time, however it is uncertain up to which level the system needs to be reached to trigger the next eruption, thereof it is difficult to anticipate when the next eruption will occur. The aviation color code was changed back to Yellow on 22 December when the eruption was declared to be over."}],"additional_notes":""},{"id":502,"published_at":"2024-01-03T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.6 on 31st of December. No further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"About ten earthquakes were recorded in the past week in Grímsvötn, the largest was a M2.4 on 29 December on the eastern edge of the volcano caldera. GNSS instrument on Grímsvötn ice covered lake has not sent any data recently due to shortage of power, therefore there is no available information on a leakage of geothermal water from lake Grímsvötn. There are no clear signs of geothermal water in Gígjukvísl river which would be an indication of a flood from Grímsvötn."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"Today, 3 January a M4.5 was detected about 3.5 km west of Kleifarvatn, several aftershocks over M3 have followed. The earthquakes are thought to be triggered activity from Svartsengi."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The inflation at Svartsengi continues and it has now reached the same level as prior to the eruption on 18 December. As of yesterday the newest GPS data show that the rate of ground displacement at Svartsengi is decreasing. The deceleration of inflation might indicate that the level of pressure has reached a threshold within the system, therefore the chances of new dike intrusion and volcanic eruption have increased. This is a similar change in ground displacement that was observed at the end of the day on December 15, which culminated in an eruption three days later. However, it is difficult to assert whether this pattern will repeat. Should an eruption occur, the Sundhnúkur crater row, between Stóra-Skógafell and Hagafell, remains the most probable location for an eruption. However, it is important to note that magma migration does not always result in an eruption, as demonstrated by the activity at Fagradalsfjall and during the Krafla Fires event. In the past week about 1300 earthquakes have been detected over the dike intrusion of which only 56 over M1 and one over M2. Seismic activity continues to be measured also west of Fagradalsfjall, where around 100 small earthquakes have been recorded since December 29. Further analysis of the monitoring data will soon be conducted to obtain a clearer picture of the situation at Fagradalsfjall."}],"additional_notes":""},{"id":503,"published_at":"2024-01-10T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The ground uplift in Askja continues and very low seismicity has been detected."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of M4 occurred in the middle of the caldera on January 17. No further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"The recent glacial outburst flood (jökulhlaup) from Grímsvötn is finished. The aviation colour-code (ACC) for Grímsvötn was increased temporarily to yellow to reflect the increased likelihood of a volcanic eruption due to pressure-related changes while meltwater drained from Grímsvötn. The ACC was lowered again to green on 22 January, when the glacial outburst flood was over. Last week 28 earthquakes were detected in Grímsvötn, thereof two above M2.0. The long-term situation at Grímsvötn is considered to be above background levels. Over monthly scales, seismicity at Grímsvötn remains high and has been above background levels for the last five months. General information about Grímsvötn can be found in the Catalogue of Icelandic Volcanoes"},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"The eruption which commenced on January 14 next to Hagafell (~ 2 km north of Grindavík) lasted for less than 2 days. Currently no eruption is ongoing. However, deformation data (both GPS and satellite InSAR data) indicate that magma continues accumulating at a depth of about 4 km underneath the Svartsengi region. Based on how the activity has been evolving in the past months and its cyclic behaviour, it is expected that another eruptive event might occur in the next weeks when the amount of accumulated magma will be enough to build up sufficient over pressure. In the past week, about 280 earthquakes have been detected in the area of the unrest. Most of the earthquakes are located aorund Hagafell and south of Sundhnúksgigar. All of them have been below M2 and the majority of them have been small with magnitude below M0.5. General information about Reykjanes can be found in the Catalogue of Icelandic Volcanoes The latest news on Reykjanes-Svartsengi is accessible on IMO‘s website"}],"additional_notes":""},{"id":504,"published_at":"2024-01-17T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No change since last week"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 on January 14 and a M3.2 on January 11. No further escalation."},{"volcano_code":"GRV","vona_color_code":"YELLOW","vals_level":null,"status_text":"The glacial flood is believed to have reached its peak on the evening on January 13 based on a change in the seismic tremor signals. Discharge and conductivity in Gígjukvísl increased until Sunday night (January 14), at which point the discharge stabilized, indicating that the river has reached its peak flow. It is expected that the flow will gradually decrease in the coming days until the flood subsides. The seismometer at Grímsfjall has recorded increased tremor, which is likely related to heightened geothermal activity in the Grímsvötn geothermal system and is a phenomenon commonly observed towards the end of glacial outburst floods. Similar unrest has been documented during previous jökulhlaups from Grímsvötn. There are past examples of Grímsvötn eruptions starting, following a flood. The drainage of the water from Grímsvötn lake reduces the pressure on top of the volcano and this can result in an eruption. This happened in 2004, and before that in 1934 and in 1922. However, twelve glacial floods have occurred since 2004 without triggering an eruption. Seismicity over the past 4 months has been above background. Last week about 30 eartquakes were detected where the largest was a M4.2 on January 11, which is the largest earthquake detected in Grímsvötn since beginning of measurments (1991). General information about Grímsvötn can be found here https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"An intense earthquake swarm started at the Sundhnúksgígar crater row around 03:00 UTC December 14. Seismicity moved towards the town of Grindavík and real time GPS measurements and borehole pressure readings (from HS-Orka) showed major changes with the onset of the earthquake activity confirming magma movement in the region. At 07:57 UTC a volcanic eruption started from a fissure that opened up south east of Mt. Hagafell and was about 900 m long and about 900 m from Grindavík town. At 12:05 UTC another eruptive fissure, about 100 m long, opened up about 200 m from the northernmost part of Grindavík. Currently there is no volcanic activity visible in the eruption fissures that formed on January 14. The southern and shorter fissure was active during about 10 hours (from 12-22 h UTC) and the last visible activity from the northern and longer fissure was observed around 01:00 UTC January 16. Most of the emitted lava was produced by the northern fissure. Due to this magma movement the seismicity increased in the last week with about 3900 earthquakes detected over the dike intrusion of which 37 eartquakes over M2 and five over M3. Largest was a M3.6 on January 14. Seismic activity continues to be measured also west of Fagradalsfjall, where around 125 small earthquakes have been recorded. After the eruption started the seismic activity decreased, signifying that the area is stabilizing. Most seismic activity is located near Mt. Hagafell, close to the northern eruptive fissure. GPS sensors continued to detect ground deformation in and around Grindavík on January 16, illustrating that the magma conduit beneath Grindavík is still causing expansion in the area. New (eruptive) fissure opening over the dike cannot be ruled out in the coming days. In the events on January 14 a new graben formed in the eastern part of Grindavík. Thermal drone images show that fissures previously mapped southwest of Grindavík have significantly enlarged. General information about Reykjanes can be found here https://icelandicvolcanoes.is/?volcano=REY"}],"additional_notes":""},{"id":505,"published_at":"2024-01-24T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The ground uplift in Askja continues and very low seismicity has been detected."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of M4 occurred in the middle of the caldera on January 17. No further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"The recent glacial outburst flood (jökulhlaup) from Grímsvötn is finished. The aviation colour-code (ACC) for Grímsvötn was increased temporarily to yellow to reflect the increased likelihood of a volcanic eruption due to pressure-related changes while meltwater drained from Grímsvötn. The ACC was lowered again to green on 22 January, when the glacial outburst flood was over. Last week 28 earthquakes were detected in Grímsvötn, thereof two above M2.0. The long-term situation at Grímsvötn is considered to be above background levels. Over monthly scales, seismicity at Grímsvötn remains high and has been above background levels for the last five months. General information about Grímsvötn can be found in the Catalogue of Icelandic Volcanoes"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The eruption which commenced on January 14 next to Hagafell (~ 2 km north of Grindavík) lasted for less than 2 days. Currently no eruption is ongoing. However, deformation data (both GPS and satellite InSAR data) indicate that magma continues accumulating at a depth of about 4 km underneath the Svartsengi region. Based on how the activity has been evolving in the past months and its cyclic behaviour, it is expected that another eruptive event might occur in the next weeks when the amount of accumulated magma will be enough to build up sufficient over pressure. In the past week, about 280 earthquakes have been detected in the area of the unrest. Most of the earthquakes are located aorund Hagafell and south of Sundhnúksgigar. All of them have been below M2 and the majority of them have been small with magnitude below M0.5. General information about Reykjanes can be found in the Catalogue of Icelandic Volcanoes The latest news on Reykjanes-Svartsengi is accessible on IMO‘s website"}],"additional_notes":""},{"id":506,"published_at":"2024-01-31T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The GNSS monitoring stations inside Askja caldera have not sent any data recently due to power issues caused by winter conditions in the area. Recent data from the closest GNSS station, just outside the caldera, indicate that deformation continues at a similar rate. Ten earthquakes were detected in Askja last week and seismicity remains stable between weeks. General information about Askja can be found here: https://icelandicvolcanoes.is/?volcano=ASK."},{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":null,"status_text":"A minor earthquake swarm occurred on January 27 and 28, with the largest earthquakes of M3.1. This swarm is most likely caused by tectonic movements rather than magma accumulation. In fact there are historical examples of large earthquakes above M6 along mapped faults in the area, close to where the recent swarm occurred."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of M3.1 occurred on January 25. No further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week 10 earthquakes were detected in Grímsvötn, which is less than the week before when 28 earthquakes were located there. The largest earthquake last week was M2.1. Total of 57 earthquakes (>M0.8) were located in Grímsvötn in January, which is higher than in previous months. When looking at the long term trend, the seismicity at Grímsvötn results to be above background level for the last five months. General information about Grímsvötn can be found here: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Deformation data indicate that magma continues accumulating at a depth of about 4 km underneath the Svartsengi region. Based on how the activity has been evolving in the past months and its cyclic behaviour, it is expected that another eruptive event might occur in the next weeks when the amount of accumulated magma will be enough to build up sufficient over pressure. Seismic acitivity in the Grindavík-Svartsengi region continues to decline. In the past week, about 170 earthquakes were detected in the area of the unrest, compared to around 300 in the week before. Most of the earthquakes are located around Hagafell and south of Sundhnúksgigar. All of them have been below M2 and the majority of them have been small with magnitude below M0.5. General information about Reykjanes can be found here https://icelandicvolcanoes.is/?volcano=REY The latest news on Reykjanes-Svartsengi is accessible on IMO‘s website: https://en.vedur.is/about-imo/news/a-seismic-swarm-started-north-of-grindavik-last-night"}],"additional_notes":""},{"id":507,"published_at":"2024-02-07T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Data from GNSS stations inside the Askja caldera was retrieved again last week. They show continuing inflation at a similar rate as before. Thirteen earthquakes, all below M1.5, were detected in Askja last week and seismicity remains stable between weeks. General information about Askja can be found here: https://icelandicvolcanoes.is/?volcano=ASK."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week four earthquakes were detected in Grímsvötn and the largest earthquake last week was M1.4. Total of 57 earthquakes (>M0.8) were located in Grímsvötn in January, which is higher than in previous months. When looking at the long term trend, the seismicity at Grímsvötn results to be above background level for the last five months. General information about Grímsvötn can be found here: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake M3.6 occured on 6 February. No further escalation."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake M3.3 occured on 2 February. No further escalation."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Ongoing magma accumulation beneath the Svartsengi-Þorbjörn area continues, even though the rate of inflation has decreased slightly in recent days. Similar processes were observed before the previous dyke intrusions and eruptions north of Grindavík in January 2024 and December 2023. According to updated geodetic models based on satellite and GNSS data covering the interval from 16 January to 5 February, the volume of magma recharge to the Svartsengi reservoir is now estimated at about 9 million m3. From geodetic modelling of the January 2024 intrusion and eruption, it is estimated that approximately 9 to 13 million cubic meters of magma flowed from the Svartsengi magma reservoir, feeding the eruption that began near Hagafell on 14 January. Therefore, the estimated volume of magma recharge has now reached the lower limit of the amount believed to have been tapped in January. Consequently, there is an increased likelihood of a new magmatic dyke intrusion and ensuing volcanic eruption in the coming days to weeks. Last week over 400 earthquakes were detected in the area north of Grindavík. Most of the earthquakes were small, below M1.0, but the largest one was M2.2. More information about the Reykjanes-Svartsengi volcanic system is available here: https://icelandicvolcanoes.is/?volcano=REY"}],"additional_notes":""},{"id":508,"published_at":"2024-02-14T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Data from GNSS stations around Askja show continuing inflation at a similar rate as before. Seismicity remains stable between weeks and 17 earthquakes were detected in Askja last week, all below M2.0. General information about Askja can be found here https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week thirteen earthquakes were measured in Grímsvötn, the largest one M1.8. When looking at the long term trend, the seismicity at Grímsvötn results to be above background level for the last five months. General information about Grímsvötn can be found here: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"An intense earthquake swarm started at the Sundhnúksgígar crater row around 05:25 UTC 8 February. At 06:02 an eruption started between Sundhnúkur and Mt. Stóra Skógfell on a roughly 3 km long fissure. The eruption lasted just over one day and no eruptive activity was observed in a drone-flight over the eruptive site carried out at noon 9 February. During the eruption the surface in Svartsengi area subsided about 10 cm in Svartsengi area when magma flowed from there towards Sundhnúkur crater row. After the eruption ended, inflation at Svartsengi resumed and the Inflation rate is about 0.5-1.0 cm/day which is in similar to the rates detected prior to last eruptions. Magma thus continues to accumulate in the magma reservoir beneath Svartsengi. It is therefore highly likely that the cycle continues in a few weeks with another dyke propagation and a volcanic eruption. Seismicity in the area has been low since the eruption ended. More information about the Reykjanes-Svartsengi volcanic system is available here: https://icelandicvolcanoes.is/?volcano=REY"}],"additional_notes":""},{"id":509,"published_at":"2024-02-21T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Data from GNSS stations around Askja show continuing inflation at a similar rate as before. Seismicity remains stable between weeks and 15 earthquakes were detected in Askja last week, all below M1.0. General information about Askja can be found here https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.7 earthquake on 16 February. No further escalation."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"On 16 and 17 February a seismic swarm occurred near Eldey. About 70 earthquakes were detected and largest one M3.3. Seismic swarms similar to this one have occurred regularly near Eldey in the previous years. A GPS instrument was installed on Eldey in beginning of December 2023. The time series so far does not show any changes in relation to this activity. General information about Eldey can be found here: https://icelandicvolcanoes.is/?volcano=ELD"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week 12 earthquakes were measured in Grímsvötn, the largest one M1.5. When looking at the long term trend, the seismicity at Grímsvötn results to be above background level for the last five months. General information about Grímsvötn can be found here: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Inflation and magma accumulation at Svartsengi continues. It was estimated that when the eruption began on the 8th of February, about 10 million m3 of magma propagated from Svartsengi towards Sundhnúkur crater row. If the inflation continues at same rate, a total of 10 million m3 will be accumulated by the end of February or beginning of March, by which time likelihood of dyke propagation and volcanic eruption will increase significantly. Seismicity in the area has been low since the eruption ended. Updated Hazard map has been issued on 20 February. Further information are available on IMO's website: https://en.vedur.is/"}],"additional_notes":""},{"id":510,"published_at":"2024-02-28T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Data from GNSS stations around Askja show continuing inflation at a similar rate as before. Seismicity remains stable between weeks and 10 earthquakes were detected in Askja last week, largest was a M2.9 on 25 February. General information about Askja can be found here https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.1 on 23 February and M3.2 on 25 February. No further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week 12 earthquakes were measured in Grímsvötn, the largest one M2.8. When looking at the long term trend, the seismicity at Grímsvötn results to be above background level for the last six months. General information about Grímsvötn can be found here: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"Small seismic swarm occurred on 26 February east of Kleifarvatn. A total of 70 earthquakes were detected and the largest earthquake was a M3.4"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The amount of magma accumulated beneath Svartsengi prior to the three volcanic eruptions that have occurred since December 2023 has been estimated to be 8-13 million m3. Geodetic modelling (from February 27), based on interferograms and real-time GNSS displacement, indicates that magma accumulation in the Svartsengi reservoir now has reached 7.7-8 million m3, recharging at an average rate of 415,000 m3/day. Hence, the accumulated magma beneath Svartsengi is reaching the same amount as prior to previous eruptions increasing the likelihood of a volcanic eruption in the coming days. Additionally, seismic activity has increased slightly since February 24, like was observed days before previous volcanic eruptions in the area. The location of the seismic activity is east of Mt. Sýlingarfell, in an area which is considered to be the eastern tip of the Svartsengi reservoir. If an eruption occurs, magma will most likely propagate from the Svartsengi reservoir towards Sundhnúkur crater row, resulting in lava fountaining and lava flows in the area between Mt. Stóra-Skógfell and Mt. Hagafell. The primary signal of ascending magma is a sudden increase in seismic activity with many localized, small magnitude earthquakes. Considering the previous volcanic eruptions in the area, an eruption could start with very little warning (less than 30 minutes), depending on where magma reaches the surface on the Sundhnúkur crater row. A total of 170 earthquakes have been detected where the largest earthquake was a M2.1 on 26 February located east of Mt. Sýlingarfell. Further information are available on IMO's website: https://en.vedur.is/"}],"additional_notes":""},{"id":511,"published_at":"2024-03-06T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. General information about Askja can be found here https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. General information about Grímsvötn can be found here: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"Small seismic swarm was detected around Kleifarvatn on the same day as the magma intrusion on 2 March. About 170 earthquakes were detected and the largest was a M2.4 located in Kleifarvatn. General information about Krýsuvík can be found here: https://icelandicvolcanoes.is/?volcano=KRY"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"On 2 March an increase in seismic activity started at Mt. Sýlingarfell ~15:20 UTC, suggesting migration of magma from the Svartsengi reservoir. At that time, the town of Grindavík and the Blue Lagoon were evacuated due to the increased likelihood of an eruption. The activity however, subsided steadily after 18:00 UTC and was mostly over by about 20:00 UTC with no magma reaching the surface. The seismicity over the dike has been low since the magma propagation ended (2 March). Geodetic modelling (initialized with both GNSS and InSAR data) indicates that magma reached a depth of about 1.3 km over an ~3.6 km long dike, located at about 1 km east of Sýlingarfell between Mt. Stóra-Skógfell and Mt. Hagafell. Model calculations indicate a volume loss of about -1.3 million cubic meters from the Svartsengi magma reservoir on Saturday which fed the dike. The volume loss from the Svartsengi reservoir was much lower than that which occurred during previous events, where a volume loss of about -10 million m3 (or greater) has been calculated. Continued land uplift is detected on GNSS observations since Saturday‘s dike propagation. Magma inflow beneath Svartsengi thus continues and model calculations suggest an accumulation rate of about half a million m3 per day. In total, about 10 million m3 of magma has now been recharged to the reservoir beneath Svartsengi since the eruption on 8-9 February. Therefore, pressure in the magma reservoir continues to build up, and there is an increased likelihood of another dike propagation within the Sundhnúkur crater row and/or a volcanic eruption in the coming days. If an eruption occurs, magma will most likely propagate from the Svartsengi reservoir towards Sundhnúkur crater row, resulting in lava fountaining and lava flows in the area between Mt. Stóra-Skógfell and Mt. Hagafell. The primary signal of ascending magma is a sudden increase in seismic activity with many localized, small magnitude earthquakes. Considering the previous volcanic eruptions in the area, an eruption could start with very little warning (less than 30 minutes), depending on where magma reaches the surface on the Sundhnúkur crater row. A total of 580 earthquakes have been detected where the largest earthquake was a M3.1 on 2 March located east of Mt. Sýlingarfell. General information about Reykjanes can be found here: https://icelandicvolcanoes.is/?volcano=REY https://en.vedur.is/volcanoes/fagradalsfjall-eruption/"}],"additional_notes":""},{"id":512,"published_at":"2024-03-13T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. General information about Askja can be found here https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 on 7 March with no further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. General information about Grímsvötn can be found here: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Model calculations show that magma accumulation at Svartsengi continues at a steady rate. In previous events a magma intrusion has formed when the volume of accumulated magma has reached 8 to 13 million cubic meters. The total volume accumulated now has already reached this threshold. Pressure buildup therefore continues to increase in the Svartsengi magma reservoir and likelihood of a new dike intrusion and even an eruption in the next days is increased. A total of 270 earthquakes have been detected with the largest a M2.8 on 8 March, located SE of Þorbjörn. Seismic activity in the area has increased slightly in the past few days compared to last week, which can possibly be linked to calmer winds and optimal weather conditions for earthquake detections. If an eruption occurs, magma will most likely propagate from the Svartsengi reservoir towards Sundhnúkur crater row, resulting in lava fountaining and lava flows in the area between Mt. Stóra-Skógfell and Mt. Hagafell. The primary signal of ascending magma is a sudden increase in seismic activity with many localized, small magnitude earthquakes. Considering the previous volcanic eruptions in the area, an eruption could start with very little warning (less than 30 minutes), depending on where magma reaches the surface on the Sundhnúkur crater row. General information about Reykjanes can be found here: https://icelandicvolcanoes.is/?volcano=REY"}],"additional_notes":""},{"id":513,"published_at":"2024-03-20T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes in this area."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M4.4 on March 18th and M3.2 on March 14th."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes. General information about Grímsvötn can be found here: https://icelandicvolcanoes.is/?volcano=GRV"},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"A volcanic eruption started the 16th of March at 20:23 UTC between Mt. Hagafell and Mt. Stóra Skógfell. A 2.9-km-long fissure formed quickly with an effusive eruption and the plume consisted mainly of steam and gas. A lava front extended to the west from Sundhnúkur crater row. This front inundated Grindavíkurvegur in the early hours of Sunday morning at around 00:30 UTC, making the road impassable. Lava also travelled southwards, and it is now less than 250 m from Suðurstrandarvegur – the main road on the southern coast of the Reykjanes Peninsula. The eruption continues, with a pretty stable rate over the past 24 hours. The volcanic plume height is still confined within few km with no ash detected. Seismic activity is minor within the area. Since the past 24 hours, lava and gas are released by a series of active vents located in the southern part of the original fissure which opened in the beginning of the eruption. Lava continues flowing from these locations southward. There has been no advancement in the lava flow front towards Suðurstrandavegur and Svartsengi in the past 24 hours. On 17th March SO2 fluxes up to about 50 kg/s have been measured, but more recent DOAS measurements suggest the SO2 flux has reduced significantly. Preliminary data from orthophotos indicate this is likely the largest eruption occurring in the area in terms of lava extrusion rate and total volume. Satellite images from 17. to 18. of March show a clear sign of inflation in Svartsengi region. However GPS measurements from 18th of March suggest a decrease in the inflation rate. This might indicate that the magma is reaching the surface by Sundhnúkur crater row and it is, possibly, not accumulating beneath Svartsengi as it did before. Gas dispersal forecast is accessible here: https://en.vedur.is/volcanoes/fagradalsfjall-eruption/volcanic-gases/ The latest hazard map is accessible here: https://en.vedur.is/volcanoes/fagradalsfjall-eruption/hazard-map/ The latest news is accessible here: https://en.vedur.is/about-imo/news/volcanic-unrest-grindavik"}],"additional_notes":""},{"id":514,"published_at":"2024-03-27T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"On 25 March, a seismic swarm occurred in the NW part of the Askja caldera. About 30 earthquakes were detected between 08.00UTC and midday. The largest earthquake detected had a magnitude M3,5 at a depth of about 5 km. Three earthquakes with magnitudes between M2 and M2,5 were also detected, the rest of the activity was characterized by smaller events. Overall, the seismic activity in the Askja has been quite stable between months and unchanged until yesterday. Looking back, we can see that earthquakes with magnitude above M3 were detected in January 2022 and October 2021. Deformation at Askja continued with a stable rate for two years since the end of summer 2021. In the last autumn, the GNSS data indicated though a change in velocity as reported in a dedicated news piece. However, the most recent ground deformation measurements based on GNSS data suggest that the rate has increased again, even though it remains at lower rates as observed prior the autumn in 2023. Additional data, which will be collected in the next days, will help in clarifying and confirming the trend of the deformation process in the area."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.5 on 25 March, no further escalation."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"No significant changes in this area."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing effusive eruption since 16 March. The activity is concentrated now at three vents in the southern part of the eruptive fissure, which opened on the 16th. The activity decreased slightly on 24 March (confirmed by visual observations and tremor signals) but has remained stable since then. High gas concentrations were measured at ground level yesterday 26 March as well as this morning. The areas which have been largely affected by gas pollution are the Svartsengi geothermal power plant (closed for operation yesterday), Blue Lagoon and Grindavík, all of them within a distance up to 3 km from the eruption site. The lava field has been mainly progressing to the south and east of the vents, and it has been getting close to the barriers protecting the town of Grindavík. Work is in progress to increase the high of the barriers. GPS measurements in recent days indicate ongoing land rise in Svartsengi, but it exhibits a slower rate than before. This suggests that magma continues to accumulate in the reservoir beneath Svartsengi despite the ongoing eruption."}],"additional_notes":""},{"id":515,"published_at":"2024-04-03T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismic activity has been stable in the past week. Deformation measurements based on GNSS data show that the rate of uplift has increased again at the station OLAC, which is located close to the middle of the caldera. Other stations in the area do not show significant changes in the deformation rate. More deformation data, which will be collected in the coming days and weeks, will help in confirming if this trend is real and in understanding if the process causing the uplift has been accelerating with time. For further information on Askja see: https://icelandicvolcanoes.is/?volcano=ASK"},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The effusive eruption, which commenced on 16 March, continues. The activity is concentrated now at two vents in the southern part of the eruptive fissure, which opened on the 16th. The activity has been stable since 25 March (confirmed by visual observations and tremor signals) apart from third vent ceasing activity on 1 April. GNSS measurements in recent days show that uplift in Svartsengi has stopped, indicating that magma is now flowing straight to the vents without accumulating in the magma region underneath Svartsengi. The lava field has been mainly increasing in thickness with occasional small lava outbreaks. The average lava extrusion rate (as assessed by satellite images by colleagues from LMI) for the period 20 -27 March, was ~ 8 m3/s. Bush fires have been occurring around the lava fronts in the past days and caused some issues for the air quality in the area. In the past days, high values of sulfur dioxide have been detected in Grindavík and in the area surrounding the eruption site, resulting in the Blue Lagoon touristic center being closed. For further information on Reyjanes see here: https://icelandicvolcanoes.is/?volcano=REY The latest news are available here: https://en.vedur.is/about-imo/news/volcanic-unrest-grindavik"}],"additional_notes":""},{"id":516,"published_at":"2024-04-10T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"A low seismic activity has been detected in the area in the past week. Most of the earthquakes were located in the eastern part of the caldera rim, where there is a well known geothermal area. The data from the GNSS station close to the center of the caldera continues to show an accelerating trend in the up component, however the process causing it is still unclear. This could possibly reflect a very local process (not excluded related to weather). More data that will be acquired in the coming days/weeks will help in interpreting this trend."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Over the past weeks, we have generally observed an increase in the seismic activity in Bárðarbunga. Even though the system occasionally detect large earthquakes (above M4), the majority of the earthquakes are small (below M1). Deformation in the area has continued since the end of the eruption in 2015."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"For the past month, the seismicity in Grímsvötn has been within the normal background level. No unusual data are detected by other instruments monitoring the area."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption commenced in Sundhnúks crater row continues. The volcanic activity is occurring in the southern end of the volcanic fissure with lava and volcanic gas release. Only one vent remains active. On April 8 the Icelandic Institute of Natural History and the LMÍ surveying team flew over the lava field to acquire images for the lava flow rate and volume estimates. The results showed that the flow rates are slowly decreasing. The average flow rate between 3. and 8. April showed an average of 3.6 m3/s. The lava mostly propagates towards the south however, on April 7, the crater opened to the north enabling the lava to flow also over the northern side for a short period of time. The latest DOAS traverse (performed on 8. April) gave an estimate of SO2 flux of 10-18 kg/s. Deformation data from GNSS measurements indicate that the uplift rate in the Svartsengi region has increased in the past week. At the same time the strength of the eruption has decreased. This suggests that the volume of magma accumulating in Svartsengi is now larger than the amount of magma reaching the surface at Sundhnúk."}],"additional_notes":""},{"id":517,"published_at":"2024-04-17T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismicity has been low in the past week, only 9 earthquakes were detected. The data from the GNSS station close to the center of the caldera continues to show a high rate trend in the up component, however the process causing it is still unclear. A team of technicians are heading to Askja this week and will hopefully be able to confirm if the signal is real or caused by other factors."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismic activity at Bárðarbunga continues, about 50 earthquakes were detected where the largest was a M3 on 10 April. However, the majority of the earthquakes are below M1."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"On 13 April a small seismic swarm was detected in Kleifarvatn, the largest earthquake was a M3.3. A total of 110 earthquakes were detected, there was no further escalation."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption, commenced in Sundhnúks crater row on 16 March, continues. The volcanic activity is occurring in the southern end of the volcanic fissure with lava and volcanic gas release. Yesterday (16 April) marks one month since the beginning of the eruption which makes it the second largest eruption in the Reykjanes peninsula since 2021. The ground uplift in Svartsengi continues at steady rate, suggesting that magma continues accumulating at a depth of 4-5 km while the eruption is ongoing. On 14 April a small seismic swarm took place NW of Grindavík, all earthquakes were below M1. This seismic swarm is believed to be due to stress changes in the crust due to the repeated ground uplift in the Svartsengi area. No changes in volcanic activity were observed in connection with this seismic swarm. The latest news about the eruption in Sundhnúks are available here: https://en.vedur.is/about-imo/news/one-month-since-the-start-of-the-eruption-at-the-sundhnukur-crater-row"}],"additional_notes":""},{"id":518,"published_at":"2024-04-24T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"Less than 30 earthquakes have been recorded in the area of Askja volcano, all with magnitudes below M1.5. This minor seismicity was mainly located in the eastern part of the caldera, where there is a persistent geothermal field and earthquakes of minor intensity are very common. As planned last week, a team from IMO reached the GPS station OLAC, located near the center of the caldera. The data from this station were showing a fast upward movement, which has been confirmed was due to significant amount of snow which buried the antenna of the instrument. At this stage, it is possible to confirm that there is not a sudden increase in uplift rate in Askja, but rather the ground deformation continues with unchanged trend since September 2023 (as previously reported)."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of M5.4 was recorded in the eastern part of the caldera of Bárðarbunga on 21 April, few aftershocks followed the main event. This earthquake is the largest detected in this region since the end of the eruption in Holuhraun in 2014-2015, when the caldera floor collapsed of about 60 meters. Bárðarbunga volcano is currently inflating and there are indications that the inflation rate has been slightly increased since the past year. It is expected that large earthquakes will occur again along the caldera rim while the volcano is recharging and the caldera floor continues to raise."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Svartsengi: The eruption continues from the single vent which formed just East of Sundhnúkur, in a similar manner since 5 April. Lava continues to extrude and propagate towards the South along open channels, which are clearly visible from the cameras. The lava is also travelling longer distances from the crater through a network of closed tubes, which prevents the lava from cooling by direct contact with the atmosphere. The sector of the lava field which has been propagating towards the South, and reached the protective barriers built East of Grindavík town, has been thickening in the past few days. Estimates of the lava extrusion rate show values between 3-4 m3/s since the beginning of April. The last measurements were made on 15 April, so we are now waiting for new acquisitions which will be available next week, to shed light on the level of the current activity and to understand if there have been any significant changes. The ground uplift measured around the Svartsengi region continues, indicating that magma accumulates at depth at a stable rate and the total inflow to the reservoir is greater than the outflow feeding the eruption. By using analytical models, constrained by both GNSS and InSAR data, it is assessed that between 7-8 million m3 of magma has been recharged to the Svartsengi reservoir since the eruption commenced on 16 March. In previous events, magma started propagating as dike intrusions from the reservoir at 4-5 km depth towards the surface when a threshold of about 8-13 million m3 of recharged magma was reached. As long as the magma continues accumulating in the Svartsengi reservoir, the likelihood for a significant escalation in the eruptive activity in Sundhnúk crater row increases. New eruptive fissures may open in the area between Stóra-Skógfell and Hagafell and/or the current eruptive vent may enlarge because of a sudden increase in magma flow rate, which might reach levels comparable to those observed at the beginning of the past four eruptions which occurred in the area. If this happens, very short precursors, if any, are expected. It is also possible that if more magma starts propagating from the Svartsengi reservoir to the Sundhnúks crater row, this could happen gradually until a balance between the inflow rate at depth and the extrusion rate at the surface is reached. There is also the possibility that a new dike intrusion will result in the opening of additional eruptive fissures in areas other than between Stóra-Skógfell and Hagafell. This scenario is, however, considered less likely than those previously stated, and if this happens, longer and more intense precursors are expected to occur. Reykjanes tip: On Sunday 22 April there was a seismic swarm near the southwestern tip of the Reykjanes peninsula. Around 30 earthquakes were measured and the largest earthquake was M3.1. The swarm lasted for about four hours on Sunday morning."}],"additional_notes":""},{"id":519,"published_at":"2024-05-01T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"About 30 earthquakes were detected in the past week, most under M1. The largest earthquake was a M1.5. This minor seismicity was mainly located in the eastern part of the caldera, where there is a persistent geothermal field and earthquakes of minor intensity are very common."},{"volcano_code":"REY","vona_color_code":"GREEN","vals_level":null,"status_text":"The eruption continues from the single vent which formed just East of Sundhnúkur, in a similar manner since 5 April. Lava continues to extrude and propagate towards the South along open channels, which are clearly visible from the cameras. The lava is also traveling longer distances from the crater through a network of closed tubes, which prevents the lava from cooling by direct contact with the atmosphere. The sector of the lava field which has been propagating towards the South, reached the barrier east of Grindavík and spilled over on April 27, that activity ceased on the same day. The lava tongue moved very slowly and did not present any sever threat for the area. The uplift continues underneath the Svartsengi area, with some indication of a decreasing rate. At the same time volcanic tremor has slightly increased over the past few days. These might be indications that an escalation in the activity might occur soon. On April 30 the Icelandic Institute of Natural History and the LMÍ surveying team flew over the lava field to acquire images for the lava flow rate and volume estimates. The results showed that the flow rates are slowly decreasing. The estimated flow rate between 25 and 30 April showed an average of 0.7 m3/s. By using analytical models, constrained by both GNSS and InSAR data, it is assessed that between 10 million m3 of magma has been recharged to the Svartsengi reservoir since the eruption commenced on 16 March. In previous events, magma started propagating as dike intrusions from the reservoir at 4-5 km depth towards the surface when a threshold of about 8-13 million m3 of recharged magma was reached. As long as the magma continues accumulating in the Svartsengi reservoir, the likelihood for a significant escalation in the eruptive activity in Sundhnúk crater row increases. New eruptive fissures may open in the area between Stóra-Skógfell and Hagafell and/or the current eruptive vent may enlarge because of a sudden increase in magma flow rate, which might reach levels comparable to those observed at the beginning of the past four eruptions which occurred in the area. If this happens, very short precursors, if any, are expected."}],"additional_notes":""},{"id":520,"published_at":"2024-05-08T11:00:00Z","entries":[{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"Around 20 earthquakes have been detected between 3rd and 5th of May near Eldey. The two largest earthquakes occurred on 5 May and were M3.5 and M3.2."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"On 6 May a small seismic swarm was detected near Krýsuvík, the largest earthquake was a M3.3. Nearly 20 earthquakes were detected, there was no further escalation."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption at the Sundhnúk crater row continues. Lava continues to flow a short distance from the active vent, but activity within this crater is decreasing. Over the past week, little to no change has been observed in the southern part of the lava field near the defensive barriers east of Grindavík. Magma accumulation and land rise continue in Svartsengi. The rate has remained consistent in recent weeks. These measurements indicate that pressure continues to rise in the magma chamber. Therefore, a new dike intrusion from the magma chamber beneath Svartsengi towards the Sundhnúk crater row remains possible. Seismic activity has increased steadily in and around the eruption area over the past week. Most of the earthquakes, which are generally smaller than magnitude 1. This gradual increase in seismic activity is likely a sign that stress is being released around the eruption site on the Sundhnúk crater row due to increased pressure in the magma chamber beneath Svartsengi. These are the most likely two scenarios regarding the continuation of activity at the Sundhnúkur crater row: - New eruptive fissures could open in the area between Stóra-Skógafell and Hagafell, and/or the current eruption site could expand due to a sudden increase in lava flow, which may be comparable to the initial phases of the last volcanic eruption in the area. This could occur with very little to no warning. - It is also possible that the flow of magma from the magma chamber beneath Svartsengi into the active vent at the Sundhnúkur crater row may increase steadily until there is equilibrium between the inflow of magma into the chamber and the outflow onto the surface. Signs of a new volcanic eruption would likely include a sudden increase in earthquakes in and around the eruption area, an acceleration in deformation, and pressure changes in nearby boreholes. It is important to understand that warning times could be nonexistent or very short, possibly less than half an hour."}],"additional_notes":""},{"id":521,"published_at":"2024-05-15T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption in Sundhnúks crater row ceased on May 9. Since then the uplift beneath the Svartsengi region continues at a very stable rate and it is now assessed that about 14 million m3 of magma has recharged since 16 March (day of the eruption onset). Over the past weeks the seismicity between Stóra-Skógfell and Grindavík has increased which confirms that the next event (dike propagation and/or eruption) might be very close in time. IMO continues monitoring the area closely. On May 10 a small seismic swarm was detected south of Stóra-Skógfell, in a similar location to where previous eruptions have started. Real-time ground deformation and pressure in boreholes measurements, which would indicate a dike intrusion, did not exhibit significant changes at that time. The activity persisted for a relatively short duration, and it cannot be ruled out that this activity was caused by movement within the crust of a small amount of magma. A new hazard map was issued on 10 May reflecting the reduced hazard for the end of the eruption, but at the same time it accounts for increased likelihood for a next event and can be seen here: https://en.vedur.is/media/uncategorized/Hazard_map_IMO_10may_2024.png"}],"additional_notes":""},{"id":522,"published_at":"2024-05-22T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ground uplift in the Svartsengi region has continued at a stable rate during the last week. It is now assessed that about 17 million m3 of magma has recharged since 16 March (day of last eruption onset). Seismicity between Mt. Stóra-Skógfell and Grindavík continues and between 40 and 80 earthquakes have been detected per day last week. All earthquakes detected were below M2.0. Since yesterday morning minor fluctuations in pressure at depth in boreholes in the Svartsengi region have been detected. Greater pressure increase in the boreholes has previously been a short term (approx. 30 min) precursor to a dike propagation and/or eruption. Causes of the minor pressure fluctuations that have been observed are unknown but might indicate some changes in magma storing zone. It is still assumed that the next event (dike propagation and/or eruption) might be close in time. Based on current geophysical data and recent geodetic modelling results, the Sundhnúk area continues to be the most likely place where the next eruption could take place. IMO continues to monitor the area closely. A new hazard map was issued on 21 May. It accounts for increased likelihood for a next event and can be seen here: https://en.vedur.is/media/uncategorized/Hazard_map_IMO_21may_2024.png"}],"additional_notes":""},{"id":523,"published_at":"2024-05-29T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ground uplift in the Svartsengi region has continued at a stable rate during the last week. It is now assessed that about 20 million m3 of magma has recharged since 16 March (day of last eruption onset). Seismicity between Mt. Stóra-Skógfell and Grindavík continues and between 60 - 100 earthquakes have been detected per day last week and has increased slightly in the past days. All earthquakes detected were below M2.5, the largest was a M2.2 on May 24. It is still assumed that the next event (dike propagation and/or eruption) might be close in time. Based on current geophysical data and recent geodetic modelling results, the Sundhnúk area continues to be the most likely place where the next eruption could take place. IMO continues to monitor the area closely. A new hazard map was issued on 28 May. It accounts for a high likelihood for a next event and can be seen here: https://www.vedur.is/media/uncategorized/Haettusvaedi_VI_28mai_2024.png"}],"additional_notes":""},{"id":524,"published_at":"2024-06-05T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"On 29 May an intense seismic swarm began at 10:40 UTC between Stóra-Skógfell and Hagafell on the Sundhnúkur crater row, resulting in a volcanic eruption at 12:46. About 2.4 km long fissure opened up and the extrusion rate at the start of the eruption was estimated at 1.500 m3/s. The gas plume is estimated to have reached about 3.5 km height. Shortly before 16:00 UTC, steam explosions began when the magma came into contact with groundwater where the lava flowed into a fissure by Hagafell. The magma caused the water to quickly convert into steam, causing explosions and tephra fall (ash). This activity was intermittently detected on the first and second day of the eruption but has not been detected since then. The intensity of the eruption slowed down by the days and today only one crater remains active which is the same crater that was active for the longest part of the March-May eruption 2024. Gas and Vog (Volcanic smog) have been detected across the country. It is estimated that about 15 million m3 of lava were extruded from the Svartsengi reservoir in the first few hours of the eruption. Latest measurements indicate that the land continues to subside at Svartsengi. When the dike propagation began in the lead-up to the current eruption on May 29, the land subsided by 15 cm at Svartsengi. However, it has since subsided an additional 4-6 cm in the following days. The prolonged land subsidence after the eruption's onset is unlike what has been observed in previous eruptions at the Sundhnúkur Crater Row. Ongoing deformation measurements in the Svartsengi area and the evolution of volcanic activity in the coming days will provide a clearer picture of the continued magma accumulation beneath Svartsengi. However, numerical modeling and lava discharge assessments of the eruption indicate that magma accumulation persists, as it has in previous eruptions. The lava flows extend over Gríndavík road and Nesvegur road and spread widely. However today, the most active front is to the south and northwest from the crater, accumulating in lava ponds which are then flowing towards Sýlingafell and north of it. A total of about 500 earthquakes were detected in this seismic swarm, however following the eruption there is hardly any seismic activity in the area. More information on the eruption and the Reykjanes system can be found here: https://en.vedur.is/about-imo/news/volcanic-unrest-grindavik https://icelandicvolcanoes.is/?volcano=REY"}],"additional_notes":""},{"id":525,"published_at":"2024-06-12T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The ground deformation in Askja continues as showed by continuous GPS measurements, no change in trend is observed since September 2023. The level of seismicity has been stable and considered within background level between recent months."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"GPS measurements and InSAR images confirm that inflation at Bárðarbunga continues. As reported previously, a change in deformation rate was observed in early 2022 when the rate slightly increased. The rate is unchanged since then. The seismicity in the area has been very low for the past few weeks."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismicity continues to be within the normal background level."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption at the Sundhnúkur crater row that started 14 days ago remains stable. One crater is active which is the same crater that was active the longest in the March-May eruption. The activity has been similar in the last few days. Seismicity has been very low in the last week, only a few earthquakes have been detected. On June 8 the lava flow north of Sýlingarfell flowed towards the west and crossed over Gríndavíkurvegur. The gap in the defensive barriers that shield the Blue Lagoon and Svartsengi Power plant was closed to divert the lava flow. The lava flowed slightly over the barrier that day. The lava tongue still progresses very slowly towards the northwest along a similar channel as the one that flowed over Grindavík road on Saturday. However, this current active lava flow front is still a few hundred meters away from the road. Lava is still accumulating in a lava pond just southeast of Sýlingarfell and could burst again and trigger another fast lava propagating front in the next few days. Newest GPS measurements show that uplift resumed last weekend and the subsidence that was detected in the first days of the eruption has stopped. The rate of uplift cannot be estimated yet, but it can be assumed that the inflow of magma into the magma reservoir has exceeded the outflow from the crater. Yesterday (11 June) an intense VOG (Volcanic smog) event affected the Reykjanes peninsula and the Reykjavík Capital area. Concentration of SO2 at the ground reached 700 microgram/m3 in inhabited regions and high level of PM1 and PM2.5 required the issuance of recommendations to avoid outdoor activities to prevent health issues. More information on the eruption and the Reykjanes system can be found here: https://en.vedur.is/about-imo/news/volcanic-unrest-grindavik https://icelandicvolcanoes.is/?volcano=REY Additionally A long-term monitoring meeting was held this morning to check and review the activity in the all country."}],"additional_notes":""},{"id":526,"published_at":"2024-06-19T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"Ongoing volcanic activity since May 29. The Icelandic Institute of Natural History (IINH) and the National Land Survey of Iceland (NLSI) have processed data collected by experts from Efla, Verkís and Svarmi from drone flights over the eruption site on 10 June. The data shows that the lava flow field has reached 9.2 km2 and a volume of about 41 million m3. This makes the lava field formed in this eruption the largest of the five eruptions that have occurred in the Sundhnúkur crater row area since December 2023, both in terms of area and volume. Based on this data, the average flow of lava from the eruption during the period 3-10 June is estimated at 10 m3/s. The flow has remained stable since than so it is estimated that the extrusion rate still remains 10 m3/s. Only one crater remains active and lava from it is collecting in ponds South and NW of the crater. Most of the lava is slowly moving to the NW towards Sýlingarfell and then moving to the west of it. Yesterday 18 June a small outbreak occurred where lava flowed over the defensive barrier east of Svartsengi, due to a digger breaking the hardened lava-front, whilst making the protective barrier larger. The magma was sprayed with water for a few hours in an attempt to cool it down and to prevent the flow of lava from going further, as was done in the Heimaeyjar eruption in 1973. The outbreak is still active but diggers are working on making the barrier larger. Volcanic smog has been detected in the past two days on the Reykjanes peninsula. Uplift continues under Svartsengi and Geodetic modeling shows that the inflation of the magma reservoir beneath Svartsengi, results from an additional volume increase in the range of 1-2 m³/s. The seismicity in the area continues to be very low since the onset of the eruption. IMO closely monitors the area. More information on the eruption and the Reykjanes system can be found here: https://en.vedur.is/about-imo/news/volcanic-unrest-grindavik https://icelandicvolcanoes.is/?volcano=REY"}],"additional_notes":""},{"id":527,"published_at":"2024-06-26T11:00:00Z","entries":[{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":null,"status_text":"A M3.1 earthquake was detected on 23 June, a few small aftershocks followed without further escalation."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"A M3.3 earthquake was detected on 19 June without further escalation."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The eruption in Sundhnúks crater row was declared over on 22 June. No major progression has been detected in the lava field since that day, however localized lava movements continued in the following days. One June 23 - 24 the lava fronts which reached west of Sýlingarfell kept progressing further to the west and over the defensive barriers. A huge work has been done trying to limit the progression of lava flow towards the Svartsengi power plant by enlarging and building new barriers as well as by cooling down the lava front with water. Ground deformation data indicates that uplift in the Svartsengi region continues, though at a slightly lower rate, with potential for new dike events and/or a new eruption in the coming weeks. The seismicity in the area continues to be very low. IMO closely monitors the area. A new hazard map was published on June 24. More information here: https://www.vedur.is/media/uncategorized/Haettusvaedi_VI_24juni_2024.png https://en.vedur.is/about-imo/news/volcanic-unrest-grindavik https://icelandicvolcanoes.is/?volcano=REY"}],"additional_notes":""},{"id":528,"published_at":"2024-07-03T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The level of seismicity has been very low in the past week. The ground deformation continues in the area, even if at lower rate since September 2023."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of intensity M3.4 has been recorded on 30 June on the northern edge of the caldera rim. Few aftershocks followed it without further escalation."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":null,"status_text":"A small seismic swarm started this morning (03 July) and it is ongoing. The largest earthquake detected so far had a magnitude of M3.3. Seismic swarms and earthquakes of this sizes are not infrequent, and they mostly occur in the vicinity of the geothermal area which is present in the central part of the volcanic system."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Since the end of the eruption on 22 June, deformation data indicates that magma continues accumulating at depth beneath the Svartsengi region. Based on geodetic modelling, the current magma recharge rate is estimated to be 4-6 m3/s. During the diking event on 29 May and the first week of the eruption, the estimated volume drop from the reservoir was between 13-19 million m3. Current modelling results indicate that this total volume loss will be recharged to the Svartsengi reservoir within the next 3 to 6 weeks. As of today, this is the likely time frame for the next diking event and/or eruption. A new hazard map has been published by the IMO. Hazards associated with lava flow and gas pollution have been lowered in many zones. The overall assessment is unchanged except in two zones. The level of hazards within Zone 3 goes from high (red) to considerable (orange), and within zone 5, from considerable (orange) to moderate (yellow)."}],"additional_notes":""},{"id":529,"published_at":"2024-07-10T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The level of seismicity has been very low in the past week. The ground deformation continues in the area, even if at lower rate since September 2023. Estimated uplift in the past year is about 10 cm. On August 6-11 a team of technicians will go to Askja to do leveling and GPS measurements. The lake is now free of ice, however there is still snow in the caldera."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity in the past month has been low however larger earthquakes (M3) have been occurring every now and then."},{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":null,"status_text":"A small seismic swarm was detected on Lambafell on 5 July with a total of 65 earthquakes, largest was a M3.1. Similar swarms in the area have occurred in the past and are not infrequent."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismicity remains within background levels since past 4 months."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Last week increased sulfur smell was detected in Markarfljót and Sólheimajökull and increase in water level. This activity is typical for the summer time."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Geodetic modelling has been used to estimate the magma inflow rate into the Svartsengi reservoir during periods with no eruptions. In these periods the system is considered “closed” and, as such, the analysis does not account for additional magma inflow that occurs when the system is open during eruptive periods (e.g. the volume of magma that flows through the system and is extruded as lava during eruptions). Data shows inflow rates between 8 and 10 m3/s until the first eruption in December 2023. Following this, the model indicates that the magma inflow rate at depth has typically been in the region of 4 to 6 m3/s, when accounting for the uncertainties in the results. Considering the uncertainty in the model, the inflow rates since mid-January have been relatively stable. As of today, the inflow rate is assessed to be in line with what has been observed since mid-January with no evidence of a declining trend. Combined analysis of erupted volumes and volume changes within the Svartsengi volcanic system indicates that the overall magma availability is in fact higher. During the diking event on 29 May and the first week of the eruption, the estimated volume drop from the reservoir was -13-19 million m3. Current modeling results indicate that this total volume loss will be recharged to the Svartsengi reservoir within the next 3 to 6 weeks. As of today, this is the likely time frame for the next diking event and/or eruption. A new hazard map has been published by VÍ. Hazards associated with lava flow have been lowered in zone 1 from considerable (orange) to moderate (yellow). Hazards associated with lava flows are also estimated lower in zone 6. The overall assessment is unchanged except in the two zones. Two earthquakes were detected over M3 on the Reykjanes ridge without further escalation. The larger was a M3.4 detected on 5 July. Additionally Today the long term monitoring meeting took place and the Volcano Weekly report today includes the outcomes from the meeting."}],"additional_notes":""},{"id":530,"published_at":"2024-07-17T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"About 30 earthquakes were detected in the area around Askja in the past week. The largest one with a magnitude of M2.3 occurred on 13 July, NW of the caldera. Minor seismicity has been also detected on the Eastern part of the caldera rim, where geothermal activity is well known and persistently present. This level of seismic activity is considered normal. The latest GPS data confirm the deformation in the area which continues at stable rate since September 2023."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Very minor seismicity has been detected in the past week."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Few earthquakes have been detected in the past week. The largest had magnitude of M 2.2 on 14 July on the eastern side of the caldera rim."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Minor seismic activity has been detected in proximity of cauldrons located in the NE part of the caldera. This activity is considered normal for the summer time."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"As of today, the estimated magma recharge to the Svartsengi reservoir has reached the lower limit of what was lost during the 29 May diking event and first week of the eruption. The lower limit is around 13 million cubic meters and the upper limit 19 million cubic meters of magma. Assuming a similar volume of magma needs to be recharged to build up enough pressure in the system to trigger the next event (dike and/or eruption), geodetic modelling indicates that there is a very high probability that this will occur within the next three weeks. If, however, a higher volume change is required (similar to that reached prior to the 29 May event, ~ 20 million m3) then this will be achieved within the next three to four weeks. This is based on the assumption that the inflow rate of magma from depth remains constant as of today. Recent data analysis of the temporal evolution of fissure openings for previous Sundhnúks eruptions indicates a systematic southwest migration. Considering this data and the considerable amount of fault movement within Grindavík since November 2023, the likelihood of lava extrusion in Zone 4 is now considered higher for future eruptions. Therefore, the likelihood of occurrence for fissure openings, lava flows and gas pollution has been raised to medium in Zone 4, in line with the assessment of these hazards in Zone 3. This change does not currently affect the overall hazard level in Zone 4, which remains considerable (orange). https://en.vedur.is/volcanoes/fagradalsfjall-eruption/hazard-map/"}],"additional_notes":""},{"id":531,"published_at":"2024-07-24T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Some increased activity was in the caldera the past week with about 60 earthquakes, the largest was M2.5 on 17th of July. Some increased H2S and CO2 was measured on the 20th of July. This is connected to geothermal activity."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The last week the seismicity in the Sundhnúks crater row has been relatively low, although slowly increasing. Ground deformation continues, and magma accumulation under Svartsengi has persisted at a steady rate in recent weeks. Based on the volume loss observed during diking on 29 May, and continued subsidence during the first week of the May-June eruption, it is estimated that a volume between 13 to 19 million cubic meters needs to be recharged before the next event is triggered. According to model calculations, the total recharge volume is likely to approach 16 million cubic meters in the coming days. There is some uncertainty in these calculations, but a new magma intrusion and an eruption is considered highly probable within the next two to three weeks, provided the magma inflow rate to the Svartsengi reservoir remains stable. The Icelandic Meteorological Office has updated the scenarios considered most likely if an eruption occurs. Both scenarios are considered equally likely, and they assume that the initial intensity of the next eruption will be similar to the eruption in May-June 2024. Scenario 1 - Eruption between Stóra-Skógfell and Sundhnúkur (central part of zone 3 on the hazard assessment map). Similar location to eruptions that began on 18 December 2023, 8 February, 16 March, and 29 May 2024. - The likely precursor is a localized earthquake swarm between Stóra-Skógfell and Sýlingarfell, acceleration in deformation, and pressure changes in boreholes in the area. - Very short pre-eruption warning time (less than 30 minutes). - Lava could reach Grindavíkurvegur near Þorbjörn within 1.5 hours and Grindavíkurvegur near Svartsengi within 3 hours. Scenario 2 - Eruption south of Sundhnúkur, near Hagafell, and extending south towards and potentially within northern Grindavík (southern part of zone 3 on the hazard assessment map and the northern part of zone 4). Similar location to the eruption that began on 14 January 2024. - The likely precursor is an earthquake swarm starting near Stóra-Skógfell or Sýlingarfell and moving south, acceleration in deformation, and pressure changes in boreholes in the area. - The warning interval for an eruption in this area would probably be longer than in scenario 1, but it is uncertain by how much. The length of the warning period depends on how far south the magma must break a pathway to the surface. - Lava could reach Nesvegur and Suðurstrandarvegur within 1.5 hours. Lava flows could potentially close escape routes on land within about 6 hours. - In this scenario, lava could reach the sea east of Grindavík within 1.5 to 3 hours. If lava reaches the sea, it could cause localized hazards due to rapid cooling of the lava. Initially, there would be a hazard due to ash and gas formation, primarily hydrochloric acid (HCl). Within a radius of about 500 meters from where the lava enters the sea, conditions would be life-threatening. - A magma intrusion that reaches south of Hagafell will likely cause significant fault movements in Grindavík. - There is a possibility that lava could erupt within Grindavík. One scenario is that lava erupting from a vent north of the protective barriers at Grindavík could flow into existing fissures and then re-emerge again within the town limits. Another scenario is the possibility of an eruptive fissure opening within Grindavík. However, in such a situation, it is likely that a fissure would first open north of the town before opening within the town limits. The hazard assessment has been updated considering the likelihood of a new magma intrusion and an eruption in the coming weeks. The hazard level has been raised in all areas except in zone 7. The hazard assessment is valid until 30 July, unless conditions change. https://en.vedur.is/about-imo/news/volcanic-unrest-grindavik"},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The level of seismicity has been rather low in the past week or about 18 earthquakes. Deformation continues at a stable rate in the area, though at a lower rate since September 2023. The lake is free of ice and little to no snow in the caldera."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Very minor seismicity has been detected in the past week."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Very minor seismicity has been detected in the past week and it has remained within background levels for months."}],"additional_notes":""},{"id":532,"published_at":"2024-07-31T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"The level of seismicity is similar to last week, about 18 earthquakes were detected. Deformation continues at a stable rate in the area, though at a lower rate since September 2023. The lake is free of ice and little to no snow in the caldera."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"Very minor seismicity has been detected in the past week and it has remained within background levels for months."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"On 27 July a Jökulhlaup (glacial outburst flood) started in Mýrdalsjökull, in the river Skálm from cauldrons 13 and 14, the flood reached about 1000 m3/s and occurred on the eastern side of Mýrdalsjökull. The cause of the flood is long-term geothermal activity beneath Mýrdalsjökull and not due to a volcanic activity. As a precaution, the colour code was temporarily increased to yellow to take into account the heightened possibility of volcanic unrest. The conductivity and tremor rose while the flood was ongoing, seismicity was also detected. A total of 50 earthquakes were detected, the largest a M2.9. The colour code was changed back to green on 29 July when the activity returned to usual back-ground activity. The size of the flood was similar to the flood in 2011 and 1955 in Múlakvísl. Outburst floods from Mýrdalsjökull often occur during the summer months, especially July. However, flood was larger than usual, hence in the increased response. The colour code was changed to yellow on 27 July and moved back to green on 29 July when the activity has reduced to normal background activity."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Model calculations of volume change suggest that enough magma has been recharged to the Svartsengi reservoir to trigger a new event, with an increased likelihood of this occurring within the next 7-10 days. Geodetic measurements show that the rate of uplift has decreased slightly during the past few days. Over the past 2 weeks, the number of earthquakes per day has been increasing. On 29 July an increased microseismicity was detected within the Sundhnúkur crater row. The activity lasted for about 50 minutes and suggests that pressure within the system is increasing. This development coinciding with the earthquake activity measured on 29 July in the Sundhnúkur crater row may be an indicator that a dike propagation and volcanic eruption is nearing. The hazard assessment remains the same as last week and is valid until 6 August, unless conditions change. https://en.vedur.is/media/uncategorized/Hazard_map_IMO_30july_2024.png"}],"additional_notes":""},{"id":533,"published_at":"2024-08-07T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"No further actvity since the flood was over on 29 July. Seismicity has returned back to normal background-level."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The number of earthquakes per day detected on the Sundhnúkur crater row and the surrounding area continues to gradually increase. About 60 earthquakes were detected in the last 24 hours. In comparison, the number of earthquakes just over a week ago was about 30 earthquakes on average per day. The development of land uplift and magma accumulation beneath Svartsengi has remained similar for the past few days. The land uplift continues to decrease at a slow rate. That, together with increased earthquake activity indicates that pressure in the system is increasing. According to model calculations, the estimated amount of magma in the magma reservoir beneath Svartsengi is comparable to what it was prior to the onset of the eruption that started at the end of May. Therefore there is continued increased probability of another dyke propagation and another volcanic eruption The hazard assessment remains the same as last week and is valid until 13 August, unless conditions change. https://en.vedur.is/media/uncategorized/Hazard_map_IMO_06august_2024.png"}],"additional_notes":""},{"id":534,"published_at":"2024-08-14T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"A team of scientists visited Askja volcano for the annual campaign measurements. The results from pH and temperature measurements in Víti lake show similar results as last year, pH ranges between 2.5-2.8 and temperature between 23-28°C. Gas measurements were also done with MultiGas instrument and are currently being processed. Ground deformation data (Insar, campaign and continuous GNSS) confirm that the inflation continues at stable rate since September 2023. Seismicity remains at a background level."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"The ground deformation continues at stable rate, and the seismicity continues to be at a background level."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismicity for the past month is well within the known background level."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":null,"status_text":"A short-lived seismic swarm occurred on the 10 August with about 40 earthquakes occurring in the area of Grjótavatn, the largest event had a magnitude of M2.2. Swarms in this area have been occurring regularly since 2021 and are interpreted as tectonic related events. There are currently no evidences of ongoing ground deformation in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Deformation signals and seismic activity show similar patterns as prior to the last eruption on the Sundhnúkur crater row. Model calculations also suggest that the volume of magma beneath Svartsengi is now estimated to be greater than it was prior to the last eruption, which started on 29 May. Prior to the last eruption onset, land uplift and magma accumulation continued for two weeks after the prior volume was reached until an eruption started. It can thus be assumed that magma propagation and a volcanic eruption can start at any time, but based on previous occurrences it might get delayed. Seismic activity in the area has increased in recent weeks and the development of it is similar as before the previous dike propagations and volcanic eruptions. The activity over the last seven days has been similar between days, with about 60-80 earthquakes detected per day in the area between Stóra-Skógfell to Grindavík. Most of the earthquakes are at depths between 2-4 km, the shallowest in the area between Stóra-Skógfell and Sýlingarfell. Deformation data suggest that land uplift is ongoing but at slower rate. That indicates that magma pressure is increasing beneath Svartsengi. Model calculations estimate that over 20 million cubic metres of magma have been added to the magma reservoir beneath Svartsengi since the last eruption. The hazard assessment remains the same as last week and is valid until 20 August, unless conditions change. https://www.vedur.is/media/uncategorized/Haettusvaedi_VI_13agust_2024.png Additionally Today the long term monitoring meeting took place and the Volcano Weekly report today includes the outcomes from the meeting."}],"additional_notes":""},{"id":535,"published_at":"2024-08-21T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"About 50 earthquakes occurred in the area of Bárðarbunga caldera in the past week. The largest had a magnitude of M3.5 and occurred on 16 August. Two short lived seismic swarms occurred in the area 14 km ESE from Bárðarbunga caldera in the last 24 hours. This area is characterized by deep seismicity and it has been very active since the end of the eruption in 2015 with frequent swarms. More than 20 earthquakes were detected at a depth of about 15 km."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake with magnitude M3.0 was detected on 16 August. Few small events followed."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":null,"status_text":"More than 40 earthquakes were detected in the area of Grjótárvatn in the past week. Seismic swarms have been common since 2021 in this area. No deformation is associated with the ongoing seismic activity and this activity is interpreted as due to intraplate tectonic processes."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seismic activity around the Sundhnúkar Crater Row continues to exhibit behavior similar to that observed in the days leading up to the most recent eruption, which began on May 29. Few earthquakes with magnitudes above 2 were recorded in the past days. The seismic activity suggests that pressure continues to build in the area due to magma accumulation under Svartsengi. The progression of magma accumulation and land uplift has remained unchanged in recent days. Geodetic model calculations show that the total volume of magma beneath Svartsengi is now greater than it was before the previous events. The likelihood of a new magma intrusion and perhaps an eruption in the Sundhnúkar Crater Row remains high. The hazard assessment is unchanged from the past week and the hazard map is accessible here: https://en.vedur.is/volcanoes/fagradalsfjall-eruption/hazard-map/"}],"additional_notes":""},{"id":536,"published_at":"2024-08-28T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"On 22 August an intense seismic swarm began at 20:48 UTC, boreholes showed increased pressure as well and at 21:26 an eruption began on multiple fissures east of Sýlingarfell. The fissures reach from east of Sundhnúkur and to about 2-3 km northeast of Stóra-Skógfell. The eruption is located much further to the north than past eruptions. All data suggest that this eruption is the largest in the area since the unrest period began in the autumn of 2023. This assumption is based on measurements of the lava field so far and model calculations that estimate the amount of magma that propagated from Svartsengi to the Sundhnúkur crater row when the eruption started. Estimated extrusion rate at the beginning of the eruption is about 1.500-2.000 m3/s but is now significantly less, several tens of cubic meters per second. The activity has now confined itself somewhat in one area in the northern part of the fissure that opened in the evening of 22 August, about 2-3 km northeast of Stóra-Skógfell. The lava now flows mostly to the northwest in two main streams and its progress has slowed down considerably. It does not threaten any infrastructure at the moment. Air quality in the peninsula has been heavily affected by volcanic emissions as well as by the smoke which originates from burning moss while lava flows advance. Very preliminary estimates of SO2 flux (from DOAS traverse) indicate values between 200-600 kg/s. Seismicity remains low and comparable to previous seismicity during volcanic episodes in the area. Real time GNSS observations indicate subsidence of about 40 cm since the beginning of the eruption in the Svartsengi area. The subsidence continues but at a decreasing rate day by day. A new hazard map was issued on 26 August and is valid until 29 August. https://en.vedur.is/volcanoes/fagradalsfjall-eruption/hazard-map/ More information can be found here https://en.vedur.is/about-imo/news/volcanic-unrest-grindavik"}],"additional_notes":""},{"id":537,"published_at":"2024-09-04T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"On September 3 an earthquake with intensity M5 occurred in the eastern part of the caldera without further escalation. Large earthquakes are not rare in Bárðarbunga. The largest earthquake detected this year occurred on 21 April and it had a magnitude M5.4. A GNSS field campaign is currently ongoing at Bárðarbunga and the results will be reported when they are available."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption north east of Mt. Stóra-Skógfell continues. The activity has singled to two active craters and the extrusion rate is estimated to be about 5 m3/s. The active lava fronts are propagating to the north east, west and east of the craters. They are however progressing very slowly and do not threaten any infrastructure. Geodetic modelling data show that the magma inflow to the system underneath Svartsengi is now equal to the outflow feeding the eruption (as previously observed in the past eruptions). The seismicity has slowed down considerably in the past week. The hazard assessment has been updated and is now valid until 5 September. Zones 3, 5 and 6 were extended in their size towards the NE. This was needed to account for the location of the current activity which is occurring further to the north-east than the previous eruptions. General information about Reykjanes can be found here https://icelandicvolcanoes.is/?volcano=REY Hazard map: https://www.vedur.is/media/uncategorized/Haettusvaedi_VI_3sept_2024.png"}],"additional_notes":""},{"id":538,"published_at":"2024-09-11T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"This week a minor glacial flood occurred in the river Skálm that comes from the eastern side of Mýrdalsjökull. The flood originated in a geothermal area underneath Mýrdalsjökull ice-cap. A larger glacial flood occurred in the area on 27 of July and this is the second minor flood following that flood. A M3.0 earthquake, likely associated with the flood, occurred on 6th of September."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Given the absence of visible activity at the craters since the evening of 5 September, the eruption which commenced on 22 August was declared over on 6th September. GPS and InSAR data indicate that ground uplift has started in the Svartsengi region. This suggests that magma is accumulating again within the magma body at 4-5 km depth. While magma accumulation continues beneath Svartsengi, magma propagation and even a volcanic eruption can be expected in the Sundhnúkur crater row. It is too soon to predict whether or when the next event might occur. The lava flow front, emplaced during the last eruption, is still active even though the eruption is over. The lava can be expected to continue creeping forward over the next few days. The lava field is still unstable and prone to collapses. The eruption site is therefore dangerous to access. On 6th September, the aviation color code was moved back to yellow reflecting the decreased level of activity. An updated hazard maps has been also published on 10 September: https://www.vedur.is/media/uncategorized/Haettusvaedi_VI_10sept_2024_2.png"}],"additional_notes":""},{"id":539,"published_at":"2024-09-18T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The ground uplift in the Svartsengi region continues at a steady rate. The level of seismicity remains very low. As long as the ground uplift continues, reflecting an accumulation of magma at depth, an eruption and/or dike propagation are likely to occur in the next months. The latest hazard map is accessible here: https://en.vedur.is/media/uncategorized/Hazard_map_IMO_17sept_2024.png"}],"additional_notes":""},{"id":540,"published_at":"2024-09-25T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The ground uplift in the Svartsengi region continues at a steady rate. The level of seismicity remains very low. As long as the ground uplift continues, reflecting an accumulation of magma at depth, an eruption and/or dike propagation is likely to occur in the next months. The latest hazard map is accessible here: https://en.vedur.is/media/uncategorized/Hazard_map_IMO_17sept_2024.png"}],"additional_notes":""},{"id":541,"published_at":"2024-10-02T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake with intensity M3.2 was recorded on the NE part of the caldera rim on 1 October. No further escalation was detected."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"Small floods associated with geothermal water leakages from few cauldrons in the NE of the caldera have been occurring in the past weeks. On 30 September an earthquake with magnitude M3.6 was recorded in the northern part of the caldera. Seismic activity, even characterized by large events, may be triggered and associated with adjustments occurring at those cauldrons which are emptying. No other unusual geophysical parameters are observed."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":null,"status_text":"On 29 September two earthquakes above M3 occurred in Trölladyngja and aftershocks continued for a couple of days. Seismic swarms in this area occurred often since the unrest started in the Reykjanes peninsula. For the time being there are no indications of ground deformation in this area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Few and small earthquakes have been detected in the area of the dike in the past week. However, GNSS and InSAR data show that the ground deformation continues in the Svartsengi area suggesting that magma continues accumulating at depth at pretty stable rate. As long as magma continues accumulating, a new dike formation and/or an eruption are likely outcomes."}],"additional_notes":""},{"id":542,"published_at":"2024-10-09T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"Three earthquakes with magnitude above M3 occurred on the rim of Bárðarbunga caldera. The largest had a magnitude M5.2 and it occurred on 6 October in the northern part of the caldera, whereas two earthquakes with magnitude M3.7 and M3.9, respectively, occurred the day before on the southern part of it. Such large earthquakes are not unusual for Bárðarbunga and they look similar to those which characterized the seismic activity in the period 1996-2014 (prior the eruption in Holuhraun). This suggest that these large earthquakes are likely due to movement along the caldera floor which is slowly moving upwards again since new magma is feeding the deep system."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Very little seismicity is occurring in the area of the unrest nearby Sundhnúks crater row. However, deformation data shows that the ground uplift continues in the Svartsengi region, indicative of continued magma inflow into the Svartsengi reservoir. Recent GNSS data may indicate a slight change in the rate of the uplift which has been slowly reducing over the past few days. The forecast for the likely timing of the next possible dike propagation and/or eruption will be assessed based on current deformation data."}],"additional_notes":""},{"id":543,"published_at":"2024-10-16T11:00:00Z","entries":[{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"On 14 October a M3 was detected without further escalation."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Minor seismicity is occurring in the area of the unrest nearby the Sundhnúkur crater row. However, deformation data shows that the ground uplift continues in the Svartsengi region, indicative of continued magma inflow into the Svartsengi reservoir. Last week a minor reduction in the rate of uplift was reported. Uplift has been rather constant during the last week and no further reduction observed."}],"additional_notes":""},{"id":544,"published_at":"2024-10-23T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"GPS measurements and model calculations in the Svartsengi area show that ground uplift and magma accumulation continue. Model calculations based on GPS data indicate that the volume of magma that has accumulated beneath Svartsengi is now approximately two-thirds of what it was before the previous eruption, which began on August 22. If the current rate of magma accumulation in the reservoir continues, the lower uncertainty threshold for the volume of magma that might culminate in a dike intrusion or eruption will be reached in early November. The volume of magma that has accumulated beneath Svartsengi since the last eruption ended is estimated to be 14 million cubic meters, according to model calculations. It is estimated that around 24 million cubic meters of magma exited the magma chamber during the last eruption, which began on August 22 and was the largest eruption in this sequence of events. The uncertainty in these calculations is approximately +/- 5 million cubic meters. The volume of magma beneath Svartsengi is therefore projected to reach a value that is comparable to what it was before the last eruption when it enters within the range defined by the \"lower uncertainty limit\" (19 million cubic meters) and the \"upper uncertainty limit\" (29 million cubic meters). The closure of the town of Grindavík has been released and access to the town is unrestricted as of October 21. However, open areas in the town and its vicinity are dangerous and have not been specifically examined. Hiking in open areas around town is not recommended as within the town and in its surroundings there are open fissures and faults. Children should not enter the area. Tourists, residents, employees and others enter the area at their own risk (see https://www.logreglan.is/frettatilkynning-til-fjolmidla-34/ for further information). Hazard map is valid until October 29 (given no changes in activity). More information here: https://www.vedur.is/media/uncategorized/Haettusvaedi_VI_17okt_2024.png"}],"additional_notes":""},{"id":545,"published_at":"2024-10-30T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Ground uplift and magma accumulation in the Svartsengi region continue at stable rate. Seismic activity around the Sundhnúks crater row remains very low, with only a few small earthquakes detected per day in recent weeks. IMO has recently estimated how much magma must be recharged below Svartsengi to likely trigger the next event. The estimate has been updated since last week based on new geodetic model calculations based on GPS measurements and satellite data. Based on this new estimate of the magma volume, it can be assessed that the likelihood of a new dike and/or an eruption will increase by the end of November. This assessed timeline is dependent on the deformation data available at any given time. If the magma inflow rate beneath Svartsengi changes, this assessment will change accordingly. According to the last two eruptions in Sundhnúks crater row, seismic activity in the area northwest of Grindavík increased few weeks before the eruptions started. It is believed that this seismic activity reflects the pressure increased in the magma body underneath Svartsengi and, as such, its onset can be considered as an important precursor of the next event. If seismic activity will start to be detected in this specific region by end of November, it can be assumed that the likelihood of a new dike and/or a volcanic eruption increases. It is possible that the likelihood of a volcanic eruption is considered high for several weeks before a dike and/or a volcanic eruption begins. The closure of the town of Grindavík has been released and access to the town is unrestricted as of October 21. However, open areas in the town and its vicinity are dangerous and have not been specifically examined. Hiking in open areas around town is not recommended as within the town and in its surroundings there are open fissures and faults. Children should not enter the area. Tourists, residents, employees and others enter the area at their own risk (see https://www.logreglan.is/frettatilkynning-til-fjolmidla-34/ for further information). Hazard map is valid until November 12 (given no changes in activity). More information here: https://www.vedur.is/media/uncategorized/Haettusvaedi_VI_29okt_2024.png"}],"additional_notes":""},{"id":546,"published_at":"2024-11-06T11:00:00Z","entries":[{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":null,"status_text":"On November 2 a M3 earthquake was detected without further escalation."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"On November 4 a small seismic swarm occurred on the Sundhnúks crater row where about 20 earthquakes were detected between 2 am - 3 am. A possible explanation for this seismicity is magma movement in the crust which halted without further progression. No signs of deformation or pressure changes were seen on GPS, fiber optics or in HS-Orka's boreholes at the time of the seismic swarm. There are no signs of changes in the magma accumulation and ground uplift rates in the Svartsengi region following the event. Seismic activity around the Sundhnúks crater row has returned to its normal background level since the night of November 4. The current level of recharged magma volume, estimated via geodetic models, still indicates that the likelihood of a new dike and/or an eruption will increase by the end of November. This assessed timeline is dependent on the deformation data available at any given time. If the magma inflow rate beneath Svartsengi changes, this assessment will change accordingly. However, before declaring an increased likelihood for the next event in the area, the seismicity in the NW of Grindavík town is expected to increase. It is believed that this seismic activity reflects the pressure increased in the magma body underneath Svartsengi and, as such, its onset can be considered as an important precursor of the next event. If seismic activity will start to be detected in this specific region by end of November, it can be assumed that the likelihood of a new dike and/or a volcanic eruption increases. It is possible that the likelihood of a volcanic eruption is considered high for several weeks before a dike and/or a volcanic eruption begins. The closure of the town of Grindavík has been released and access to the town is unrestricted as of October 21. However, open areas in the town and its vicinity are dangerous and have not been specifically examined. Hiking in open areas around town is not recommended as within the town and in its surroundings there are open fissures and faults. Children should not enter the area. Tourists, residents, employees and others enter the area at their own risk (see https://www.logreglan.is/frettatilkynning-til-fjolmidla-34/ for further information). Hazard map is valid until November 12 (given no changes in activity). More information here: https://www.vedur.is/media/uncategorized/Haettusvaedi_VI_29okt_2024.png"}],"additional_notes":""},{"id":547,"published_at":"2024-11-13T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":null,"status_text":"Seismic activity continues to be higher than background in the Grjótarvatn area. The seismicity has shown an increasing trend since June 2021. As of today no other monitored geophysical parameters indicate significant changes. However, to improve the monitoring in the area a seismic and a GPS stations have been installed in the area in the past months. This will allow to have a better understanding of the ongoing process."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"An earthquake of magnitude M3 was detected on the eastern side of the Askja caldera rim on 10 November. Earthquakes of this magnitude are not frequent in this area, but they do occur regularly (the previous one was recorded in March 2024). In general, seismic activity in this area is persistent and it is connected to the presence of geothermal activity. According to the deformation data (GPS and satellite) the ground uplift at Askja continues at stable rate."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seismic activity along the Sundhnúkur crater row remains relatively low. Typically, a few earthquakes are recorded each day and are generally located between Stóra-Skógfell and Sýlingarfell. In recent days, however, weather conditions have decreased the sensitivity of the seismic monitoring system. Ground uplift and magma accumulation under Svartsengi continue at a similar rate to recent weeks. An estimation of the volume of magma that will likely be required to trigger a new intrusion or eruption has been calculated. The minimum volume required is estimated to be approximately 23 million cubic meters. If magma accumulation continues at a similar rate, this threshold could be reached by the end of November. According to the interpretation of the latest data, and based on experience from previous events, it is unlikely that sufficient pressure will have built up to trigger an eruption in November. If the rate of uplift in Svartsengi changes, this assessment will be adjusted accordingly."}],"additional_notes":""},{"id":548,"published_at":"2024-11-20T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.4 on November 13 without further escalation."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"Seismic activity in the Sundhnúkar crater row remains relatively low. A few earthquakes have been recorded daily, most of them located between Stóra-Skógfell and Sýlingarfell. Uplift and magma accumulation beneath Svartsengi continue. However, GPS measurements have shown indications that the rate of uplift may have slowed in recent days. It is too early to definitively conclude whether these changes indicate a slowdown in magma inflow, as similar variations have been observed across the GPS network far from Svartsengi. At this stage, external factors, such as space weather or changes in satellite orbits, cannot be ruled out as a possible cause. If the GPS measurements reflect genuine changes in deformation and a slowdown in uplift and magma accumulation, this will become clearer next week when new satellite images are available to conduct a comparison with the deformation measured by the GPS network. The Icelandic Meteorological Office's scientists continue to assess that it is unlikely sufficient pressure will build up to trigger an eruption in November. One factor supporting this conclusion is the low seismic activity measured in the area. If the rate of uplift in Svartsengi changes or if there is a significant increase in seismic activity, this assessment will be revised accordingly."}],"additional_notes":""},{"id":549,"published_at":"2024-11-27T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.2 on November 27 without further escalation"},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"On 20 November a fissure eruption started between Stóra-Skógfell and Sýlingarfell after a short seismic swarm that started about 40 minutes prior to the eruption. The eruptive fissure was about 3 km long in the beginning of the eruption. During the first days of the eruption the lava flowed mostly to the west towards Svartsengi and on November 21 the western lava front flowed over the Grindavíkur road and over the hot water pipeline that goes from the Svartsengi power-plant towards north (same pipeline as was damaged in the February eruption). The pipeline is protected against the lava flow and is still working normally. The eruption is ongoing and the eruptive activity is confined to one crater east of Stóra-Skógsfell. The lava from this vent is flowing to the east toward Fagradalsfjall. On November 25 the southern and the middle vents ceased activity and lava flow towards Svartsengi decresed significantly at the same time. It cannot be ruled out that lava may still be flowing beneath the solidified surface of the lava field that extended westward toward Svartsengi, despite no visible movements being observed in that part of the lava field overnight. On Monday 25 November the SO2 flux from the eruption was estimated to be approximately 110 kg/s. As volcanic activity diminishes, subsidence at Svartsengi is also decreasing. However, it cannot be definitively stated whether uplift has resumed, despite the most recent GNSS measurement points indicating changes in that direction. Since daily changes are so small, conclusions cannot be drawn from individual data points; instead, trends over a period of several days must be examined. On November 25 the experts from the Icelandic Institute of Natural History measured the lava field's spread on Saturday, about three days into the eruption. According to these measurements, the total volume of lava had reached about 43 million cubic meters, covering approximately 8.5 square kilometers. This is roughly 65% of the volume from the last eruption, which lasted 14 days. IMO's Hazard map will be updated later today. (1) https://en.vedur.is/about-imo/news/eruption-begins-on-the-sundhnukur-fissure-swarm (2) https://www.vedur.is/um-vi/frettir/eldgos-hafid-a-sundhnuksgigarodinni (in Icelandic) (3) https://icelandicvolcanoes.is/ (4) https://en.vedur.is/volcanoes/fagradalsfjall-eruption/"}],"additional_notes":""},{"id":550,"published_at":"2024-12-04T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":null,"status_text":"The eruption which commenced on 20 November at Sundhnúks crater row continues. There has been no significant change in the eruptive activity in recent days, as indicated also by tremor measurements. Lava continues to flow from the active crater, predominantly to the southeast in the direction of Fagradalsfjall. Minor changes have occurred at the lava flow front, but its advance has been overall slow. The crater continues to build up, increasing the possibility of structural collapse. If this occurs, the direction of the lava flow could change, but infrastructure is not considered to be at risk due to the crater's location. Deformation data indicate that there is a balance between the inflow of magma into the reservoir beneath Svartsengi and the outflow of lava at the surface from the active crater. Unhealthy concentration of SO2 was measured at Húsafjall, at about 2 km east of Grindavík, for several hours over the weekend. The hazard assessment has been revised and updated based on the latest measurements and data. Key changes affect Zone 1 (Svartsengi), where the overall hazard for the area has decreased from \"considerable\" (orange) to \"moderate\" (yellow). This change reflects the lack of lava flow propagating toward Svartsengi in recent days. The hazard in Zone 6 has been lowered from \"high\" (red) to \"considerable\" (orange), as the threat from tephra fall is now considered minimal. The hazard of gas pollution remains high in Zones 5 and 6, and very high in Zone 3. The hazard assessment is valid until December 10, provided no changes occur. More information here: 1.https://en.vedur.is/about-imo/news/eruption-begins-on-the-sundhnukur-fissure-swarm 3.https://en.vedur.is/media/uncategorized/Hazard_map_IMO_3des_2024.png 5. https://en.vedur.is/volcanoes/fagradalsfjall-eruption/"}],"additional_notes":""},{"id":551,"published_at":"2024-12-11T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":null,"status_text":"A minor jökulhlaup occurred in Skálm river (East of Mýrdalsjökull) between the 5 to 8 December. It is the fourth minor jökulhlaup since the large flood which occurred in the end of July. Unfortunately, both the seismic and GPS stations located on the glacier (Austmannsbunga) are offline since beginning of November, therefore no deformation or flood tremor signals were recorded during this jökulhlaup. Overall the seismic activity for the month of November has been above the background level. This recent increase in seismicity is not directly related to the jökulhlaup, even though the seismicity showed a sharp increase in July in connection to the large jökuhlaup."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":null,"status_text":"On 10 November, a M3.0 earthquake has been detected 1.5 km SE of Víti. Earthquakes in this area are not unusual and they are due to the persistent geothermal activity in the area. Deformation continues at a similar rate as previous months. ​Seismic and GPS monitoring stations are low on electricity due to short days and icing. Still most of them are sending data, however it can be expected that some of them will go offline in the coming weeks. ​"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":null,"status_text":"A M5.1 earthquake was detected on 8 December without further escalation. It was located on the southern caldera rim and it is the fourth earthquake above M5.0 detected this year. The largest event was a M5.4 occurred in April. Overall, the seismicity in the area is increasing. Indeed, about 74 earthquakes, with intensities above M0.8, have been detected in November, which is the highest monthly rate since 2017. The uplift continues."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":null,"status_text":"The seismicity in the area around Grjótárvatn continues to be significantly higher than usual, with a total of 130 earthquakes detected in November. This monthly rate is the highest since the seismic activity started in 2021. A GPS station was installed in the proximity of the area of the seismic unrest (Hítardalur) on 1 November 2024. So far the deformation data shows no measurable changes. A plan for water sampling in the area has been drafted. ​"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"The seventh eruption which commenced east of Stóra-Skógfell on 20 November has ended. This was confirmed on November 9 during a drone survey conducted by Civil Protection, which observed no activity at the craters. The last glow in the crater was seen on webcams on the morning of December 8. The eruption lasted for 18 days, and out of the seven eruptions that have occurred since December 2023, it is the second-largest eruption by area. As previously reported, ground uplift has resumed around Svartsengi and continued over the past few days. This indicates that magma accumulation has begun again in the reservoir beneath Svartsengi. The hazard assessment has been updated and is valid until December 17, provided no changes occur. The main changes affect Area 3 (Sundhnúksgígar), where the overall hazard level for the area has shifted from \"very high\" (purple) to \"high\" (red). Area 5 also shifts from \"considerable\" hazard (orange) to \"moderate\". Source: 1.https://en.vedur.is/about-imo/news/eruption-begins-on-the-sundhnukur-fissure-swarm 2.https://www.vedur.is/um-vi/frettir/eldgos-hafid-a-sundhnuksgigarodinni (in Icelandic) 3. https://www.vedur.is/eldfjoll/eldgos-a-reykjanesi/haettumatskort/ 4. https://icelandicvolcanoes.is/ 5. https://en.vedur.is/volcanoes/fagradalsfjall-eruption/ Additionally In the report are notes from a long-term meeting, the notes present the activity in November."}],"additional_notes":""},{"id":552,"published_at":"2024-12-18T11:00:00Z","entries":[{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":null,"status_text":"M3.3 was detected on 13 December without further escalation."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"A photogrammetric survey was conducted by Náttúrufræðistofnun and Landmælingar Íslands in a flight over the eruption site on the 13th of December. The data reveals that the lava field that was formed during the last eruption (20th of November to 9th of December) had a total volume of 49,3 million cubic meters and an area of 9,0 square kilometers. The thickest part of the lava field was around the craters and close to the barriers by the Blue Lagoon but the average thickness of the lava was 5,5 meters. This eruption, which lasted for eighteen days, was the second largest eruption in volume size compared to the previous eruptions on the Sundhnúkar crater row. The largest eruption (22. August – 5th of September) had a volume of 61,3 million cubic meters and area of 15,8 square kilometers (see graph). GPS data from Svartsengi shows that the uplift continuous at a similar rate. This suggests that magma accumulation also continues at a similar rate. The likelihood of a new intrusion, or even an eruption, increases as the magma accumulation continues, however it is yet too early to determine a timeline for such events. The Icelandic Meterological Office has issued an updated hazard assessment map which is valid until the 2nd of January 2025, unless circumstances change. The update affects area 3, which has been updated from a high hazard (red) to a considerable hazard (orange). Source: 1.https://en.vedur.is/about-imo/news/eruption-begins-on-the-sundhnukur-fissure-swarm 2.https://www.vedur.is/um-vi/frettir/eldgos-hafid-a-sundhnuksgigarodinni (in Icelandic) 3. https://www.vedur.is/eldfjoll/eldgos-a-reykjanesi/haettumatskort/ 4. https://icelandicvolcanoes.is/ 5. https://en.vedur.is/volcanoes/fagradalsfjall-eruption/"}],"additional_notes":""},{"id":553,"published_at":"2024-12-25T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":null,"status_text":"A M3.2 was detected on December 18. The IMO received reports that the earthquake was felt around Borgarfjörður and Akranes. Seismic activity has been measured around Grjótarvatn regularly since spring 2021, but in recent months it has been increasing. The earthquake detected on December 18 is the largest since the autumn of 2021 when two earthquakes of magnitude M3 occurred. Prior to this, significant seismic activity was last detected there in 1992, when two earthquakes of magnitude M3 occurred, one larger than M3.2, and several others above M2.0. The earthquake catalogue goes back to 1991 (SIL-system). The depth of the majority of the earthquakes in the area is now well constrained to be at a depth between 15-20 km. It is currently not possible to determine the cause of the ongoing seismic activity, but two possibilities are considered: magma accumulation at depth or intra-plate tectonic movements. More analysis is needed to assess with certainty which process is responsible for the ongoing activity at Grjótarvatn. However, the current monitoring data indicates that there is no evidence of magma migrating to shallow depths. The GNSS station which was installed in Hítardalur, in September this year, does not show any detectable deformation at the surface. Analysis of satellite data (InSAR) from the period 2019 to summer 2024 also shows no evidence of surface deformation. In the event that magma starts propagating towards the surface, it is most likely that larger precursors will be detected, such as a rapid increase in seismic activity (in terms of number and magnitude of earthquakes), a migration in their depth and/or ground deformation. The IMO will plan the deployment of additional stations (seismic and GNSS) to better constrain the ongoing phenomena and monitor its evolution. More information about the system can be found here: https://islenskeldfjoll.is/?volcano=LJO"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":null,"status_text":"GPS data from Svartsengi shows that the uplift continues at a similar rate. This suggests that magma accumulation also continues at a similar rate. The likelihood of a new intrusion, or even an eruption, increases as the magma accumulation continues, however it is yet too early to determine a timeline for such events. The Icelandic Meterological Office has issued an updated hazard map which is valid until the 2 January 2025, unless circumstances change. The update mainly affects area 3 (Sundhnúks crater row), where the hazard level is now assessed to be considerable (orange) whereas it was high (red) before. Source: 1. https://en.vedur.is/about-imo/news/eruption-begins-on-the-sundhnukur-fissure-swarm 2. https://www.vedur.is/um-vi/frettir/eldgos-hafid-a-sundhnuksgigarodinni (in Icelandic) 3. https://www.vedur.is/eldfjoll/eldgos-a-reykjanesi/haettumatskort/ 4. https://icelandicvolcanoes.is/ 5. https://en.vedur.is/volcanoes/fagradalsfjall-eruption/"}],"additional_notes":""},{"id":554,"published_at":"2025-01-02T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":0,"status_text":"M3.8 was detected on 29 December, without further escalation."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"On 29-31 December a seismic swarm occurred just north of Eldey. About 250 earthquakes were detected with two earthquakes over M3. The largest was a M3.6. There was no further escalation. Earthquake swarms near Eldey have been frequent in recent years, with nearly 60 earthquakes over magnitude 3 recorded there in the past four years."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Deformation data up to December 30, 2024, indicates that magma accumulation beneath Svartsengi continues. The likelihood of a new magma intrusion and potentially an eruption is expected to increase when the volume of magma beneath Svartsengi matches the amount that left the magma region during the magma intrusion and eruption on November 20. Geodetic model results estimate this volume to be between 12 and 15 million cubic meters. According to the latest deformation data, the magma inflow rate is currently estimated at just over 3 m³/s, similar to the rate observed before the last eruption. If magma accumulation continues at the current rate, the magma volume beneath Svartsengi is projected to reach 12 million m³ by late January and approximately 13.5 million m³ by the first week of February. Therefore, the likelihood of magma intrusion and potentially an eruption along the Sundhnúkur crater row may increase by late January. These estimates are based on calculated magma inflow rates over time, and small changes in these rates can affect projections for the timing of a potential eruption. The Icelandic Meteorological Office’s hazard assessment has been updated and remains valid, barring any changes, until January 14, 2025. The main change concerns Zone 6, where the overall hazard level has been revised from significant (orange) to moderate (yellow). The overall hazard in Zone 6 is now considered lower due to a reduced lava flow hazard. However, while the danger due to the lava flow is currently deemed lower, the existing lava field remains hot and dangerous to cross. Seismic activity has been minimal along the Sundhnúkur crater row since the last eruption ended on December 8, 2024. Source: 1.https://en.vedur.is/about-imo/news/eruption-begins-on-the-sundhnukur-fissure-swarm 2.https://www.vedur.is/um-vi/frettir/eldgos-hafid-a-sundhnuksgigarodinni (in Icelandic) 3. https://www.vedur.is/media/uncategorized/Haettusvaedi_VI_2jan_2025.png 4. https://icelandicvolcanoes.is/ 5. https://en.vedur.is/volcanoes/fagradalsfjall-eruption/"}],"additional_notes":""},{"id":555,"published_at":"2025-01-08T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"No significant changes are observed in seismicity between months. Inflation has been ongoing at Askja since end of summer 2021 but a decline in rate was observed late in 2023 and continues at a steady rate since then. The inflation is caused by magma accumulation at 3-4 km depth beneath the Askja caldera."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":0,"status_text":"M4.1 was detected on 8 January, without further escalation. Increasing inflation rate and seismicity are observed since late 2023. The increased activity is due to magma accumulation at depth under the Bárðarbunga caldera, which started shortly after the end of the Holuhraun eruption in 2014-2015."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"On Thursday, January 2nd, a continuous seismic tremor was recorded between 5 PM and 6 PM, originating near Grjótárvatn. The tremor, which lasted approximately 40 minutes, consisted of continuous micro-earthquakes, most of which were too small to locate. However, only two earthquakes within the burst were located. These were at a depth of approximately 15 km, with magnitudes of M1.5 and M1.8. In total, about 20 earthquakes were recorded on that day, all at depths of 15–20 km and with magnitudes ranging from M0.1 to M2.0. Further analysis of seismic data near Grjótárvatn shows a high b-value (~2). High b-values are often associated with seismic activity in volcanic areas rather than in tectonic settings and indicate an unusually high proportion of small earthquakes. Typically, earthquakes at such great depths are not recorded in Iceland, except in some volcanic systems. It is likely that these earthquakes are caused by magma rising from the mantle and intruding into the base of the crust under sufficient pressure to cause seismic activity. IMO will continue to work on improving the monitoring network in the area to further understand and assess the potential evolution of the ongoing activity."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Magma accumulation continues in the Svartsengi region. During the last eruption, it is estimated that around 12–15 million cubic meters of magma were released from Svartsengi. Once this volume is recharged again, it is considered that the likelihood of a dike propagation and/or an eruption increases. Model calculations suggest that the 12-million-cubic-meter mark will be reached by the end of January. Seismic activity around Svartsengi and the Sundhnúkur crater row remains very low. The Icelandic Meteorological Office's hazard assessment will be updated on January 14, provided no changes occur. Additionally This report includes results from the monthly monitoring meeting held at IMO this morning."}],"additional_notes":""},{"id":556,"published_at":"2025-01-15T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"YELLOW","vals_level":0,"status_text":"Yesterday 14 January a strong earthquake swarm began shortly after 6:00 UTC in the northwestern part of the Bárðarbunga caldera. Approximately 130 earthquakes have been recorded since the swarm began, with the largest reaching magnitude M5.1 at 8:05 UTC. Additionally, 17 other earthquakes with a magnitude of 3 or higher were detected, including at least two with magnitude 4 or above. Earthquake activity was most intense until around 9:00 UTC, after which it began to decrease. The seismic activity at Bárðarbunga has been relatively low over the night. No further escalation has been detected. This is the most significant activity in Bárðarbunga since the 2014-2015 eruption in Holuhraun. The observed seismicity is consistent with increased pressure caused by magma accumulation, which has been ongoing since the last eruption in 2015. Earthquake activity has been increasing gradually in Bárðarbunga over recent months. Notably, four earthquakes measuring magnitude 5 or higher were detected in 2024. Additionally, geodetic deformation data suggests an increased rate of inflation at the volcano. Magma intrusions, or dyke formations, from the caldera could lead to eruptions outside the caldera, as seen in the 2014-2015 Holuhraun eruption and the Gjálp eruption in 1996. Alternatively, an eruption could even occur within the caldera itself. Should an eruption take place beneath the glacier, it may trigger explosive ash emissions and glacial outburst floods (jökulhlaup). However, if an eruption occurs outside the glacier, it will likely result in a lava-producing event. IMO will continue to monitor the activity closely, but it is difficult to predict how it will develop at this point. Bárðarbunga is unique in that it is an unusually large volcanic system, partly covered by a glacier, and several scenarios are possible. As a precaution, the aviation colour code for Bárðarbunga was raised to Yellow, indicating heightened activity above normal background levels. If the seismicity will resume or other monitoring parameters will indicate progresses in the volcanic unrest, the aviation color code will be promptly reassessed. As the evolution at Bárðarbunga remains uncertain, the aviation color code is kept yellow for the time being."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"In recent days, a slow and gradual increase in tremor has been detected on Grímsfjall, and the water level in Gígjukvísl, river south of Vatnajökull, has been slowly increasing in the past couple of days. Therefore, a glacial outburst flood (jökulhlaup) has started from Grímsvötn. Typically, these glacial outburst floods increase gradually over days and peak discharge from Grímsvötn subglacial lake is likely to be reached in the next few days. The flood tremor recorded at the seismic station on Grímsfjall shows the development of the flood, but it can be affected by high winds today and tomorrow and therefore it might be complicated to interpret the tremor signal. There are past examples of Grímsvötn eruptions starting, following a flood. The drainage of the water from Grímsvötn lake reduces the pressure on top of the volcano and this can result in an eruption. This happened in 2004, and before that in 1934 and in 1922. However, thirteen glacial floods have occurred since 2004 without triggering an eruption. The last glacial outburst flood from Grímsvötn occurred a year ago, and floods have been recurring approximately annually since November 2021. According to data from the Institute of Earth Sciences (University of Iceland), the water volume in Grímsvötn at the start of the current flood was estimated at 0.25 km³, comparable to or slightly less than the volume before the previous flood. This volume is about one-third of the amount stored before a larger flood in late 2021. Currently there are no indications of volcanic tremor or elevated seismicity around Grímsvötn. IMO continues to monitor Grímsvötn volcano very closely during this flood event and the aviation color code will be reassessed if there will be any other indications of increase in activity at the volcano."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Since 2 January, there has been one other deep tremor event recorded. That was on January 10 between 13 and 14 UTC. In the past weeks about 45 earthquakes have been detected. The largest was a M2.9 which occurred on 12 January. IMO will continue to work on improving the monitoring network in the area to further understand and assess the potential evolution of the ongoing activity."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Ground uplift in the Svartsengi area continues at a similar rate to previous weeks. By using geodetic model results, it is assessed that by the end of January or beginning of February, a period of high uncertainty will start. Within this period, the occurrence of an eruption becomes more likely and a new eruption might occur at any time. These models results are based on estimated magma inflow rates, therefore minor changes in the magma inflow could impact the estimated timing of this high uncertainty period. Seismic activity around Svartsengi remains low, similar to recent weeks. The Icelandic Meteorological Office hazard assessment has been updated on 14 January with no changes made. It remains valid, barring any changes, until January 28."}],"additional_notes":""},{"id":557,"published_at":"2025-01-22T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity continues to increase near Grjótárvatn. So far in January, nearly 100 earthquakes above M1.0 have been recorded. This is comparable to the total number of earthquakes in December 2024, which was the highest monthly count ever recorded in the area. On January 16, an M3.2 earthquake was detected. No reports have been received by the Icelandic Meteorological Office indicating that the earthquake was felt in inhabited areas, though residents in nearby regions may have noticed it. This was the largest earthquake recorded in the area since activity began increasing in August 2024; previously, an M3.1 earthquake was recorded on December 18, 2024. The Icelandic Meteorological Office continues to monitor the activity closely and is working on a new monitoring plan for the area. This includes plans to increase the number of instruments to improve the real time monitoring network and gain a clearer understanding of the development and causes of the activity. More information available at IMO's website: https://en.vedur.is/about-imo/news/seismic-activity-in-grjotarvatn-has-increased-in-the-last-months"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic swarm that occurred at Bárðarbunga on the morning of January 14 did not escalated further. Only five earthquakes have been detected in the past week. As there was no evidences of imminent threat to the aviation, the aviation color code for Bárðarbunga was moved back to green on 16 January. IMO continues monitoring the area 24 hours a day."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"The tremor recorded on the seismometer at Grímsfjall and the water level in Gígjukvísl have returned to similar values as before the flood. This marks the end of the Grímsvötn glacial outburst flood, which began approximately 12 days ago. The flood reached it´s peak on 15 January. Seismic activity in Grímsvötn did not increase during the flood, although a few earthquakes below M2 were detected last week. The pressure release caused by the jökulhlaup did not trigger increased activity in Grímsvötn while the flood was ongoing. As a result, the aviation color code for Grímsvötn was lowered back to green on 20 January, after being temporarily raised to yellow when the flood peaked. Although the jökulhlaup has ended, the Icelandic Meteorological Office will continue to closely monitor activity in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"GPS measurements indicate that the rate of uplift has slightly decreased in recent weeks. However, interpreting individual GPS data points can be challenging, as seasonal disruptions cause increased variability from day to day due to weather conditions. Instead, it is crucial to consider the overall trend, which continues to show ongoing uplift. This means that the event is still unfolding similarly to previous eruptions. According to model calculations, the volume of magma beneath Svartsengi is expected to reach its lower threshold by late January or early February. This suggests that the likelihood of a magma intrusion—and potentially an eruption—along the Sundhnúkur crater row may increase from that time. Seismic activity from 9 November until today has been most pronounced in nearby volcanic systems around Trölladyngja and slightly in Fagradalsfjall, while activity remains very low near Sundhnúkur and Svartsengi. The hazard assessment will be updated next week on January 28, if no changes occur. The new map will account for the increased likelihood for an eruption, according to the mentioned timeline."}],"additional_notes":""},{"id":558,"published_at":"2025-01-29T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Deformation measurements indicate continued ground uplift and magma accumulation beneath Svartsengi. The sequence of events remains similar to those observed before the last eruptions. Modeling calculations show that the volume of magma accumulating beneath Svartsengi is nearing the volume drop that occurred during the last event. Based on the analysis of previous events, scientists have assessed that once a similar volume of magma has accumulated beneath Svartsengi as during previous eruptions, the likelihood of a new magma intrusion and even an eruption increases. The Icelandic Meteorological Office has updated the hazard assessment, which is now valid until February 11, barring any changes. It has been decided to raise the hazard level in zones 4 and 6 from “moderate” (yellow) to “considerable” (orange). This change is based on modeling calculations indicating that the volume of magma accumulating beneath Svartsengi is nearing the volume drop that occurred during the last event. According to the weather forecast, severe weather is expected to occur in the coming days, beginning January 30 throughout the week. A southern storm accompanied by significant warming, rain, and drizzle is forecasted for southern and western parts of the country later this week and into the weekend. Adverse weather could reduce the sensitivity of the monitoring network, potentially delaying response times to an eruption. Seismic activity in the Sundhnúkar crater row has been increasing gradually since the end of the eruption on December 9, 2024, but overall it remains low. Developments over the past year suggest that seismic activity prior to magma intrusions has been decreasing with each event. Consequently, there is a possibility that seismic activity may not be significant prior to the next eruption."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":0,"status_text":"A M3.4 earthquake occurred on 27 January without further escalation, there has been minor seismicity in Bárðarbunga since the seismic swarm which occurred on January 14."},{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":0,"status_text":"On January 24, an earthquake measuring M3 occurred on the Hvalhnúkar fault. Recently, the area has experienced some activity, with approximately 50 earthquakes recorded in the past week. This is the first earthquake above M3 in the region since September 2018. Historical data shows that only a few earthquakes above M3 have been recorded in this area. The largest occurred in 2000, during the South Iceland Earthquake, and had a magnitude of M5.5. Before that, the last earthquake exceeding M3 occurred in 1996. These earthquakes serve as a reminder that the region has the potential for significant seismic events. However, it is impossible to predict precisely when such an event might occur."}],"additional_notes":""},{"id":559,"published_at":"2025-02-05T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"The weather forecast for today and tomorrow (5.February - 6.February) indicates a series of low-pressure systems moving across the country, bringing strong southwesterly and southerly winds along with precipitation. These weather conditions may affect measurement capabilities, particularly in terms of visibility and the sensitivity of seismic and real-time GPS measurements. Deformation measurements continue to show ongoing land uplift and magma accumulation beneath Svartsengi. As reported last week, the amount of magma accumulating beneath Svartsengi is now approaching the lower threshold, believed to be necessary to trigger the next magma intrusion. If we look at the recent eruptions on the Sundhnúkur crater row, they have occurred anywhere between three days and four weeks after reaching this lower threshold. However, this does not mean that the next event will occur within a month, but rather that experience suggests this as the most likely scenario. Seismic activity near the Sundhnúkur crater row has remained low since the last eruption ended on 9 December. Only a few small earthquakes are being recorded daily. However, poor weather conditions and strong winds may affect measurement sensitivity. The hazard assessment remains unchanged and is valid until February 11, barring any changes."}],"additional_notes":""},{"id":560,"published_at":"2025-02-12T11:00:00Z","entries":[{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":0,"status_text":"By looking over a time period spanning between 2000 and 2025, the level of seismic activity in Hofsjökull has been constantly increasing with time. The rate of earthquakes started to pick up in 2023. On average (over the past 2 years) the rate is of 10 earthquakes per month and earthquakes measured up to M3.3 in size (on December 2024)."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Regular gas measurements have been conducted to measure gas composition and ratios on the Reykjanes peninsula. The most recent measurements do not show any significant changes from the background in the area."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"In January 2025 about 140 earthquakes (>M1.0) were recorded, the largest one was a M3.2 (16 January 2025). This is the largest earthquake detected in the area since the seismicity started in 2021. The depth of the earthquakes is stable about 15-20 km. The rate of seismicity keeps increasing, with about 250 earthquakes recorded in total in this area in January 2025, which is the highest rate since 2021. Water samples have been collected in few places (springs and rivers) to monitor the content of dissolved gases. The CO2 concentration has been analysed and the results show no significant changes when comparing to other samples taken in the same area few years ago. Regular samplings will be conducted to monitor and detect if any changes occur. Work is ongoing to increase the monitoring level in the area by adding additional seismometers and GPS stations."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"GPS measurements indicate ongoing ground uplift beneath Svartsengi with slightly decreased rate in the recent weeks. Similarly, model calculations show continued magma accumulation. The estimated volume of magma accumulated beneath Svartsengi has reached the lower threshold believed to be necessary to trigger the next dike intrusion and potential eruption. Past events at the Sundhnúkur crater row suggest that once the magma volume reaches this threshold, eruptions have occurred within a time frame of a few days to four weeks. This does not guarantee that the next event will happen within a month, but experience suggests this is the most likely scenario. Regular gas measurements have been conducted to measure gas composition and CO2 flux on the Reykjanes peninsula. The most recent measurements do not show any significant changes from the background in the area. Seismic activity has slightly increased in recent days. Looking at the number of earthquakes since the last eruption, a gradual increase has been observed since late January. However, stormy weather last week may have affected the sensitivity of the earthquake monitoring system, possibly preventing the detection of the smallest earthquakes. The hazard assessment has been updated but remains unchanged and is valid until February 18, unless conditions change. Additionally Today 12 February a monthly volcano monitoring meeting was held at IMO. The report includes results from that meeting. For this reason the compilation of this report took longer than expected."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"No significant changes in seismicity in the past month. Deformation continues at a stable rate. In January a field trip was conducted to maintain monitoring equipment in the area. Since then all monitoring instrument are online and streaming. Satellite image acquired January 22 show normal conditions in the area for this time of the year."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"Overall normal seismic activity has been detected in the area over the past weeks. Gas measurements in the area show no changes from the background."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":0,"status_text":"Normal background seismic activity over the last month. The multigas instrument on top of Hekla, for measuring gas concentration and ratios, will be replaced in the next weeks."}],"additional_notes":""},{"id":561,"published_at":"2025-02-19T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"An M3.3 earthquakes was detected on 14 February without further escalation. About 35 earthquakes have been detected in the past week which is within background level."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity, about 20 earthquakes have been detected in the past week."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Deformation measurements show continued ground uplift, although it has slightly slowed in recent weeks. Updated model calculations suggest that magma accumulation is approaching the median volume believed necessary to trigger a dike propagation or even an eruption. Based on measurements, model calculations, and lessons learned from previous events on the Sundhnúksgígar crater row, the likelihood of an event occurring within the coming days or weeks continues to increase. Seismic activity on the Sundhnúksgígar crater row has remained similar over the past week, with around five or fewer earthquakes recorded per day. However, seismic activity in the area has been slowly increasing since late January. The hazard assessment has been updated but remains unchanged. It is valid until February 25, unless conditions change."}],"additional_notes":""},{"id":562,"published_at":"2025-02-26T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"A M5.1 earthquake occurred in the evening of 22 February. Around 20 aftershocks were detected and the two largest were M3.1 and M3.0."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity continues in the area near Grjótárvatn. Last week around 30 earthquakes were detected, all below M2.5."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Deformation measurements indicate continued land uplift in the Svartsengi area, although it has slowed slightly in recent weeks. Updated model calculations suggest that magma accumulation has exceeded the amount that was present beneath Svartsengi before the eruption that began on November 20. The likelihood of the next event occurring within the coming days or weeks remains elevated. It is anticipated that an eruption may start with very short warning Seismic activity in the area has been gradually increasing since late January. The hazard assessment has been updated with no changes and remains in effect until March 4, barring any changes in the situation."}],"additional_notes":""},{"id":563,"published_at":"2025-03-05T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity continues in the area near Grjótárvatn, in the SE part of Ljósufjöll volcanic system. Last week around 17 earthquakes were detected, largest was a M2.9. In February about 100 earthquakes were detected in the area, with the largest measuring M3.0 on February 5. Since August 2024, activity in this area has been increasing, and in January 2025, the highest number of earthquakes in a single month was recorded, around 250. Thus, activity in February was lower than in previous months but still considerable."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Deformation measurements indicate that land uplift continues at a similar rate as in recent weeks. The amount of magma beneath Svartsengi is now greater than what was estimated before the eruption that began on November 20. The likelihood of magma intrusion and an eruption is increasing, and all indications suggest that this could happen within the coming days or weeks. Based on previous events on the Sundhnúkur crater row, the likelihood of a new event occurring within the next few days or weeks is increasing. It is most likely that magma would first reach the surface in the area between Sundhnúkur and Stóra-Skógfell. This has been the case in six out of the seven eruptions that have taken place since volcanic activity began in late 2023. The exception was the eruption in January 2024 when magma erupted just south of Hagafell. Seismic activity around Sundhnúkur has slightly decreased in recent days compared to previous weeks. However, recent bad weather may have affected the measurement system's sensitivity, limiting the detection of smaller earthquakes. Due to repeated events along the Sundhnúkur crater row, where magma intrusions and eruptive fissures have formed, stress in the crust has been reduced with each event. This means that fewer and smaller earthquakes are recorded in the days and weeks leading up to an eruption compared to the early eruptions. Eruptions are expected to occur with very limited warning time. In the last two eruptions, only about 30–40 minutes passed from the first signs of seismic swarm to the onset of an eruption. The key signs observed when magma is moving toward the surface include intense small earthquake swarms along the Sundhnúkur crater row, pressure changes in HS Orka boreholes in Svartsengi, deformation detected in a fiber-optic cable, and surface deformation observed through real-time GPS measurements."}],"additional_notes":""},{"id":564,"published_at":"2025-03-12T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity within background level. Uplift continues at a stable rate. Most of the monitoring equipment around Askja is up and running."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Continued magma accumulation underneath Bárðarbunga as reported previously. Seismicity is within background level, however earthquakes over M5 continue to be detected. An earthquake of magnitude M5.1 was detected February 22 on the norther rim of the caldera and this morning (12 March) an earthquake of magnitude M3.5 was recorded on the southeastern rim."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"Overall normal seismic activity has been detected in the area over the past weeks. Gas measurements in the area show no changes from the background."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":0,"status_text":"Normal background seismic activity over the last couple of months. An earthquake of magnitude M2 was detected on March 8 which is not common in Hekla, indeed the last earthquake of similar size was recorded in March 2024. No increase seismicity did follow this M2 event. The Multigas instrument on top of Hekla is still out. A survey trip was made to Hekla yesterday 11 March to replace the instrument and it was found that the hut hosting the instrument had blown away. Additional work needs to be done to put the Multigas back in place."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismicity activity, however fewer earthquakes have been detected in January and February compared to December 2024. The overall seismicity is still above the know background level for this volcano."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Normal background seismic activity over the last month. A trip to Katla will be conducted in the coming weeks to fix GPS station at Austmannsbunga and Enta."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"On 9-11 March, a seismic swarm closed to about 200 earthquakes occurred few kms north of the Seltún geothermal area. The largest earthquake detected had a magnitude M3.0 and the majority of the earthquakes were below M1. Seismic swarms are rather common in this area, no other unusual geophysical observations are detected so far."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity, however in February and March the seismicity has been less than in January. IMO is progressing in implementing increased monitoring level for the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Deformation measurements show that land uplift continues at the same rate as in recent weeks. Magma continues to accumulate beneath Svartsengi, and its volume has reached the highest level recorded since the eruptive series began at the Sundhnúkur crater row in December 2023. Seismic activity in the Sundhnúkur crater row has been gradually increasing alongside magma accumulation, following a pattern similar to that observed before the November eruption. Since the last eruption ended, seismic activity has been located slightly further east compared to the activity leading up to the eruption that began on November 20, 2024. The earthquakes east of the Sundhnúkur crater row are likely tectonic earthquakes caused by increased pressure in the region due to magma accumulation. Therefore, these earthquakes are not necessarily an indication of the likely eruption site, although this cannot be ruled out. Further analysis of the seismic data is currently underway and may shed more light on the cause of this shift in the earthquake location. Considering the increasing seismic activity alongside continued land uplift and magma accumulation, the most likely scenario is that this period of magma accumulation will result in a dike intrusion towards the Sundhnúkur crater row. It is likely that this will result in a volcanic eruption, marking the eighth eruption since the end of 2023. Three months have passed since the most recent eruption concluded, lasting 18 days and ending on December 8. This is the longest period of magma accumulation that has been observed during this eruptive series on the Sundhnúkur crater row, with today marking 111 days since the last eruption began on November 20, 2024. The volume of magma that has accumulated beneath Svartsengi during this period is the highest estimated since the beginning of this eruptive series in December 2023. Therefore, it is possible that, if an eruption occurs in the coming days or weeks, it could be comparable to or larger than the eruption in August 2024, which was the largest so far in terms of volume. Based on past events, the size of the possible eruption will depend on how much magma is released from the magma chamber when the eruption begins. Currently, it is difficult to predict the size of the next event with certainty. The hazard assessment has remains unchanged and is valid until March 18, barring any changes. Additionally Today 12 March a monthly volcano monitoring meeting was held at IMO, the report includes results from that meeting."}],"additional_notes":""},{"id":565,"published_at":"2025-03-19T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"This morning at around 8:20 UTC a M4.2 earthquake occurred on the SE of the caldera rim. Few smaller earthquake did follow without further escalation."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity in the area continues but at lower rate. In February and March the seismicity has been less than what detected in January. IMO is progressing in implementing increased monitoring level for the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"There has been a clear increase in seismic activity near the Sundhnúkur crater row on a weekly basis, except for the last week of February, which was likely due to weather conditions. On March 11, it was reported that seismic activity appeared to be positioned several hundred meters further east than in the lead-up to previous events. Initially, these earthquakes were thought to be triggered by increased pressure from magma accumulation beneath Svartsengi. Meteorological Office experts have since conducted a high-resolution analysis of earthquake locations. Earthquake locations are determined using signals from multiple seismometers in a given area, meaning that interference from a single instrument can affect the final location calculations. The influence of each seismic station in the region on the earthquake positioning results was analyzed, revealing an issue with one instrument that caused the seismic activity to appear farther east than before. The seismometer has been corrected and earthquake activity continues in the same location as in the lead-up to previous eruptions—between Sundhnúkur and Stóra-Skógfell—where magma first reached the surface in six of the seven eruptions since December 2023. Deformation measurements (GPS measurements) indicate that uplift continues, although at a slightly reduced rate. There are no signs of subsidence in the area around Svartsengi, according to GPS data and InSAR observations. Magma continues to accumulate beneath Svartsengi, and its volume has never been greater since the eruption sequence at the Sundhnúkur crater row began in December 2023. The hazard assessment has been updated but remains unchanged and is valid until March 25, unless conditions change. Reykjanes ridge: On 12 March - 14 March a rather intense earthquake swarm began offshore Reykjanestá. The swarm was most intense at the beginning when about 50 – 60 earthquakes were recorded in the first few hours. As the day progressed, the activity decreased but then increased again shortly before midnight when an earthquake of magnitude 3.5 occurred. When the activity increased again in the evening, it shifted slightly westward. On March 14 the activity shifted again further to the east. So the activity came in three clusters. About 600 earthquakes have were detected within in the area, including six earthquakes over magnitude M3. Reports have been received that some earthquakes were felt in populated areas, including Grindavík town, which is about 12 km east of the activity. The behavior of the swarm so far shows that the activity can decrease and then suddenly increase again. Since 2023, five earthquake swarms have occurred in the same area where the activity is now. In addition, there have been considerable swarms there in 2021 and 2022, to name a few examples. The earthquakes are possibly trigger earthquakes due to changes in the stress field on the Reykjanes Peninsula in conjunction with seismic activities and magmatic intrusions in the recent years. Deformation data over the past few days do not show clear evidence that the current seismic activity is due to magma movement at depth underneath Reykjanesstá. However, scientists at the Icelandic Meteorological Office are closely monitoring all measurements around Reykjanesstá to identify the most likely cause of the earthquake swarm."}],"additional_notes":""},{"id":566,"published_at":"2025-03-26T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity in the area around lake Grjótárvatn, in the SE part of Ljósufjöll volcanic system, continues but at lower rate. Last week eight earthquakes were detected, all below magnitude M2.0. IMO is progressing in implementing increased monitoring level for the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"GPS deformation data shows that magma continues to accumulate beneath Svartsengi, although the rate of uplift has decreased in recent weeks. Despite the slower uplift, experts still consider likely that a dike propagation and/or eruption will occur along the Sundhnúkur crater row in the coming days/weeks. The potential size of the eruption depends on how much magma is released from the magma accumulation zone when the eruption begins. The volume of magma has never been greater since the eruption sequence at the Sundhnúkur crater row began in December 2023, meaning the next eruption could be larger than previous ones in terms of volume. It is most likely that magma will reach the surface in the area between Sundhnúkur and Stóra-Skógfell, a pattern seen in six of the seven eruptions since volcanic activity resumed in late 2023. The exception was the eruption in January 2024, when magma first emerged just south of Hagafell. Seismic activity has been slowly increasing in recent weeks. Repeated events along the Sundhnúkur crater row, where magma intrusions and eruptive fissures have formed, have reduced stress in the crust over time. As a result, fewer and smaller earthquakes are detected in the lead-up to eruptions, compared to earlier in the eruption sequence. Warning time before an eruption is expected to remain very short; in the last two eruptions, only 30–40 minutes passed from the first signs of increased seismicity to the actual onset of eruption. Indicators that magma is moving toward the surface include intense earthquake swarms on the Sundhnúkur crater row, pressure changes in HS Orka's boreholes at Svartsengi, deformation observed in fiber-optic cables, and surface changes captured by real-time GPS measurements. The hazard assessment remains unchanged and is valid through April 1, unless conditions change."}],"additional_notes":""},{"id":567,"published_at":"2025-04-02T11:00:00Z","entries":[{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":0,"status_text":"On 30 March a M3.2 was detected in Vífilsfell without further escalation."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":0,"status_text":"Yesterday, April 1 at 06:30 UTC, an intense seismic swarm began along the Sundhnúks crater row. Deformation measurements and borehole data indicated changes consistent with dike intrusion. At approximately 09:44 UTC, a volcanic eruption began about 1 km north of Grindavík. The eruptive fissure was around 1,200 meters long and extended through the protective barrier surrounding Grindavík. The eruption was short-lived, and by 17:00 UTC, drone footage confirmed that there was no remaining activity within the fissure. However, seismicity continued along the dike intrusion, which extended significantly farther to the northeast than before, with the total length of the dike now estimated at about 20 km. The seismic activity was most intense in the northeastern part of the dike, with earthquake depths ranging from approximately 4 to 6 km. Several large triggered earthquakes have been detected in association with the dike intrusion, the largest being a magnitude 5.3 event located near Reykjanestá. In total, around 3,000 earthquakes have been recorded in connection with this activity. Although seismic activity decreased slightly during the night, between 80 and 100 earthquakes per hour are still being detected. According to first model calculations, majority of the magma has flowed from Svartsengi into the dike beneath the Sundhnúkur crater row, with only approximately 0.4 million cubic meters reaching the surface. Further model calculations will be done in the coming days. The resulting lava field is the smallest one produced since the eruption sequence began in the Sundhnúkur crater row in December 2023. Its volume is about one-sixth of the lava field produced during the January 2024 eruption, which was the second smallest eruption in the series. As long as seismic activity and deformation continue, it must be considered likely that a new eruptive fissure could open. The most probable location for such an opening is in the area where seismic activity is currently most concentrated. Should a new eruption occur, it may be accompanied by significant earthquake activity, potentially noticeable to residents in Vogar."}],"additional_notes":""},{"id":568,"published_at":"2025-04-09T11:00:00Z","entries":[{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"In recent weeks deep seismic activity has been detected in Eyjafjallajökull at a depth of about 16-24 km. About 20 earthquakes have been manually located. Deep seismicity like this is not frequent in Eyjafjallajökull. There are no indication of deformation in the area."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity in recent months has been at a background level."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity in the past two months has been at a background level but seismicity in December 2024 was considered above background level."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity is slowly declining in March and February compared to January. About 100 earthquakes have been detected in February and March, whereas 200 earthquakes were detected in January. IMO plans to add one seismic station and one GPS station in the area to increase the monitoring. In addition two GPS stations owned by the Natural Science Institute of Iceland have been added to IMO's monitoring network."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Deformation measurements show that uplift beneath Svartsengi has resumed. The current uplift rate is faster than that observed following previous eruptions. This may be explained by the large volume of magma — around 30 million cubic meters — that was released from the system during the most recent event. However, it is still too early to predict how the rate of magma accumulation will develop. Past events have shown that accumulation rates typically decline as more time passes between eruptions. At least a week, and possibly several weeks, will need to pass before we can evaluate if — and how — the rate of accumulation will change. Based on the data currently available, magma continues to flow into the Svartsengi system, indicating that the volcanic activity in the Sundhnúkur crater row area is not over. As long as this accumulation continues, repeated intrusions — and potentially eruptions — remain likely. The Icelandic Meteorological Office continues to monitor the area closely and assess possible scenarios based on the latest data. According to model calculations, approximately 30 million cubic meters of magma flowed from the magma chamber beneath Svartsengi into a newly formed dike on April 1. This marks the largest magma intrusion since November 10, 2023. Microseismic activity continues to be measured along the northern part of the April 1 dike. Additionally, triggered earthquakes are still being detected near Reykjanestá and west of Kleifarvatn. While deformation has decreased around the northern part of the dike, deformation continues to be detected near the dike itself on GPS stations and satellite imagery. The hazard assessment has been updated and is valid until April 15, provided no major changes occur. Significant changes have occurred across nearly all zones since the last assessment: Zone 3 (Sundhnúkur crater row) has been downgraded from „high“ (red) to „considerable“ (orange) Zone 4 (Grindavík), as well as Zones 5, 6, and 7, have moved from „considerable“ (orange) to „moderate“ (yellow) Zone 1 remains at „moderate“ (yellow) Despite the reduction in hazard levels in many areas, there is still a notable risk of ground collapse into existing faults."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"Last week, short bursts of low-frequency earthquakes or tremor episodes resumed. These occurred from Saturday to Monday, and the tremor was observed widely across the country. Similar episodes have happened before in October-November 2021, June 2023 and October 2024. There are significant geothermal areas near the locations of the earthquakes. There is no measurable uplift at the moment. Additionally Today 9 April a monthly volcano monitoring meeting was held at IMO. The report includes results from that meeting."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"Uplift continues at a stable rate. Seismic activity is at a normal background level."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismic activity in March has been at a normal background level. Largest earthquake in March was a M4.2. In May a field trip will be conducted for maintaing monitoring equipment and measurements in the field. Several stations have already been fixed that includes the GPS station GJAC and other stations just outside of Vatnajökull ice-cap. Two additional webcams have been installed with an overview of Bárðarbunga and NW-part of Vatnajökull. Magma accumulation in Bárðarbunga continues."}],"additional_notes":""},{"id":569,"published_at":"2025-04-16T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Three earthquakes over M3 were detected without further escalation in the last week, the largest was a M4,4 on April 15."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"On April 15 a M3,7 was detected east of Grjótarvatn without further escalation. The earthquake was felt in the area. A total of 50 earthquakes were detected in the past week most of them, nearly 40, occurred in a short seismic swarm in the evening of 12 April. Depth of the earthquakes remains unchanged where most of the events are located at around 16 - 18 km depth."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Minor seismic activity is still being recorded around the dike intrusion that formed on April 1, with dozens of earthquakes occurring daily in the area. The largest earthquake over the past week was a magnitude 3.3 on April 13, located over the northern part of the dike intrusion, about 4 km ENE of Keilir. Most of the earthquakes are under magnitude 2 and at depths of 2 to 6 km. Uplift at Svartsengi continues, though the rate has slowed compared to last week. The current rate is about twice as fast as it was just before the last eruption, and is similar to the rate observed at the start of the current eruption cycle that began in 2024. The Icelandic Meteorological Office continues to monitor the area, track magma accumulation, and assess possible scenarios based on the latest data. As long as magma continues to accumulate beneath Svartsengi, repeated magma intrusions and even eruptions along the Sundhnúkur crater row must be considered possible. Yesterday, April 15 a new version of a hazard map was published and distributed by the Icelandic Meteorological Office to inform and report on the level of hazard due to the ongoing unrest in the Reykjanes peninsula. This map replaces the previous hazard map that has been in use and published since November 2023, which showed hazard assessments for seven well-defined zones near the activity around the Sundhnúkur crater row. The seven-zone map has been updated and issued 108 times since November 20, 2023. While it had its strengths, its limitations included difficulty in assessing hazards outside the defined zones. Recent developments on the peninsula, where a magma intrusion formed and reached the northeastern part of the Svartsengi volcanic system on April 1, 2025, and an eruption that occurred west of the northernmost part of Fagradalsfjall in August 2024, highlight the need for a hazard assessment that covers a larger area. A new map has therefore been developed to address the limitations of the previous version. This new approach is not only applicable to the Reykjanes Peninsula but also introduces a methodology that can be used for all other active volcanic systems in Iceland. There are three major updates in the new map: 1. Volcanic Alert Level - This reflects the current status of the volcanic system and uses a four-tier color-coded scale from 0 (green) to 3 (red). The alert level indicates the status of the volcanic system and determines how the hazard is assessed. 2. Mapped Hazards – The assessment is based on a combined evaluation of seven hazards that are present or may arise: 1) seismic activity, 2) sinkholes, 3) fault movements, 4) eruptive fissure, 5) lava flow, 6) tephra fallout, 7) gas pollution. Each location within the domain shows the cumulative level of hazard according to the volcano status. The shapes and sizes of these areas may change depending on the evaluated hazard at any given time. 3. Target Zones – Once the different hazards are estimated, the averaged hazard level is calculated within pre-selected target zones. For these zones, hazards contributing to the final hazard level are listed and described. The size and shape of these target zones remain fixed, even if their hazard levels may change with time. More information about the hazard map can be found here https://en.vedur.is/volcanoes/fagradalsfjall-eruption/hazard-map/"}],"additional_notes":""},{"id":570,"published_at":"2025-04-23T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Just over 40 earthquakes were detected in the past week, largest was a M2 on 21 April. Depth of the earthquakes remains unchanged where most of the events are located at around 16 - 18 km depth."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Uplift in Svartsengi continues, but the rate has significantly decreased and is now similar to the period before the eruption that began on April 1. As magma accumulation continues beneath Svartsengi, repeated magma intrusions and even eruptions in the Sundhnúkur crater row must be considered. The Icelandic Meteorological Office continues to monitor the development of magma accumulation and assess possible scenarios based on the latest data. Micro-earthquake activity continues near the magmatic dike that formed on April 1, with an average of about one hundred earthquakes per day in the past week. Most of the earthquakes are below magnitude 1, with the largest one recorded at magnitude 1.7 during the past week. There was also some minor earthquake activity near Fagradalsfjall last weekend. Calm weather in recent days has allowed the monitoring network to detect even the smallest earthquakes that would otherwise likely not be recorded due to weather disturbances. The hazard map has been updated and is valid until May 6, assuming no changes."}],"additional_notes":""},{"id":571,"published_at":"2025-04-30T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Around 45 earthquakes were detected in the past week, largest was a M2.9 on 26 April. Depth of the earthquakes remains unchanged where most of the events are located at around 16 - 18 km depth."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Uplift in Svartsengi continues, but the rate has significantly decreased and is now similar to the period before the eruption that began on April 1. As magma accumulation continues beneath Svartsengi, repeated magma intrusions and even eruptions in the Sundhnúkur crater row must be considered. The Icelandic Meteorological Office continues to monitor the development of magma accumulation and assess possible scenarios based on the latest data. Micro earthquake activity continues near the magmatic dike that formed on April 1, with an average of about 40-120 earthquakes per day in the past two weeks. Most of the earthquakes are below magnitude 1, with the largest one recorded at magnitude 2.0 during the past week. The hazard map has been updated and is valid until May 6, assuming no changes."}],"additional_notes":""},{"id":572,"published_at":"2025-05-07T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"In the past week about 80 earthquakes were detected, the largest was on May 5 where a M3,5 was detected without further escalation."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity around Grjótarvatn continues, in the past week about 85 earthquakes were detected. The depth of the earthquakes remains unchanged or at about 16 - 18 km depth."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Deformation data (GPS) show clear signs of ongoing uplift in Svartsengi, although its rate has slowed in recent weeks. Scientists have assessed when the likelihood of a new magma intrusion or eruption might increase. This assessment assumes that the same amount of magma must accumulate beneath Svartsengi as in previous events in the Sundhnúkur crater row. If the uplift continues at the same rate as today, the likelihood of a new dike or eruption is expected to increase as autumn approaches. However, if the rate of uplift, and thus the magma accumulation under Svartsengi, changes, it will affect this assessment. IMO is currently revising the potential scenarios and are evaluating, among other things, the amount of magma beneath Svartsengi necessary to trigger a new dike or even an eruption. Seismic activity continues along the dike that was formed on April 1, but activity has decreased since the end of the eruption. On average, several dozen earthquakes have been recorded per day over the past two weeks. The hazard assessment map has been updated and remains valid until May 20, unless changes occur. A new information update is also planned for May 20."}],"additional_notes":""},{"id":573,"published_at":"2025-05-14T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity is at a normal background level. The earthquakes that are being detected are all below M2. Deformation is still ongoing and the rate of inflow remains unchanged. In August a team of technicians are going to do a field camping doing GNSS and gas measurements, leveling and gravity survey."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismic trends show that large earthquakes (M5) occur regularly along the caldera rim. Deformation data show that inflation is continues."},{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"The deep seismicity that was detected in the beginning of April has ceased. Activity remains at a background level."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"Grímsvötn remains at a normal background level."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic activity continues. The largest earthquake was detected on 8 May and was a M3,7. The earthquakes are still at about 20 km depth. Recently a new GPS station was installed Hraunholt (HRAH). Currently there are 4 GPS stations in the area, two owned by IMO and two by LMÍ (the geological surveying of Iceland). GPS data do not show any clear indication of deviation from baseline."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Deformation data (GPS) continue to show signs of uplift in Svartsengi with a inflow rate of about 3 m3/s. Seismic activity continues to decrease in the area. If the uplift continues at the same rate as today, the likelihood of a new dike or eruption is expected to increase as autumn approaches. However, if the rate of uplift, and thus the magma accumulation under Svartsengi, changes, it will affect this assessment. Additionally Today 14 May monthly volcano monitoring meeting was held at IMO. The report includes results from that meeting."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity, GPS show no signs of uplift."}],"additional_notes":""},{"id":574,"published_at":"2025-05-21T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Continued uplift is being measured in Svartsengi, indicating ongoing magma accumulation in the area. If the rate of uplift continues at the same rate as recent days, it can be assumed that the likelihood of a magmatic dike or eruption will begin to increase as autumn approaches. However, changes in the rate of uplift—and therefore magma accumulation beneath Svartsengi—could affect this assessment. Scientists at the Icelandic Met Office continue to revise potential future scenarios that may develop from the ongoing magma accumulation in Svartsengi. Earthquake activity near the dike that formed on April 1st continues to decrease. Most of the earthquakes have occurred at the southern part of the dike, however it has steadily declined in recent days. Seismic activity in Fagradalsfjall has also decreased. The hazard assessment map has been updated and remains valid until June 3rd, unless conditions change. The next news update will also be on June 3."}],"additional_notes":""},{"id":575,"published_at":"2025-05-28T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"Very few earthquakes have been measured in the Askja region in the last week."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"A seismic swarm occurred west of Eldey on 24 May. A total of 640 earthquakes have been automatically detected in the area since then. The two largest earthquakes were M5.1 and M4.3, respectively, and were widely felt in the country. Both occurred on the same day. Intense seismicity in this area is not unusual and it has been detected often since the unrest in the Reykjanes peninsula started in 2019. Deformation data (GPS) do not show changes from the background."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity in the Grjótarvatn area continues with, on average, ten earthquakes per day at a depth of about 15-20 km. Deformation data (GPS data) do not show variations from the background."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Ground deformation in the Svartsengi area continues at stable rate, indicating magma continues accumulating at depth. The seismicity persists in the area north of Grindavík, but it is slowly reducing with time. The majority of earthquakes have small intensities (below M1). The latest news are reported here: https://en.vedur.is/about-imo/news/uplift-continues-beneath-svartsengi"}],"additional_notes":""},{"id":576,"published_at":"2025-06-04T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Uplift and magma accumulation continue beneath Svartsengi. However, the rate of magma accumulation continues to gradually decrease compared to the rates observed in April and the first half of May. If magma accumulation continues at a similar pace as in recent weeks, the likelihood of a magma intrusion or eruption is expected to increase as autumn approaches. Changes in the rate of uplift—and therefore magma accumulation—beneath Svartsengi could, however, influence this assessment. In recent days, between 10 and 20 small earthquakes have been recorded each day in the area around the dike that formed on April 1, 2025. Seismic activity has steadily decreased in recent weeks. Most of the earthquakes are concentrated in two clusters: one in the southern part of the dike near Grindavík and the other in the area between Sundhnúkur and Stóra Skógfell. Occasional earthquakes are also detected near the northern end of the dike, north of Keilir. The hazard assessment has been updated and remains unchanged. It is valid until June 18, provided no changes occur. On 31 May a small seismic swarm was detected just northeast of Eldey, About 70 earthquakes were detected. The earthquakes were all under M2.5."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"In the past week, a slowly increasing tremor has been detected on the seismometer at Grímsfjall, which indicates that water is moving within Grímsvötn or that a small jökulhlaup (glacial outburst flood) may be underway. The last Grímsvötn jökulhlaup occurred in January of this year, and in the previous instances, about a year has typically passed between floods. Since so little time has passed since the last flood, the volume of water in the area is small, and therefore this event is expected to be very minor if it is a jökulhlaup. In the case of a very small flood, it is possible that no significant changes will be detected at the hydrological stations in Gígjukvísl. It is also possible that water is moving within Grímsvötn from areas that were closed off at the end of the last flood. The ice shelf over the lakes has subsided slightly, at least in the area around the GPS station operated by the Institute of Earth Sciences at the University of Iceland. On May 29, the tremor increased, which suggests rising geothermal activity, a common occurrence associated with pressure drops caused by jökulhlaups in Grímsvötn. Water movement between areas within the lakes can also create a similar pressure drop, so this does not confirm whether a flood is occurring. Since then, the tremor has steadily declined over the weekend. Strong wind in the Grímsvötn area disrupted tremor measurements yesterday, but all available data point to this being a very minor event that has most likely already subsided."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity continues in the area around Grjótárvatn in the southeastern part of the Ljósufjöll volcanic system. About 70 earthquakes were detected in the past week, two of which where over M3. The largest was a M3.4 detected on 2 June."}],"additional_notes":""},{"id":577,"published_at":"2025-06-11T11:00:00Z","entries":[{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"Last week a slow increase in tremor was detected at few seismic stations around Grimsvötn. The most likely interpretation is that melt water has been travelling within and/or outside the subglacial lake. However, no significant changes were detected at hydrological stations. Seismic activity in Grímsvötn has been within the normal background level in the past year. Multigas measurements in Grímsvötn were conducted during the spring trip at Vatnajökull and the preliminary results indicate an apparent increase in CO2 release since 2020. A new Multigas instrument was replaced last week at Saltarinn and it is streaming data to IMO."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"About 300 earthquakes have been detected in the past month which seems more than in previous months, however an additional seismic station was installed (GST) in beginning of May. If looked at earthquakes over M1 the number of earthquakes is similar to the past months, suggesting that overall the seismicity is continuing at similar rate. No obvious deformation can be seen at the GPS stations."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Uplift and magma accumulation continue beneath Svartsengi. However, the rate of magma accumulation continues to gradually decrease compared to the rates observed in April and the first half of May. If magma accumulation continues at a similar pace as in recent weeks, the likelihood of a magmatic dike or eruption is expected to increase as autumn approaches. Changes in the rate of uplift—and therefore magma accumulation—beneath Svartsengi could, however, influence this assessment. Additionally Today 11 June the monthly volcano monitoring meeting was held at the IMO. The report includes results from that meeting."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"Since the beginning of the year there has been a general decreasing trend in the seismicity. The deformation at Askja continues at a stable rate since the last 1.5 year."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismic activity has been within normal background level in the past month. Deformation data shows continuing inflation underneath the caldera."},{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"Occasional deep earthquakes continue being detected since March 2025 at about 20 km depth."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity in Mýrdalsjökull has been very low since last autumn. As the summer is approaching potential floods and seismic swarms become more likely. That assumption is based on experiences from the past years."}],"additional_notes":""},{"id":578,"published_at":"2025-06-18T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity continues in the area around Grjótárvatn and an earthquake with magnitude M3.7 occurred on 16th of June. Earthquakes of similar size were also measured in April and May this year. GPS data do not show measurable deformation in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Ground uplift continues in the area around Svartsengi indicating that magma still accumulates at depth. The rate of magma accumulation has gradually decreased in the past weeks. If magma accumulation continues at a similar rate the likelihood of a dike or a new eruption is expected to increase as the autumn approaches."}],"additional_notes":""},{"id":579,"published_at":"2025-06-25T11:00:00Z","entries":[{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity persists in the Krýsuvík area since the unrest in the peninsula commenced in 2020. Occasionally the activity intensifies and it is characterized by short-lived seismic swarms. This is what happened on 18-19 June when more than 100 earthquakes were detected. On 18 June an earthquake M3.4 occurred and it was followed by minor aftershocks."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity in the area of Grjótarvatn continues. About 75 earthquakes were detected in the past week, with the largest event which had a magnitude M2.1."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Ground uplift continues in the area around Svartsengi indicating that magma still accumulates at depth. The rate of magma accumulation has gradually decreased in the past weeks. If magma accumulation continues at a similar rate the likelihood of a dike or a new eruption is expected to increase as the autumn approaches."}],"additional_notes":""},{"id":580,"published_at":"2025-07-02T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"- Seismic activity has been within normal background level in the past month. The largest earthquake in Bárðarbunga last week was a M3.5 the 30th of june. Deformation data shows continuing inflation underneath the caldera."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"- Around 30 earthquakes were detected in Katla in the past week, the largest earthquake was a M3.0 on the 30th of June. During summer potential floods and seismic swarms become more likely in the glacier covered volcano. That assumption is based on experiences from the past years."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"- Deep seismic activity continues by Grjótárvatn at around 15-30 km depth. Last week around 70 earthquakes were detected in the area, with the largest event at M3.0 the 27th of June. The most likely explanation for this seismic activity is believed to be magma intrusion at depth rather than tectonic movements. However, current monitoring data show no indications that magma is moving towards the surface."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"- GPS deformation data indicates ongoing uplift in Svartsengi. Scientists at the Icelandic Meteorological Office believe the chances of a magma intrusion or eruption will increase in autumn if the magma accumulation persists. Seismic activity has remained relatively stable in recent weeks, with about 10 micro-earthquakes (below M2.0) per day on average."}],"additional_notes":""},{"id":581,"published_at":"2025-07-09T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismic activity has been within normal background level in the past month. The largest earthquake in Bárðarbunga last week was M3.6 on July 4th. Deformation data shows continuing inflation underneath the caldera."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"A small seismic swarm occurred west of Eldey on July 7th. A total of 65 earthquakes were detected in the area. The largest earthquakes were in the range of M3.0 and M3.2. Intense seismicity in this area is not unusual and it has been detected often since the unrest in the Reykjanes peninsula started in 2019. Deformation data (GPS) do not show changes from the background."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"More than 150 earthquakes were detected in Katla in the past week, the largest was M2.5 on July 8th. During summer, potential floods and seismic swarms become more likely in the glacier covered volcano. That assumption is based on experience from the past years. Increased conductivity has been observed in some rivers around the glacier in the last few days due to a leak of geothermal water."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Deep seismic activity continues by Grjótárvatn at around 15-30 km depth. Last week around 60 earthquakes were detected in the area, with the largest event at M2.7 July 6th. The most likely explanation for this seismic activity is believed to be magma intrusion at depth rather than tectonic movements. However, current monitoring data show no indications that magma is moving towards the surface."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"GPS deformation data indicates ongoing uplift in Svartsengi. Scientists at the Icelandic Meteorological Office believe the chances of a magma intrusion or eruption will increase in late summer or autumn if the magma accumulation persists. Seismic activity has remained relatively stable in recent weeks, with about 10-20 micro-earthquakes (below M2.0) per day on average."}],"additional_notes":""},{"id":582,"published_at":"2025-07-16T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":0,"status_text":"Today 16 of July at 00:00 UTC a seismic swarm began on Sundhnúkur crater row, about 4 hours later an effusive eruption started from a 500-700 m long eruptive fissure located NE of Mt Stóra-Skógfell, in a similar location as the August 2024 eruption. First visual estimate of initial effusion rate is 500-700 m3/s, considerably lower than has been observed in some of the previous eruptions in the area. However, the eruptive fissure continued to lengthen towards NE and was estimated about ~2 km long two hours into the eruption (at 6:00 UTC) and extending to roughly ~2.5 km at 11 UTC. Lava flows towards east and west, moss fires have started. IMO monitors the area and lava flow advances closely. About 600 earthquakes have been detected since midnight, however the seismicity has decreased significantly since 6:00 UTC."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"On 8 July a glacial outburst flood (jökulhlaup) began from Mýrdalsjökull, likely originating from geothermal cauldrons south of Austmannsbunga. Water levels and conductivity in Leirá Syðri and Skálm began rising on July 8, with the flood peaking in Leirá Syðri on the evening of July 9 and in Skálm early on July 10. By July 11, measurements showed a clear decline in both rivers, with values approaching normal background level with the flood ending on July 11. Minor seismicity followed the flood, the largest earthquakes was a M2.7 on 10 July."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity around Grjótarvatn, about 50 earthquakes were detected in the past week."}],"additional_notes":""},{"id":583,"published_at":"2025-07-23T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"On 16 July two earthquakes over M3 were detected without further escalation, the larger was a M3.1."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"The water level and conductivity in Leirá syðri and Skálm began rising around 4 AM on the morning of July 21. The peak appears to have been reached around 11 PM that same evening. Since then, conductivity has been decreasing. The water level in Leirá is now declining, while in Skálm it remains elevated, which may be due to increased precipitation in the area. The last flood event in Leirá and Skálm occurred on July 9 and lasted several days. It appears that the geothermal leak responsible for that event has now ended. geothermal leaks of this type have occurred from Mýrdalsjökull several times before. A similar leak was observed in September following the jökulhlaup (glacial outburst flood) on July 27, 2024."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":0,"status_text":"The effusive eruption which commenced on 16 July in Sundhnúkur crater row continues. The activity is now confined to one crater at the center of the ~2,5 km long fissure that opened on 16 July. The lava continues to thicken and flow slowly eastward into Fagridalur, although the advance is very gradual. Volcanic tremor is gradually decreasing with intermittent fluctuations due to crater rim build-up. Seismic activity remains low in the area. Ground deformation observations (GPS and InSAR) currently show no indication of either uplift or subsidence in the vicinity of Svartsengi, suggesting that the magma currently reaching the surface is sourced from a deeper level within the crust rather than the shallower accumulation zone beneath Svartsengi. Due to shifting wind directions across the country, the dispersion of volcanic gases is difficult to predict with precision. However, the IMO's gas dispersion forecast shows that SO₂ pollution is expected to drift eastward and northeast in the coming days, potentially affecting large parts of South and East Iceland.The volcanic haze is forecast to spread over much of the country, covering South, East, and West Iceland. Pollution could also reach the UK in the coming days. A low-pressure trough is currently over the country, resulting in variable wind directions, although westerly winds dominate in the southwest. Fog and drizzle are expected on the coast. Precipitation may help reduce the pollution caused by the eruption. The hazard map has been updated and is valid until July 25 unless conditions change. The hazard level is currently assessed as low (green) across parts of the southern Reykjanes Peninsula. Weather forecasts suggest that winds during the validity period will carry volcanic gases and ash away from this region. This update does not affect hazard levels within monitoring zones, where the hazard is still considered moderate (yellow). An M3.5 earthquake was detected west of Kleifarvatn, several small earthquakes followed. The activity is likely triggered earthquakes due to the eruption."}],"additional_notes":""},{"id":584,"published_at":"2025-07-30T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity at Askja has been relatively low in the past week."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"In the past week the level of seismicity at Bárðarbunga has been relatively low, however on 27 July a M5.2 earthquake occurred on the SE of the caldera rim. Few aftershocks did occur in the following hour. Earthquakes above M5 are recorded regularly at Bárðarbunga, last one occurred in May this year. Inflation at Bárðarbunga continues reflecting magma recharging at depth."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity at Grjótarvatn continues at rather stable rate. The majority of the earthquakes have intensities below M2, but on 29 July a M3.2 earthquake occurred in the area. Earthquakes of this intensity are not common for the Grjótarvatn region, but they have became more frequent since the end of 2024. As of today, ten earthquakes above M3 have been registered since the beginning of the unrest in this area in 2024 and they likely reflect on an increase in pressure at depth due to magma accumulation. The depth of the seismicity is unchanged with time and remains centered around 15-20 km. GNSS stations in the area do not show evidences of deformation."},{"volcano_code":"REY","vona_color_code":"ORANGE","vals_level":0,"status_text":"The eruption at the Sundhnúkur crater row continues with steady lava flow from the main crater toward the east and southeast. A new crater has formed inside the main crater, and activity is now limited there. A small opening formed on 28 July on the western side of the crater but closed again 29 July. Deformation observations (GNSS and InSAR) show signs of renewed uplift beneath the Svartsengi area. Currently, these displacements are very small, registering a total uplift of less than 2 cm over the past week. Further measurements within the coming week will confirm whether uplift at Svartsengi continues."}],"additional_notes":""},{"id":585,"published_at":"2025-08-06T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"On Monday 5 August the activity in the crater came to a complete stop alongside decreasing tremor and the eruption is now considered over. Uplift has resumed, according to satellite and GNSS measurements, by approximately 2–3 centimeters. This confirms that magma is still accumulating beneath Svartsengi, and if uplift continues, it could lead to new magma intrusions and future eruptions. No significant changes have occurred in the extent of the lava field in recent days, but it remains unstable. This can result in sudden advances at the lava front. In such cases, the surface of the edge may collapse without warning and a glowing lava tongue may surge forward. These surges are life-threatening, and it is essential to keep a safe distance from the edge. This hazard remains even though the eruption has ended. Gas pollution from the eruption has been low in the area over the past two days, and no volcanic haze has been detected. However, even though crater activity has ceased, there is still a possibility of volcanic haze appearing—sometimes for several days after an eruption ends. A new hazard map has been issued and will remain in effect for the coming week. The map reflects that the eruption has ended, but hazards due to the newly formed lava and potential gas pollution remain present. Additional information are available at the following link: https://en.vedur.is/about-imo/news/a-magma-instrusion-has-started-on-sundhnuksgigarod-crater-row"},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity at Krýsuvík volcanic system has been quite intense since the volcanic unrest started in the Reykjanes peninsula. After the magmatic dike and eruption which occurred on 16 July at the Sundhnúksgígar Crater row west of Krýsuvík, the seismicity has slightly increased with, on average, 20 earthquakes per day. The majority of the earthquakes has magnitude below M2 and they occur at a depth of 4-5 km. This seismicity is considered to reflect the response of the crust to the stress induced by the dike emplacement which occurred on 16 July, however other causes cannot be excluded. Further analysis of seismic and deformation data are needed to understand if another potential cause is the presence of magma (or magma movement) at depth."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity at Grjótarvatn continues in a rather stable way. The past week, on average, have been recorded 10 earthquakes per day. The majority of these earthquakes had magnitude below M1 and all of them occurred at a depth between 15-20 km."}],"additional_notes":""},{"id":586,"published_at":"2025-08-13T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity was above background level in July most likely related to glacial outburst floods on 9. - 11. July and then again smaller events in end of July and beginning of August. This activity is not unusual and considered normal during the summer period."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"The uplift in Askja continues, since late 2021, however at a slightly lower rate since summer 2024, according to GNSS and recent levelling measurements on site. Seismic activity remains at a normal background level. Recent geochemical measurements in the area do not reveal changes from previous years."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The uplift in Bárðarbunga continues, however at a slightly higher rate for the last year. Seismic activity remains at a normal background level with occasional larger earthquakes (>M5), last one occuring on 27 July in the SE part of the caldera."},{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"Slightly increased seismic activity in Eyjafjallajökull since March 2025. Since then minor swarms of deeper earthquakes have occasionally been detected. Last events like that occured on 2 and 6 July when about 7 earthquakes were detected in few hours at about 24-27 km depth."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity remains at a normal background level."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":0,"status_text":"Slightly increasing seismicity in the past years with most earthquakes detected in Desember 2024. The activity in the past months has however been decreasing."},{"volcano_code":"KRA","vona_color_code":"GREEN","vals_level":0,"status_text":"Yearly geochemical campaign measurements were performed recently. The results are consistent with previous years, no changes to report."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity continues associated with ongoing unrest on the Reykjanes peninsula."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity, the depth remains at 15-20 km depth. Largest earthquakes that have been detected since the beginning of the activity in May 2021 are M3.7 in April, May and June 2025. GNSS measurements and recent interferograms do not detect deformation in the area. However, the most likely cause of this activity is magma accumulation at depth."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Since the end of tha last eruption on 5 August the uplift in Svartsengi continous at rather stable rate. Seismic activity in the area is very low."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"Yearly geochemical campaign measurements were performed recently. The results are consistent with previous years, no changes to report."},{"volcano_code":"VES","vona_color_code":"GREEN","vals_level":0,"status_text":"Yearly geochemical campaign measurements were performed recently. The results are consistent with previous years, no changes to report. Additionally Today 13 August the monthly volcano monitoring meeting was held at the IMO. The report includes results from that meeting."}],"additional_notes":""},{"id":587,"published_at":"2025-08-20T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Magma accumulation continues beneath Svartsengi at a rate similar to that before the last eruption. No seismic activity has been detected in the area since the eruption began. The hazard map for the area has been updated and is valid until 2 September unless conditions change. The main update is that the new lava field has been downgraded to the “moderate hazard” category (yellow), the same as older lava fields On Reykjanes ridge a M3.1 was detected on 19 August with few aftershocks recorded."},{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":0,"status_text":"A M3.2 earthquake struck southwest Iceland shortly after 18:00 UTC on 18 August and it was felt in the capital area. The earthquake was located in Brennisteinsfjöll, an active seismic zone. Since the onset of activity on the Reykjanes Peninsula in 2020, seismicity in this area has increased, reflecting growing stress accumulation in the crust. It should be noted that large earthquakes recur in this region, although at long intervals, and it is uncertain when the next might occur. The last major events were M6.4 in 1929 and M6.1 in 1968. Since then, building standards have steadily improved with stricter requirements for earthquake-resistant design. While earthquakes of this size can trigger rockfalls in steep slopes and cause household items to shift, injuries in Iceland are rare and most often result from unsecured objects falling during shaking."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity near Kleifarvatn continues. Krýsuvík and nearby areas are historically known for earthquakes, but recent activity is mainly linked to intrusion-related earthquakes beneath Fagradalsfjall and Sundhnúkur. Ground deformation at Krýsuvík is now confirmed by both GNSS and satellite data. The current signal indicates subsidence in the area where the current seismicity is occurring. At Krýsuvík, both uplift and subsidence have been regularly measured for many decades, however the current deformation appears faster than previously observed. Further analysis is underway."},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":0,"status_text":"On 17 August a M3.3 earthquake was measured about 4.5 km northeast of Langjökull, a few aftershocks followed."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity in the area of Grjótarvatn."}],"additional_notes":""},{"id":588,"published_at":"2025-08-27T11:00:00Z","entries":[{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity in the area west of Kleifarvatn. About 100 earthquakes were detected."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Uplift continues in Svartsengi area, no seismicity has been detected in the past week."}],"additional_notes":""},{"id":589,"published_at":"2025-09-03T11:00:00Z","entries":[{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity near Kleifarvatn continues, the largest earthquake was a M3,1 on 30 August. The earthquake was felt in the capital area. GNSS continue to shows subsidence in the area where the current seismicity is occurring. At Krýsuvík, both uplift and subsidence have been regularly measured for many decades, however the current deformation appears faster than previously observed. Further analysis is underway."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity in the area of Grjótarvatn."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Magma accumulation continues beneath Svartsengi at a rate similar to that before the last eruption. Minor seismic activity has been detected in the area since 16 July. The hazard map has been updated where the main change is the polygon for Vogar has change from a box to a outline of the town. The map is valid until 16 September. A M3,3 was detected just west of Reykjanestá in a small seismic swarm on 31 August."}],"additional_notes":""},{"id":590,"published_at":"2025-09-10T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity remains at a normal background level. Uplift continues at a stable rate."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The uplift in Bárðarbunga continues. Seismic activity has been lower in the past months, the largest earthquake since last week was a M3.7 on 4 September."},{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity in the past week has been low, only one earthquake was detected, a M2.2 on 4 September. Last time a M2 earthquake was detected was in March 2024."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Two M3 earthquakes detected on 6 September. Their location correspond to two well known cauldrons within the caldera."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity west of Kleifarvatn. Largest earthquake was a M3.6 which occurred on 5 September. GPS and InSAR data confirm the ongoing rapid deflation. Geochemical data will be acquired in the coming weeks to investigate changes in the geothermal system."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity, the depth of the earthquakes remains at 15-20 km. GPS data do not show evidences of deformation in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Uplift and magma accumulation beneath Svartsengi continues and the rate of accumulation has been steady in recent weeks. Model calculations estimate that around 6 to 7 million cubic meters of magma have accumulated beneath Svartsengi since the eruption that began on 16 July. The volume of magma released from the storage area beneath Svartsengi during that eruption is estimated at around 12 million cubic meters. Based on experience from eruptions on the Sundhnúkur crater row, it is expected that the probability of a new dike intrusion and eruption increases once approximately the same volume of magma has accumulated beneath Svartsengi as was released in the previous event. Looking at the most recent eruption, this suggests that once 12 million cubic meters have built up again, the probability of a new event will rise. At the current rate of accumulation, this volume will be reached in the latter half of September. Additionally Today 10 September the monthly volcano monitoring meeting was held at the IMO. The report includes results from that meeting."}],"additional_notes":""},{"id":591,"published_at":"2025-09-17T11:00:00Z","entries":[{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"A small seismic swarm was detected on Reykjanes ridge, about 40 km from Reykjanestá, on 12 September. The largest earthquake was a M4."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity, with about 280 earthquakes detected. GPS and InSAR measurements show continued subsidence in the area."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity, though at a slightly lower rate than previous months."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Measurements show that magma accumulation beneath Svartsengi continues at a similar rate as in recent weeks. Model calculations estimate that about 9 million cubic meters of magma have accumulated since the last eruption, which began on 16 July. The volume that drained from the accumulation area in that eruption was estimated at around 11-13 million cubic meters. Based on previous events in the Sundhnúkur crater row, the likelihood of a new dike intrusion and eruption increases once a similar volume of magma has accumulated beneath Svartsengi as drained during the last event. If the accumulation rate remains unchanged, this volume will be reached by the end of September. However, experience shows that the thresholds for when an eruption begins vary between events. The uncertainty in the timing of the next event is therefore considerable and the current magma accumulation period may be prolonged. The hazard map remains unchanged for one week. Given that the same volume of magma as was released in the last eruption is expected to be reached by the end of September, the hazard map will be revised next week."}],"additional_notes":""},{"id":592,"published_at":"2025-09-24T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"M3.9 on 19 September without further escalation."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity and subsidence in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Uplift and magma accumulation continue at a steady rate under Svartsengi, Since the last eruption, which began on 16 July, about 10 million cubic meters of magma have reaccumulated beneath Svartsengi.Based on previous events in the Sundhnúkur crater row, the likelihood of a new dike intrusion and eruption increases once a similar volume of magma has accumulated beneath Svartsengi as drained during the last event. The volume that drained from Svartsengi area during that eruption is estimated at about 11–13 million cubic meters. If the accumulation rate remains unchanged, the lower threshold of this volume will be reached over the next weekend. Therefore, the hazard assessment will remain unchanged until this lower threshold is reached and will be updated on Thursday, 25 September."}],"additional_notes":""},{"id":593,"published_at":"2025-10-01T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"A M3.2 was detected on 25 September without further escalation."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity and subsidence in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Uplift and magma accumulation continue at a steady rate under Svartsengi. Since the last eruption, which began on 16 July, more than 11 million cubic meters of magma have reaccumulated beneath Svartsengi. Based on previous events in the Sundhnúkur crater row, the likelihood of a new dike intrusion and eruption increases once a similar volume of magma has accumulated beneath Svartsengi as drained during the last event. The volume that drained from Svartsengi area during the last eruption is estimated to be about 11–13 million cubic meters. Based on geodetic modelling, the lower threshold was reached on 27 September and the upper bound is expected to be reached by 18 December. An eruption may occur any time after this lower bound is reached. This forecast will change based on variations in the magma inflow rate and will be updated accordingly. As in previous events a short-term forecast will be issued as soon as the real-time IMO monitoring network detects new activity indicative of a dike propagation and magma movement. On 25 September, the IMO decided to increase the volcano alert level for Reykjanes-Svartsengi from VALS=1 to VALS=2 and, accordingly, the hazard assessment for the area has been re-evaluated and elevated."}],"additional_notes":""},{"id":594,"published_at":"2025-10-08T11:00:00Z","entries":[{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity was low in September, when two earthquakes were detected. The larger earthquake was M2.2 at 3 km depth. Earthquakes above M2 are not common in Eyjafjallajökull, and the last one occurred in November 2023 and before that in April 2017. Only few earthquakes have been detected in Eyjafjallajökull since July, but occasional small clusters of deep earthquakes (below 20 km) were detected from March to July this year."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity in Grímsvötn was within background levels in September. During the last week in September increased conductivity was measured in Gígjukvísl river and an increased tremor for few days at Grímsvötn followed. That indicates that a minor glacial flood occurred from Grímsvötn. Last significant flood occurred in January this year, and another minor flood in the end of May."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Slight increase in seismic activity has been recorded since July in Katla. That is not unusual and is common during the summer period when glacial flood events are more common. One significant flood event occured from Mýrdalsjökull in early July and since then at least five minor events have been recorded."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued seismic activity west of Kleifarvatn. Nearly 900 earthquakes were detected there in September, with few earthquakes above M2 and the largest one M3.6 on 5 September. Most days between 10 and 40 earthquakes are detected but some days close to 100 earthquakes were recorded. GPS and InSAR data confirm the ongoing rapid deflation since early summer. Work is ongoing to increase the geochemical monitoring in the area to investigate changes in the geothermal system."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity in the area near Grjótárvatn continues at a similar rate. On 2 October a swarm of around 50 earthquakes was detected with four earthquakes between M3.2 and M3.5. The seismicity remains at depth between 15 and 20 km. GPS data do not show evidences of deformation in the area. Even though no deformation has been detected at the surface the most likely interpretation of this activity is magma accumulation at 15 - 20 km depth in the crust."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"Uplift and magma accumulation beneath Svartsengi continues. Around 12 million cubic meters of magma have reaccumulated beneath Svartsengi since the last eruption, which began on 16 July. Based on previous events in the Sundhnúkur crater row, the likelihood of a new dike intrusion and eruption increases once a similar volume of magma has accumulated beneath Svartsengi as drained during the last event. The volume that drained from Svartsengi area during the last eruption is estimated to be about 11–13 million cubic meters. Analysis of past events has enabled an estimate of the likely volume range required to trigger the next diking event/eruption. The lower bound of 11 million cubic meters was reached on 27 September and the upper bound of 23 million cubic meters, is assessed to be reached in the second part of December. An eruption may occur any time after this lower bound is reached. This forecast will change based on variations in the magma inflow rate and will be updated accordingly. As in previous events a short-term forecast will be issued as soon as the real-time IMO monitoring network detects new activity indicative of a dike propagation and magma movement On 25 September, the IMO decided to increase the volcano alert level for Reykjanes-Svartsengi from VALS=1 to VALS=2 and, accordingly, the hazard assessment for the area has been re-evaluated and elevated. Current Hazard assesment is valid until 14 October, if no changes in activity. Additionally Today 8 October the monthly volcano monitoring meeting was held at the IMO. The report includes results from that meeting."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity remains at a normal background level and uplift continues."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Around 60 earthquakes were detected in Bárðarbunga volcano in September. That is similar to previous months but slightly less than during the first months of 2025. The largest earthquakes in September were M3.9 and M3.7. The uplift continues in Bárðarbunga volcano, at a slightly higher rate since early 2024 compared to the years before that."}],"additional_notes":""},{"id":595,"published_at":"2025-10-15T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"A M4 and M3.3 were detected on 12 October without further escalation."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity continues near Krýsuvík, with numerous small earthquakes detected daily. Ground subsidence also continues in the area, amounting to approximately 50 mm at the Móhálsadalur GPS station since early June."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":0,"status_text":"Continued deep (15-20 km) seismic activity, with just over 30 earthquakes detected last week and the largest on M2.7."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":0,"status_text":"A short-lived micro-earthquake swarm was recorded east of Sýlingarfell on Saturday evening. The activity lasted about one hour before subsiding. No significant changes were observed in GPS measurements, fiber-optic strain data, or borehole pressure in Svartsengi during the swarm. Similar micro-earthquake swarms have been observed a few weeks before previous eruptions along the Sundhnúkur crater row, for example in May and November 2024. Increased seismic activity of this type indicates rising pressure in the magma accumulation zone, though the exact timing of the next event remains uncertain. Deformation measurements in recent weeks show that uplift and magma accumulation continue beneath Svartsengi. When looking at the rate of uplift over several weeks, there are indications that the rate has decreased slightly. Since the last eruption, which began on 16 July, between 12 and 13 million cubic meters of magma are estimated to have re-accumulated beneath the Svartsengi magma accumulation zone. Based on previous events along the Sundhnúkur crater row, the likelihood of a new dike propagation or eruption increases once a similar amount of magma has accumulated as was released in the last event. The volume of magma that left the system during that eruption is estimated at 11–13 million cubic meters, and the lower limit of that range was reached in the end of September. Analysis of previous events has enabled IMO's specialists to estimate the range of accumulated magma volumes that could trigger the next intrusion or eruption. The upper limit of that range is estimated at about 23 million cubic meters, which, according to model calculations, would be reached by late December, assuming the current accumulation rate remains steady. There is therefore still considerable uncertainty regarding the timing of the next event. The hazard map for the Reykjanes–Svartsengi area has been reviewed and remains unchanged until 28 October, unless new activity warrants an update."}],"additional_notes":""},{"id":596,"published_at":"2025-10-22T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Uplift and magma accumulation beneath Svartsengi continues. Between 13-14 million cubic meters of magma have reaccumulated beneath Svartsengi since the last eruption, which began on 16 July. Based on previous events along the Sundhnúkur crater row, the likelihood of a new magma intrusion or eruption increases once a similar amount of magma has accumulated as was released in the last event. The volume of magma that left the system during that eruption is estimated at 11–13 million cubic meters, and the lower limit of that range was reached around end of September. Analysis of previous events has enabled the IMO to estimate the range of accumulated magma volumes that could trigger the next intrusion or eruption. The upper limit of that range is estimated at about 23 million cubic meters, which, according to model calculations, would be reached by late December, assuming the current accumulation rate remains steady. There is therefore still considerable uncertainty regarding the timing of the next event. Seismicity has been low in the area in the past week. The hazard map remains unchanged until 28 October, unless the activity changes."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Around noon on 20 October a seismic swarm was detected in Katla with about 60 earthquakes detected. Five earthquakes were measured over M3, the largest a M4,5. The swarm subsided in the evening of 20 October without further escalation. Similar swarms were last detected in Katla In May and June 2023."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity continues near Krýsuvík, with numerous small earthquakes detected daily, one earthquake measured at M3 was detected on 22 October. Ground subsidence also continues in the area."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Continued deep (15-20 km) seismic activity, with just over 30 earthquakes detected last week and the largest on M2.7."}],"additional_notes":""},{"id":597,"published_at":"2025-10-29T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"A M3.1 was detected on 22 October without further escalation."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"A M3.2 was detected on 29 October without further escalation."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Earthquake activity near Krýsuvík continues, with numerous small earthquakes recorded daily. On October 22, two earthquakes larger than magnitude 3 occurred west of Kleifarvatn, measuring M3.1 and M3.6. On that day, over 120 earthquakes were recorded in the area. Subsidence, observed since the summer, also continues in the region, amounting to about 55 mm at the Móhálsadalur GPS station west of Kleifarvatn since early June. However, the rate of subsidence has decreased in recent weeks."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Continued deep (15-20 km) seismic activity, with just over 40 earthquakes detected last week and the largest one a M2."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"About 14 million cubic meters of magma have accumulated beneath Svartsengi since the last eruption. Based on previous events in the Sundhnúkur crater row, the likelihood of a new magma intrusion and eruption increases once a similar volume of magma has recharged beneath Svartsengi as was released during the last event. Looking at eruptions in the Sundhnúkur crater row since March 2024, the amount of magma that was released from Svartsengi each time has varied considerably — from 12 million to 31 million cubic meters. Therefore, there is still considerable uncertainty about the exact timing of the next event Seismic activity near Grindavík and the Sundhnúkur crater row remains rather low, with only occasional small earthquakes of around or just above magnitude 1.0 being recorded. Most of these are located between Hagafell and Grindavík. A short swarm of small earthquakes occurred along the Sundhnúkur crater row on October 11th, when just over 20 earthquakes were detected. However since then, only few earthquakes have been detected each day in the area. The Icelandic Meteorological Office's hazard assessment has been updated and will remain unchanged until November 11, unless activity changes."}],"additional_notes":""},{"id":598,"published_at":"2025-11-05T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"A M5.4 was detected on 29 October without further escalation. In the past year 4 earthquakes above M5 have been detected."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Earthquake activity near Krýsuvík continues, with numerous small earthquakes recorded daily. Last week about 100 earthquakes were detected and the largest measured was a M2.1 on 31 October."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Continued deep (15-20 km) seismic activity, with about 40 earthquakes detected last week and the largest one a M2.2."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Magma accumulation beneath Svartsengi continues, about 15 million cubic meters of magma has accumulated since the last eruption. Based on previous events in the Sundhnúkur crater row, the likelihood of a new magma intrusion and eruption increases once a similar volume of magma has recharged beneath Svartsengi as was released during the last event. Looking at eruptions in the Sundhnúkur crater row since March 2024, the amount of magma that was released from Svartsengi each time has varied considerably — from 12 million to 31 million cubic meters. Therefore, there is still considerable uncertainty about the exact timing of the next event. Seismic activity near Grindavík and the Sundhnúkur crater row remains rather low, with only occasional small earthquakes. The hazard assessment remains unchanged until November 11, unless activity changes."}],"additional_notes":""},{"id":599,"published_at":"2025-11-12T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"M3.5 earthquake occurred on 9 November without further escalation. Earthquake of similar magnitude was latest detected in November 2024. Long-term deformation in the area continues without significant changes."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Deformation measurements indicate ongoing uplift and magma accumulation beneath Svartsengi, although the rate of magma inflow is gradually decreasing. Based on previous events on the Sundhnúkur crater row, the likelihood of a new magma intrusion and eruption increases when a comparable amount of magma has accumulated beneath Svartsengi as before the last eruption. The amount of magma that has drained from Svartsengi during eruptive episodes since March 2024 has varied, ranging from 12–31 million cubic meters. According to model calculations, about 15 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July. Therefore, there is still considerable uncertainty about when the next event will occur. As inflow decreases, the timeframe for a possible next event has lengthened. The accompanying graph shows that the lower volume threshold was reached in early October, while the upper threshold is projected to be reached in early February, assuming inflow remains unchanged. The upper threshold is set at 23 million cubic meters of magma, which is the average amount that has drained from Svartsengi during the last five eruptions. The hazard map has been updated and remains unchanged until November 25. The Icelandic Meteorological Office continues to monitor developments closely and will update information if changes occur. Additionally Today 12 November the monthly volcano monitoring meeting was held at the IMO. The report includes results from that meeting."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Long-term inflation continues at a stable rate alongside with high rate of seismicity. Close to 200 earthquakes were detected in October the largest one M5.4 on 29 October."},{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"No further deep seismicity detected since July 2025."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"All monitoring data show values within normal background levels in October."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":0,"status_text":"All monitoring data show values within normal background levels in October."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":0,"status_text":"New GPS and Seismic monitoring stations were installed in the area this fall. No significant changes have been observed in the area in the past month."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"After the increase in seismicity and the occurrence of minor flood events in late October nothing unusual has been detected. Seismic activity for the past couple of months has been considered just above normal background levels."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"Deformation measurements show that the subsidence that began in Krýsuvík this summer has slowed significantly, and deformation is now minimal in the area. Earthquakes in Krýsuvík still occur a few times per day, but activity has decreased substantially. The total number of earthquakes has dropped from 250 down to 100–150 per week. This is the first time since summer that the earthquake pattern shows a continuous decline."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Deep seismicity continues at a stable rate. Even though no deformation has been detected at the surface the most likely interpretation is magma accumulation at depth."}],"additional_notes":""},{"id":600,"published_at":"2025-11-19T11:00:00Z","entries":[{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity west of Kleifarvatn continues, but it is slowly reducing with time. Similarly, according to GNSS data, the deflation that was ongoing in the same region for the past months has stopped."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Slightly more than 60 earthquakes have been detected in Grjótarvatn in the past week. The trend of the seismicity is overall constant with time and the depth remains stable at about 15-20 km. No significant changes since the past month."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"A seismic swarm commenced on 18 November along the plate boundary, specifically in the area between Eldey and Reykjanesstá. A total of 220 earthquakes has been detected with the largest event of M2.8. The depth of the seismicity is not very well constrained but it appears to be at about 7-8 km. It cannot be excluded this is related to magma moving at depth, however the GNSS stations in the area do not show relevant changes from the background. Seismic sequences are common in the plate boundary, with the most recent one in August and April 2025 as well as December 2024, that lasted from hours to days. Larger earthquakes (~M5.5) may occur in connection with the ongoing sequence, and, while they would be widely felt in Reykjanes, their effects will be quite localized offshore."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Uplift in Svartsengi continues and it is assessed that about 15 million m3 of magma have recharged within the magma region since the last eruption which commenced on 16 July. The level of seismicity remains at low level with only few sporadic earthquakes detected in the Sundhnúkur area. The Volcano Alert Level for Reykjanes-Svartsengi remains at level 2 (Orange): https://en.vedur.is/about-imo/news/earthquake-in-brennisteinsfjoll-faster-subsidence-in-krysuvik-and-continued-magma-accumulation-at-svartsengi"}],"additional_notes":""},{"id":601,"published_at":"2025-11-26T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"A M3 earthquake was detected on 21 November without further escalation."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity west of Kleifarvatn continues to slowly reduce and GNSS data show the deflation in the area has stopped."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About 40 earthquakes were detected in the past week. The trend of the seismicity is overall constant with time and the depth remains stable at about 15-20 km even though amount of earthquakes per week is variable."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Uplift and magma accumulation beneath Svartsengi continues. The rate of magma inflow has remained relatively stable over the past two weeks. Modelling results indicate that approximately 16–17 million m³ of magma has accumulated beneath Svartsengi since the last eruption in July. The amount of magma that intruded from Svartsengi into the Sundhnúkagígar crater row during the eruption that began on 16 July was estimated to be around 11–13 million m³. Based on earlier eruptions along the Sundhnúkagígar crater row, the likelihood of a new magma intrusion and eruption is thought to increase once roughly the same volume of magma has reaccumulated beneath Svartsengi as was withdrawn during the preceding event. In early October, modelling results indicated that about 11 million m³ of magma had reaccumulated beneath Svartsengi. At that time, a period began— and it is still ongoing—during which the likelihood of a new magma intrusion and eruption is considered elevated. In the lead-up to eruptions along the Sundhnúkagígar crater row, the rate of magma accumulation has varied. The current magma inflow into the storage area beneath Svartsengi is estimated at around 1 m³/s. Modelling of geodetic data shows that the overall inflow rate has gradually decreased over time since the start of the activity in 2023. The slower the accumulation, the more difficult it becomes to estimate the timing of the next eruption. Based on current knowledge of the eruptions along the Sundhnúkagígar crater row, it is not possible to predict the timing of the next event with accuracy greater than a few months. Experience from recent events has also shown that the accumulation rate does not need to change much for the timing of the next possible eruption to shift by several weeks. Uncertainty in the timing of the next event is therefore considerable, and the current magma accumulation period could continue for an extended time. Looking at eruptions along the Sundhnúkagígar crater row since March 2024, the upper bound volume of magma withdrawn from Svartsengi during each event is estimated to be about 23 million m³. Assuming the current accumulation rate remains unchanged, this volume would be reached in early February 2026. Overall the seismic activity continues to be low at Svartsengi and Grindavík. The hazard map remains unchanged until 9 December. The Icelandic Meteorological Office will continue to monitor developments closely and update the assessment if changes occur in activity."}],"additional_notes":""},{"id":602,"published_at":"2025-12-03T11:00:00Z","entries":[{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"No seismicity has been detected in November and no deep seismicity has been detected since July."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"All monitoring data show values within normal background levels in November."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity has been at a normal background activity in November."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Gradual increase in seismicity since 2023. A new geothermal cauldron was discovered in the NE of the caldera rim during a field campaign conducted in the fall. A recent satellite image confirms the extension of the cauldron and it ellipsoidal shape. This most likely reflects an increase in geothermal activity under the volcanic system as confirmed by unusual increase in electrical conductivity measurements along the rivers north of Hofsjökull since summer 2025."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity for the past couple of months has been considered just above normal background levels, however November has been at a normal background level. Some spikes in electrical conductivity and in gas concentrations have been detected in Múlakvísl river and in Láguhvolar in November, which were most likely related to geothermal leakage from the glacier."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity west of Kleifarvatn continues to slowly reduce and GNSS data show the deflation in the area has stopped."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Continued seismic activity at about 20 km depth. Seismicity has been slowly decreasing over time in the past 5 months. No deformation is detected in the area."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"About 25 earthquakes were detected in November, largest a M3.5 on 9 November located 3,8 km north of lake Askja. Long-term deformation in the area continues without significant changes."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Long-term inflation continues at a stable rate alongside with high rate of seismicity. Close to 30 earthquakes were detected in November two earthquakes over M3 were detected, the largest one M3.2 on 8 November."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Uplift and magma accumulation beneath Svartsengi continues. The rate of magma inflow has remained relatively stable over the past three weeks. Modelling results indicate that approximately 18 million m³ of magma has accumulated beneath Svartsengi since the last eruption in July. An eruption is still considered the most likely scenario to occur within a time period spanning until February 2026. The most recent news is available at the link: https://en.vedur.is/about-imo/news/earthquake-in-brennisteinsfjoll-faster-subsidence-in-krysuvik-and-continued-magma-accumulation-at-svartsengi On Reykjanes ridge about 300 earthquakes were detected, most earthquake came in a short lived swarm from 18-19 November. Largest earthquake in the past week was a M3.3 on November 28. Additionally Today 3 December the monthly volcano monitoring meeting was held at the IMO. The report includes results from that meeting."}],"additional_notes":""},{"id":603,"published_at":"2025-12-10T11:00:00Z","entries":[{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity west of Kleifarvatn continues to slowly reduce and GNSS data show the deflation in the area has stopped."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Continued seismic activity at about 20 km depth. Seismicity has been slowly decreasing over time in the past 5 months. No deformation is detected in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift and magma accumulation continues at Svartengi. The magma inflow rate has been rather stable over the past few weeks and it is estimated to be about 1 m³/s. Since 16 March 2024, observations indicate that the volume required to trigger a new diking event/eruption has been variable from time to time. According to model calculations, more than 17 million cubic metres of magma have now recharged beneath Svartsengi since the last eruption in July, which is a similar to the amount which had accumulated prior to the May 2024 eruption. Therefore the likelihood of a magma migration event and an eruption remains elevated in the coming weeks. The area is characterized by low seismicity; on most days only a few small earthquakes are detected between Hagafell and Grindavík. The hazard assessment map remains unchanged until 6 January. The IMO monitors the situation closely and will update the assessment if any changes in activity occur."}],"additional_notes":""},{"id":604,"published_at":"2025-12-17T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"A M3,4 earthquake was detected on 15 December without further escalation."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity has been slowly decreasing over time in the past 5 months only about 15 earthquakes were detected in the past week. No deformation is detected in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift and magma accumulation continues at Svartengi. As long as magma is accumulating, the likelihood of a dike propagation or an eruption remains elevated. In the run-up to eruptions on the Sundhnúkur crater row, the rate of magma accumulation has varied. Looking at the past eruptions, model calculations show that the rate of inflow has gradually decreased with each eruption. Over the past two weeks, however, the rate has remained fairly steady. The uncertainty regarding the timing of the next eruption is greater when accumulation is slow. Based on the current accumulation rate, the timing uncertainty spans months. Measurements and model calculations indicate that since March 2024, the volume of magma required to trigger a new diking event or eruption appears to have increased compared to earlier events. According to the models, the magma volume that has accumulated beneath Svartsengi between eruptions since March 2024 has varied between 17 and 23 million cubic meters. Model calculations now show that just over 17 million cubic meters of magma have been recharged beneath Svartsengi since the last eruption in July. This is similar to the volume observed just before the May 2024 eruption. The area is characterized by low seismicity; on most days only a few small earthquakes are detected between Hagafell and Grindavík. The hazard assessment map remains unchanged until 6 January. The IMO monitors the situation closely and will update the assessment if any changes in activity occur. A M3.2 earthquake was detected on Reykjanes ridge about 60 km southwest of Eldey without further escalation."}],"additional_notes":""},{"id":605,"published_at":"2025-12-24T11:00:00Z","entries":[{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"- The seismicity west of Kleifarvatn continues to slowly reduce and GNSS data show the deflation in the area has stopped"},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"- Continued seismic activity at about 20 km depth. No deformation is detected in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"- Magma accumulation continues at Svartsengi at a slow but steady rate, comparable to recent weeks. As long as magma accumulation continues, the likelihood of a magma intrusion and volcanic eruption remains elevated; however, uncertainty regarding the timing of the next eruption increases when magma accumulation is slow. Given the current rate of accumulation, the uncertainty in timing spans several months. Measurements and modelling indicate that since March 2024, the volume of magma required to trigger a magma intrusion or eruption has increased. The amount of magma that has accumulated beneath Svartsengi between eruptions since that time has ranged between 17 and 23 million cubic meters. Since the last eruption in July, just over 18 million cubic meters of magma has accumulated beneath Svartsengi. Low seismic activity continues to be recorded in the Sundhnúkur area. Only five earthquakes have been detected over the past two weeks, the largest with a magnitude of 1.9, located between Þorbjörn and Hagafell on December 17th."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"- A M3.3 earthquake was detected on December 20th without further escalation."}],"additional_notes":""},{"id":606,"published_at":"2025-12-31T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"- Magma accumulation continues at Svartsengi at a slow but steady rate, comparable to recent weeks. As long as magma accumulation continues, the likelihood of a magma intrusion and volcanic eruption remains elevated; however, uncertainty regarding the timing of the next eruption increases when magma accumulation is slow. Given the current rate of accumulation, the uncertainty in timing spans several months. Measurements and modelling indicate that since March 2024, the volume of magma required to trigger a magma intrusion or eruption has increased. The amount of magma that has accumulated beneath Svartsengi between eruptions since that time has ranged between 17 and 23 million cubic meters. Since the last eruption in July, just over 19 million cubic meters of magma has accumulated beneath Svartsengi. Low seismic activity continues to be recorded in the Sundhnúkur area. Only nine earthquakes have been detected over the past week, all of them of less than magnitude 1."},{"volcano_code":"KRY","vona_color_code":"GREEN","vals_level":0,"status_text":"- The seismicity west of Kleifarvatn has reduced since the height of activity in late summer and GNSS data show the deflation in the area has stopped. Largest earthquake recorded this week was measured at 3.1 magnitude on December 27th with some aftershock activity."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"- Continued seismic activity at about 20 km depth. No deformation is detected in the area."},{"volcano_code":"VES","vona_color_code":"GREEN","vals_level":0,"status_text":"- An earthquake of magnitude 2.6 was recorded just north of Surtsey island on December 29th without further escalation."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":0,"status_text":"- Seismicity has been above background level this week with around 50 earthquakes recorded, the largest one a magnitude 2.9 recorded on December 29th."}],"additional_notes":""},{"id":607,"published_at":"2026-01-07T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"A M4.2 was detected on 1 January without further escalation."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Continued seismic activity at about 20 km depth. No deformation is detected in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Land uplift and magma accumulation at Svartsengi continue at a steady rate, similar to recent weeks. According to modelling results, just over 19 million cubic metres of magma have now accumulated beneath Svartsengi since the last eruption in July. The likelihood of a magma intrusion and an eruption therefore continues to increase, but the timing of the next eruption remains uncertain and may range over several months. Earthquake activity in the area remains low. The Icelandic Meteorological Office's hazard assessment remains unchanged and is valid until 3 February. The IMO continues to closely monitor developments and will update the assessment if changes occur in the activity."},{"volcano_code":"ORA","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismic activity has returned to normal background level with less than 10 earthquakes detected in the past week."}],"additional_notes":""},{"id":608,"published_at":"2026-01-14T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Continued seismic activity at about 20 km depth. No deformation is detected in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Land uplift and magma accumulation at Svartsengi continue at a steady rate, similar to recent weeks. According to modelling results, just under 20 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July. The likelihood of a magma intrusion and an eruption therefore continues to increase, but the timing of the next eruption remains uncertain and may range over several months. Earthquake activity in the area remains low. The Icelandic Meteorological Office's hazard assessment remains unchanged and is valid until 3 February. The IMO continues to closely monitor developments and will update the assessment if changes occur in the activity. On 11 January a small seismic swarm was detected 60 km southwest of Eldey. About 50 earthquakes were detected and the largest was a M3.6."}],"additional_notes":""},{"id":609,"published_at":"2026-01-21T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity at about 20 km depth continues in the area of Grjótarvatn, but the rate has been decreasing with time. No deformation is detected in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Magma accumulation beneath Svartsengi is slow but steady, similar to what has been observed in recent weeks. According to model calculations, nearly 20 million cubic meters of magma have now accumulated beneath Svartsengi since the last volcanic eruption in July. As magma accumulation continues and pressure within the system increases, the most likely scenario in the coming weeks is a magma intrusion propagating from Svartsengi towards the Sundhnúkur crater row, which could end in a volcanic eruption. If an eruption occurs, it is most likely to be similar in character to the events that have occurred so far along the Sundhnúkur crater row. Looking back to the onset of magma accumulation beneath Svartsengi in November 2023, the total uplift amounts to just under 1 meter. The rate of uplift was highest at the beginning but has gradually decreased with each subsequent event. Seismic activity in recent weeks has been relatively stable, with earthquakes mainly located between Sýlingarfell and Stóra-Skógfell, south of Þorbjörn, and at Víkur. Most earthquakes are smaller than M1.5. Seismicity at Víkur is interpreted as triggered earthquakes caused by stress changes in the area. The hazard assessment remains unchanged and is valid until 3 February. The IMO will continue to closely monitor developments and update the hazard assessment should changes in activity occur."}],"additional_notes":""},{"id":610,"published_at":"2026-01-28T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift continues underneath Svartsengi as confirmed by GNSS data and satellite observations. As of today it is assessed that around 21 million m3 of magma has been accumulated since the last eruption which commenced on 16 July 2025. A dike and/ or an eruption in Sundhnúks crater row is considered the most likely evolution in the coming weeks. The seismic activity in the area remains at low level, with occasional events detected in regions where increasing crustal stress reflects increasing pressure within the volcanic system."},{"volcano_code":"THO","vona_color_code":"GREEN","vals_level":0,"status_text":"A short-lived seismic swarm occurred in Þórðarhyrna on 24 January when a total of twelve earthquakes were detected. They were all located in the middle of the caldera. The largest event had a magnitude M2.8. Seismic swarms are not very common in Þórðarhyrna, but occasional increase in seismic activity did occur in the past decades. The activity did not escalate further."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Very minor seismic activity was detected in the past week."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"More than thirty earthquakes occurred in Bárðarbunga volcano in the past week. Most of them occurred along the eastern part of the caldera rim. The largest event had a M4.1 and occurred on 22 January, it was followed by few aftershocks on the same day. Deformation in the area is confirmed by GNSS measurements and it indicates uplift due to magma accumulation at depth. Monitoring parameters do not show escalation in the volcanic activity at Bárðarbunga."},{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":0,"status_text":"A seismic swarm consisting of about 200 earthquakes started in the afternoon of 27 January in the Lambafell area. The activity has been reducing since then but it has not stopped yet. Lambafell lays on the north-eastern side of Brennisteinsfjöll volcanic system. Seismic activity in this region has occurred in the past and it is thought to have tectonic, rather than magmatic origin."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About thirty earthquakes were detected in Grjótarvatn area. The seismic activity has been slowly declining over the past months, but it is not over yet. No detectable deformation in the area."}],"additional_notes":""},{"id":611,"published_at":"2026-02-04T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"An earthquake with M5.3 was detected on 31 January on the northern side of the caldera rim. Few aftershocks followed the main event, but there was no further escalation. Earthquakes of such intensities are occurring in Bárðarbunga occasionally, with the previous M5.4 which was detected on 29 October 2025. A total of five earthquakes above M5 were detected along the Bárðarbunga caldera rim over the past year."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"A M3 earthquake was detected on 28 January without further escalation."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"On 29 January a small seismic swarm was detected about 16 km southwest of Eldey. About 40 earthquakes were detected and the largest was a M3.1"},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About twenty earthquakes were detected in Grjótarvatn area. The seismic activity has been slowly declining over the past months, but it is not over yet. No detectable deformation in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"The magma inflow rate beneath Svartsengi remains slow but steady, similar to recent weeks. According to model calculations, just under 21 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July 2025. As magma accumulation continues and pressure within the system increases, the most likely scenario in the coming weeks is a magma intrusion from Svartsengi toward the Sundhnúkur crater row, which could culminate in an eruption. If an eruption occurs, it is most likely to be similar in character to previous events along the Sundhnúkur crater row. Ground deformation and seismicity on the Reykjanes peninsula Seismic activity in the Svartsengi area remains low. An interferometric synthetic aperture radar (InSAR) image, acquired by satellite and used to detect small surface deformations by comparing images taken at different times, was recently produced. The image covers the entire Reykjanes peninsula and shows that ground deformation is only detected at Svartsengi (uplift) and nowhere else on the peninsula. The hazard assessment remains unchanged, and its validity has been extended until 3 March. IMO continues to closely monitor developments in the area and will update the hazard assessment if changes in the activity occur. On 28 January, a seismic swarm occurred near Lambafell, on the eastern part of the Reykjanes peninsula, with nearly 200 earthquakes recorded. In total, just over 260 earthquakes were detected in the area during the past week. The largest earthquake measured magnitude M3. This represents typical seismic activity for the area, with the last seismic swarm nearby Lambafell occurred in July 2024."}],"additional_notes":""},{"id":612,"published_at":"2026-02-11T11:00:00Z","entries":[{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"On 6 February a seismic swarm was detected just north of Eldey. About 500 earthquakes were detected. Four of the earthquakes were over M3 and the largest was a M3.4. On February 8 was another seismic swarm 31 km southwest of Eldey. About 80 earthquakes were detected, all under M3 in size. These seismic swarms are primarily considered to be related to plate movements. However, the Eldey volcanic system is also located in the area, and interaction between tectonic movements and volcanic activity is possible there. At present, there are no signs of magma accumulation or ground uplift at Eldey; on the contrary, deformation measurements indicate that the island is subsiding and that the activity consists of relatively typical earthquake swarms associated with plate movements."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Just under 20 earthquakes were detected in Grjótarvatn area. The seismic activity has been slowly declining over the past months, but it is not over yet. No earthquakes over M3 has been detected since Ocotber. No detectable deformation in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"The magma inflow rate beneath Svartsengi remains slow but steady, similar to recent weeks. According to model calculations, just over 21 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July 2025. As magma accumulation continues and pressure within the system increases, the most likely scenario in the coming weeks is a magma intrusion from Svartsengi toward the Sundhnúkur crater row, which could culminate in an eruption. If an eruption occurs, it is most likely to be similar in character to previous events along the Sundhnúkur crater row. The hazard assessment remains unchanged, and its validity has been extended until 3 March. IMO continues to closely monitor developments in the area and will update the hazard assessment if changes in the activity occur. Additionally Today 11 February the monthly volcano monitoring meeting long term monitoring meeting was held at the IMO. The report includes results from that meeting."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Long-term deformation in the area shows signs of decrease, but will be further investigated in coming weeks. Seismicity has been at background level."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Long-term inflation continues at a stable rate alongside with high rate of seismicity. In the past month around 170 events, one event of M5.4 in end of January."},{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"Since March last year minor deep seismic swarms were detected. There has been no deep swarms since July."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismic activity has been slowly increasing in the area. In August a new cauldron could be seen just outside the northern rim of the caldera. The conductivity in Vestari Jökulsá started increasing in August and continues to be relatively high."}],"additional_notes":""},{"id":613,"published_at":"2026-02-18T11:00:00Z","entries":[],"additional_notes":""},{"id":614,"published_at":"2026-02-25T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About 50 earthquakes were detected in Grjótarvatn area. The seismic activity has been slowly declining over the past months, but it is not over yet."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"The magma inflow rate beneath Svartsengi remains slow but steady, similar to recent weeks. According to model calculations, just over 22 million cubic metres of magma has now accumulated beneath Svartsengi since the last eruption in July. It is approaching one of the largest volumes measured since the eruptions began at the Sunhnúkur crater row on 18 December 2023. As magma continues to accumulate and pressure within the system increases, the most likely scenario in the coming weeks is a magma intrusion propagating from Svartsengi towards the Sundhnúkur crater row, which could resault in an eruption. If an eruption occurs, it is most likely to be similar to the events that have taken place so far along the Sundhnúkur crater row. Low seismic activity continues to be recorded in the Sundhnúkur area. Micro seismicity in Víkur continues but has decreased in the past week; this activity is interpreted as triggered earthquakes caused by stress changes in the area. The hazard assessment remains unchanged and is valid until 3 March. The IMO continues to closely monitor developments and will update the hazard assessment should changes in activity occur"}],"additional_notes":""},{"id":615,"published_at":"2026-03-04T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About 40 earthquakes were detected in Grjótarvatn area. The seismic activity has been slowly declining over the past months, but it is not over yet."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"The magma inflow rate beneath Svartsengi continues at a similar rate as in recent weeks, magma inflow is slow but steady. According to model calculations, approximately 22.5 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July last year. Magma has been accumulating beneath Svartsengi for around 210 days, making this the longest continuous accumulation period since the eruptive episode along the Sundhnúkur crater row began in December 2023. If magma accumulation continues at the same rate, it can be expected that by next week the total volume of magma accumulated since the last eruption will be the largest recorded between eruptions since the start of the eruptive episode. The large volume of magma and the length of the accumulation period call for further analysis of the possible development of volcanic activity. The IMO is currently revising its scenario assessments for possible developments, and these will be presented in the coming weeks.It should be noted that a prolonged pause in eruptions is not a clear indication that the eruptive episode at the Sundhnúkur crater row has ended. Low seismic activity continues to be recorded above the magma intrusion. Seismic activity near Vík has decreased. The hazard assessment remains unchanged, and its validity has been extended until 31 March. The IMO continues to monitor developments closely and will update the hazard assessment if there are changes in activity."}],"additional_notes":""},{"id":616,"published_at":"2026-03-11T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About 130 earthquakes were detected in Grjótarvatn area in the past month. The seismic activity has been slowly declining over the past months. No earthquakes over M3 has been detected since October. No deformation has been detected in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"The magma inflow rate beneath Svartsengi continues at a similar rate as in recent weeks, the magma inflow is slow but steady. According to model calculations, approximately 23 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July last year, which is the most that has been accumulated during this eruptive episode. This is also the longest continuous accumulation period since the eruptive episode along the Sundhnúkur crater row began in December 2023. The large volume of magma and the length of the accumulation period call for further analysis of the possible development of volcanic activity. The IMO is currently revising its scenario assessments for possible developments, and these will be presented in the coming weeks.It should be noted that a prolonged pause in eruptions is not a clear indication that the eruptive episode at the Sundhnúkur crater row has ended. Low seismic activity continues to be recorded above the magma intrusion. Seismic activity near Víkur has decreased. The hazard assessment remains unchanged, and its validity has been extended until 31 March. The IMO continues to monitor developments closely and will update the hazard assessment if there are changes in activity. Additionally Today 11 March the monthly volcano monitoring meeting long term monitoring meeting was held at the IMO. The report includes results from that meeting."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Long-term deformation in the area continues to show signs of decrease, but will be further investigated in coming weeks. Seismicity has been at background level."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Long-term inflation continues at a stable rate. Seismicity has been lower in the past month, the last event with above M5 was 31 January. This is a pattern that has repeated it self since 2023, where seismicity has increased peaked with an earthquake over M5 and after that the seismicity decreases for a few weeks before increasing again."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"About 155 earthquakes have been detected in the past month, the largest a M2.7. At present, there are no signs of magma accumulation or ground uplift at Eldey; on the contrary, deformation measurements indicate that the island is subsiding and that the activity consists of relatively typical earthquake swarms associated with plate movements."},{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"Since March last year minor deep seismic swarms were detected. There has been no deep swarms since July 2025."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismic activity has been slowly increasing in the area. In August a new cauldron could be seen just outside the northern rim of the caldera. The conductivity in Vestari Jökulsá started increasing in August and continues to be relatively high."}],"additional_notes":""},{"id":617,"published_at":"2026-03-18T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Just over 10 earthquakes were detected in Grjótarvatn area in the past week. The seismic activity has been slowly declining over the past months. No earthquakes over M3 has been detected since October. No deformation has been detected in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift and magma accumulation continues at a similar rate as in recent weeks, with magma inflow slow but steady. According to model calculations, more than 23 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July of last year. Magma accumulation beneath Svartsengi has never been greater since the beginning of this eruption sequence. As magma accumulation continues and pressure in the system increases, the most likely scenario is a magma intrusion from Svartsengi toward the Sundhnúkur crater row, which could lead to an eruption. Since the volume of magma beneath Svartsengi is now greater than previously during this eruption sequence, it is possible that the next eruption could be larger than earlier ones, if the magma reaches the surface either partially or fully. The most likely location of a fissure or magma intrusion is in the area between Stóra-Skógfell and Sýlingarfell, where previous intrusions and eruptions along the Sundhnúkur crater row have occurred. However, the potential fissure opening area may be more extensive, extending from Grindavík in the south to areas northwest of Keilir. The Icelandic Meteorological Office continues to work on further analysis of the possible evolution of the volcanic activity, and the results of that work will be presented at the end of March. It is important to note that a long pause between eruptions does not necessarily indicate that the eruption sequence at the Sundhnúkur crater row has ended. Low seismic activity continues to be measured above the dike. The Icelandic Meteorological Office hazard assessment remains unchanged and is valid until March 31. The IMO continues to closely monitor developments and will update the hazard assessment if changes in activity occur."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"About 30 earthquakes were detected in the past week. The largest a M3,7 located in the northern part of the caldera at about 1,3 km depth . This is the largest earthquake since January 2019 were a M3.7 was also recorded."}],"additional_notes":""},{"id":618,"published_at":"2026-03-25T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift and magma accumulation continues at a similar rate as in recent weeks, with magma inflow slow but steady. According to model calculations, about 24 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July of last year. Magma accumulation beneath Svartsengi has never been greater since the beginning of this eruption sequence. As magma accumulation continues and pressure in the system increases, the most likely scenario is a magma intrusion from Svartsengi toward the Sundhnúkur crater row, which could lead to an eruption. Since the volume of magma beneath Svartsengi is now greater than previously during this eruption sequence, it is possible that the next eruption could be larger than earlier ones, if the magma reaches the surface either partially or fully. The most likely location of a fissure or magma intrusion is in the area between Stóra-Skógfell and Sýlingarfell, where previous intrusions and eruptions along the Sundhnúkur crater row have occurred. However, the potential fissure opening area extends from Grindavík in the south to areas northwest of Keilir. The Icelandic Meteorological Office continues to work on further analysis of the possible evolution of the volcanic activity, and the results of that work will be presented at the end of March. It is important to note that a long pause between eruptions does not necessarily indicate that the eruption sequence at the Sundhnúkur crater row has ended. Low seismic activity continues to be measured above the dike. The Icelandic Meteorological Office hazard assessment remains unchanged and is valid until March 31. The IMO continues to closely monitor developments and will update the hazard assessment if changes in activity occur. Reykjanes Ridge: A short lived seismic swarm was detected on 23-24 March about 20 km southwest of Eldey. About 360 earthquakes were detected and 4 earthquakes were measured over M4, the largest was a M4.4. Swarms like this are common in that area with the last one which occurred on 8 February 2026."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"A M3.1 earthquake was detected on 19 March without further escalation."},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":0,"status_text":"A small seismic swarm was detected in Eldborgarhraun on 19-20 March. About 200 earthquakes were detected in total, the largest was a M2.5."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About 25 earthquakes were detected in Grjótarvatn area in the past week. The seismic activity has been slowly declining over the past months. No earthquakes over M3 has been detected since October 2025. No deformation has been detected in the area."}],"additional_notes":""},{"id":619,"published_at":"2026-04-01T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift and magma accumulation continues at a slower rate than previously measured, but has been steady for the past weeks. According to model calculations, more than 24 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July of last year. Magma accumulation beneath Svartsengi has never been greater since the beginning of this eruption sequence in November 2023. As magma accumulation continues and pressure in the system increases, the most likely scenario is a magma intrusion from Svartsengi toward the Sundhnúkur crater row, which could lead to an eruption. Since the volume of magma beneath Svartsengi is now greater than previously during this eruption sequence, it is possible that the next eruption could be larger than earlier ones, if the magma reaches the surface either partially or fully. The most likely location of a fissure or magma intrusion is in the area between Stóra-Skógfell and Sýlingarfell, where previous intrusions and eruptions along the Sundhnúkur crater row have occurred. However, the potential fissure opening area may be more extensive, extending from Grindavík in the south to areas northwest of Keilir. It is important to keep in mind that slow magma accumulation is not a clear indication that an eruption will not occur. The closest example of this is the series of eruptions in Krafla volcano, North Iceland during the years 1975-1984. Despite a slow magma accumulation rate for nearly 3 years, an eruption eventually occurred in August 1984, which was also the largest eruption during the Krafla Fires. Following the last eruption, continued ground uplift was measured until 1989, which did not end with an eruption. In order to be able to assert that a volcanic eruption sequence is over, clear signs must appear in monitoring data over a longer period of time. This is reflected in the volcano's VALS (volcano alert level system), which now remains at level 2 'Considerably increased activity' (orange). IMO has created a criteria for asserting the VALS level. When the alert level for the volcano has been lowered to level 0, it can be suggested that the eruption series is over. If the uplift continues, the level remains unchanged (level 2). If no uplift is detected over the period of 3 months, the level is lowered to level 1. If subsidence is detected for over 6 month, the level is lowered to level 0. Further information about the VALS is found here https://en.vedur.is/earthquakes-and-volcanism/volcanoes/volcano-alert-level-system/ It is important to keep in mind that even if magma accumulation stops for a few months, there is a possibility that it could start again. Eruption sequences on the Reykjanes Peninsula can last for decades or centuries with breaks between events. A long pause between eruptions is therefore not an indication that the activity is over. The hazard assessment remains unchanged and is valid until June 30 unless changes in activity occur."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"An M3.1 earthquake was detected at Bárðarbunga on 31 March without further escalation."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About 40 earthquakes were detected in Grjótarvatn area in the past week. The seismic activity has been slowly declining over the past months. No earthquakes over M3 have been detected since October 2025. No deformation has been detected in the area."}],"additional_notes":""},{"id":620,"published_at":"2026-04-08T11:00:00Z","entries":[{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About 60 earthquakes were detected in Grjótárvatn area in the past week. The seismic activity has been slowly declining over the past months. No earthquakes over M3 have been detected since October 2025. There are currently no evidences of ongoing ground deformation in the area."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift and magma accumulation continues at a slower rate than previously measured, but has been steady for the past weeks. According to model calculations, more than 24 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July of last year and the uplift of the area is estimated to be ~2 cm since the beginning of March. Magma accumulation beneath Svartsengi has never been greater since the beginning of this eruption sequence in November 2023. As magma accumulation continues and pressure in the system increases, the most likely scenario is a magma intrusion from Svartsengi toward the Sundhnúkur crater row, which could lead to an eruption. Since the volume of magma beneath Svartsengi is now greater than previously during this eruption sequence, it is possible that the next eruption could be larger than earlier ones, if the magma reaches the surface either partially or fully. In order to be able to assert that a volcanic eruption sequence is over, clear signs must appear in monitoring data over a longer period of time. This is reflected in the volcano's VALS (volcano alert level system), which now remains at level 2 'Considerably increased activity' (orange). Further information about the VALS is found here: https://en.vedur.is/earthquakes-and-volcanism/volcanoes/volcano-alert-level-system/ The hazard assessment remains unchanged and is valid until June 30 unless changes in activity occur. Additionally Today IMO held its monthly meeting to review the status of volcanoes in Iceland. The report as such is longer than usual."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past month has been within the normal background level. According to GNSS data the deformation in the area has reduced significantly and the next months will be critical to assess whether the uplift in Askja is over."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Bárðarbunga over the past month has been within the normal conditions, but the data shows an increasing trend which could be a prelude for a large earthquake in the coming months. Deformation at Bárðarbunga has been accelerating for a few years, and data analysis is ongoing to understand whether there has been a further increase in the past months."},{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity in Eyjafjallajökull since the past few months has been extremely low. GNSS data confirm no indication of deformation in the area."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity in Grímsvötn has been low in the past month. The deformation rate at Grímsvötn shows a significant reduction in connection to the fast uplift occurring at the nearby volcanic system Bárðarbunga."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":0,"status_text":"Very minor seismicity in Hekla."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Hofsjökull is within the normal background level, but the increased geothermal activity is still confirmed by the ongoing increase in electrical conductivity along Vestari Jökulsá í Skagafjörður river."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity in Katla is considered within the normal background condition."}],"additional_notes":""},{"id":621,"published_at":"2026-04-15T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past week has been within the normal background level. No earthquakes over magnitude 3 were observed. As reported last week, according to GNSS data the deformation in the area has reduced significantly and the next months will be critical to assess whether the uplift in Askja is over."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Bárðarbunga over the past week has been within the normal conditions. No earthquakes over magnitude 3 were observed. As reported last week the data shows an increasing trend which could be a prelude for a large earthquake in the coming months. Deformation at Bárðarbunga has been accelerating for a few years, and data analysis is ongoing to understand whether there has been a further increase in the past months"},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Very minor seismicity in Hofsjökull in the past week."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Around 25 earthquakes have been detected in the Grjótarvatn area, all of them below M1. The seismicity in the area has been declining with time as reported in the past weeks. Deformation is not detected by the GNSS network."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Uplift and magma accumulation continues in a similar manner as in recent weeks, with magma inflow being slow but steady. According to model calculations, about 25 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July last year. This is the largest volume measured since the eruptions began on the Sundhnúkur crater row. As magma continues to accumulate and pressure in the system increases, the most likely scenario is that a magmatic dike will propagate from Svartsengi toward the Sundhnúkur crater row, which could lead to an eruption. Short warning times must be expected, as before, ranging from about 20 minutes up to just over four hours. Seismic activity has remained low in recent weeks along the dike region, averaging about two small earthquakes per day. On April 13, thirteen small earthquakes were recorded at around 10 km depth in Fagradalsfjall, whereas no more than three earthquakes per day have been recorded there in recent months. The Icelandic Meteorological Office’s hazard assessment remains unchanged and is valid until June 30. The IMO’s 24/7 monitoring team continues to closely track developments, and the hazard assessment will be updated if there are changes in activity."}],"additional_notes":""},{"id":622,"published_at":"2026-04-22T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"In the past week increased seismicity of smaller earthquakes were detected at Bárðarbunga where about 40 earthquakes were detected last week to just over 110 earthquakes this week. All earthquakes were under M2. This is in line with the increasing trend mentioned in previous reports that may herald a large earthquake in the coming months. Deformation at Bárðarbunga has been accelerating for a few years, and data analysis is ongoing to understand whether there has been a further increase in the past months."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"There was a slight increase in seismicity in the past week where around 40 earthquakes have been detected in the Grjótarvatn area, all of them below M2. There is no deformation detected in the area by the GNSS network"},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past week has been within the normal background level. As reported previously, according to GNSS data the deformation in the area has reduced significantly and the next months will be critical to assess whether the uplift in Askja is over."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismicity in Hofsjökull in the past week"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Uplift and magma accumulation continues in a similar manner as in recent weeks, with magma inflow being slow but steady. According to model calculations, about 25 million cubic meters of magma have now accumulated beneath Svartsengi since the last eruption in July last year. This is the largest volume measured since the eruptions began on the Sundhnúkur crater row. As magma continues to accumulate and pressure in the system increases, the most likely scenario is that a magmatic dike will propagate from Svartsengi toward the Sundhnúkur crater row, which could lead to an eruption. Short warning times must be expected, as before, ranging from about 20 minutes up to just over four hours. Low seismic activity continues along the dike region, as well as at Fagradalsfjall and Víkur. The Icelandic Meteorological Office’s hazard assessment remains unchanged and is valid until June 30. The IMO’s 24/7 monitoring team continues to closely track developments, and the hazard assessment will be updated if there are changes in activity"}],"additional_notes":""},{"id":623,"published_at":"2026-04-29T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift and magma accumulation continue beneath Svartsengi. Magma accumulation is slow but steady, as it has been in recent weeks. According to model calculations, over 25 million cubic meters of magma have accumulated since the last eruption in July, with deformation measuring up to 2 cm per month. As magma continues to accumulate and pressure in the system increases, the most likely scenario is that a magmatic dike will propagate from Svartsengi toward the Sundhnúkur crater row, which could lead to an eruption. Short warning times must be expected, as before, ranging from 20 minutes up to just over four hours. Low seismic activity continues to be measured near the dike region, though it appears to have increased slightly over the past two weeks. Most earthquakes are below magnitude 1. The Icelandic Met Office hazard assessment remains unchanged and is valid until June 30. The IMO's 24/7 monitoring team continues to closely track developments, and the hazard assessment will be updated if there are changes in activity. A seismic swarm was detected on the evening of April 25 and early night April 26 located offshore about 3-4 km west of Reykjanes with close to 80 earthquakes, largest was a M3."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past week has been within the normal background level. As reported previously, according to GNSS data the deformation in the area has reduced significantly and the next months will be critical to assess whether the uplift in Askja is over."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"In the past week seismicity of smaller earthquakes detected at Bárðarbunga remained close to 65 but was slightly lower than the previous week. One earthquake above M3 was detected, estimated M3.2. This is in line with the increasing trend mentioned in previous reports that may herald a large earthquake in the coming months. Deformation at Bárðarbunga has been accelerating for a few years, and data analysis is ongoing to understand whether there has been a further increase in the past months."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"Close to 10 earthquakes occurred southwest of Eldey on 27 April with the largest earthquake of M3.3. Seismicity in this area is not unusual. Deformation data (GPS) do not show changes from the background."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismicity in Hofsjökull in the past week"},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in the past week decreased again in the last week with below 20 earthquakes detected in the Grjótarvatn area, all of them below M2. There is no deformation detected in the area by the GNSS network"}],"additional_notes":""},{"id":624,"published_at":"2026-05-06T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi measuring up to 2 cm per month. Very few earthquakes, all beneath magnitude 1, continue to be measured in the region. According to model calculations, over 25 million cubic meters of magma have accumulated since the last eruption in July 2025. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. Short warning times ranging from 20 minutes up to just over four hours are anticipated.The Icelandic Met Office hazard assessment remains unchanged and is valid until June 30, 2026. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismicity, similar to last week."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismic activity in the past week was similar to the week before, all earthquakes were under M2. Ground uplift continues."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismicity, similar to last week."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismicity, slightly more than last week. There is no deformation detected in the area by the GNSS network."}],"additional_notes":""},{"id":625,"published_at":"2026-05-13T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past week has been within the normal background level. As reported previously, according to GNSS data, the deformation in the area has reduced significantly and the next months will be critical to assess whether the uplift in Askja is over."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"In the past week increased seismicity of smaller earthquakes were detected at Bárðarbunga, with just over 130 earthquakes detected this week compared to 87 last week. Two earthquakes above M2 were detected. This is in line with the increasing trend mentioned in previous reports that may herald a large earthquake in the coming months. Deformation at Bárðarbunga has been accelerating for a few years, and data analysis is ongoing to understand whether there has been a further increase in the past months."},{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":0,"status_text":"M3.6 earthquake on May 13th, west of Nesjavellir."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"No seismicity in Hofsjökull in the past week."},{"volcano_code":"LAN","vona_color_code":"GREEN","vals_level":0,"status_text":"M3.0 earthquake on May 11th, west of Þórisjökull."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Around 30 earthquakes have been detected in the Grjótárvatn area, similar to last week, all of them below M2. There is no deformation detected in the area by the GNSS network."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi measuring up to 2 cm per month. Low seismic activity continues along the dike region and at Víkur, with one earthquake above magnitude 1. According to model calculations, over 25 million cubic meters of magma have accumulated since the last eruption in July 2025. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. Short warning times ranging from 20 minutes up to just over four hours are anticipated. The Icelandic Met Office hazard assessment remains unchanged and is valid until June 30, 2026. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."}],"additional_notes":""},{"id":626,"published_at":"2026-05-20T11:00:00Z","entries":[{"volcano_code":"EYJ","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity in Eyjafjallajökull for the past few months has been low. GNSS data confirm no indication of deformation in the area."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity in Grímsvötn has been within normal background level in the past months. The deformation rate at Grímsvötn shows a significant reduction which has been observed in connection to the fast uplift occurring at the nearby volcanic system Bárðarbunga."},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":0,"status_text":"A M3,6 was detected on 13 May, about 6 km north of Hengill, without further escalation."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Hofsjökull is within the normal background level. The increased geothermal activity is still confirmed by the ongoing increase in electrical conductivity in Vestari Jökulsá í Skagafjörður river."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity in Katla has been slightly increasing since February 2026. Similar occurred in July-November 2025."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"About 60 earthquakes were detected in Grjótárvatn area in the past week. The seismic activity has been slowly declining over the past months. No earthquakes over M3 have been detected since October 2025. There are currently no evidences of ongoing ground deformation in the area."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past month has been within the normal background level. According to GNSS data the deformation in the area has reduced significantly and the next months will be critical to assess whether the uplift in Askja is hiatus."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Bárðarbunga over the past month has been within the normal conditions, but the data shows an increasing trend which could be a prelude for a large earthquake (~M5) in the coming months. Deformation at Bárðarbunga continues at a stable rate since the past year."},{"volcano_code":"HEK","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity at Hekla as been within normal background level in the past months."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi measuring up to 2 cm per month. Low seismic activity continues along the dike region and at Víkur. According to model calculations, just under 26 million cubic meters of magma have accumulated since the last eruption in July 2025. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. Short warning times ranging from 20 minutes up to just over four hours are anticipated. The Icelandic Met Office hazard assessment remains unchanged and is valid until June 30, 2026. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic activity is within background level and been for the past several months. In the past week about 15 earthquakes were detected. Additionally Today 20 May, IMO held its monthly meeting to review the status of volcanoes in Iceland. The report includes results from that meeting. In February 2026 IMO implemented a new seismic system called SeisComP. Work on the implementation and correlation with the old system is still ongoing."}],"additional_notes":""},{"id":627,"published_at":"2026-05-27T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi measuring up to 2 cm per month. Low seismic activity continues along the dike region and at Víkur, with one earthquake of magnitude 1.0 close to the dike. According to model calculations, over 26 million cubic meters of magma have accumulated since the last eruption in July 2025. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. Short warning times ranging from 20 minutes up to just over four hours are anticipated. The Icelandic Met Office hazard assessment remains unchanged and is valid until June 30, 2026. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past week is within background level, with 14 earth quakes, none above M1.0. No significant deformation observed by GNSS network"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"In the last week more than 100 earthquakes have been recorded at Bárðarbunga. On May 25 close to 40 earthquakes were detected with the largest one of M3.8 occurring in the Bárðarbunga caldera at 3:50 UTC, followed by several aftershocks. Earthquakes of this magnitude are fairly regular at the volcano and the last one of the same size occurred on March 31. Deformation at Bárðarbunga continues at a stable rate since the past year."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"A seismic swarm started May 23 just after 21 UCT on the Reykjanes Ridge, about 10 km west of Reykjanestá. More than 250 earthquakes have been recorded with the largest one of M3.5. Seismicity in this area is not unusual. Deformation data (GPS) do not show changes from the background."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"45 earthquakes detected at Ljósufjöll, all under M2. No significant deformation detected by the GNSS network"},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"A seismic swarm occurred between May 19-25 with 79 earthquakes detected SW of Prestahnúkur, the largest of M 2.2."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity within background levels. About 30 earthquakes were detected largest a M1.1"}],"additional_notes":""},{"id":628,"published_at":"2026-06-03T11:00:00Z","entries":[{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"Another seismic swarm occurred May 30 to June 2 with 55 detected earthquakes with the largest being M2.0."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"Dispersed seismic activity at Eldey with over 50 earthquakes, the largest was a M3.3 SW of Eldey, which was detected June 2, 14:35 UTC."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"In the last week more than 60 earthquakes have been recorded at Bárðarbunga with the largest one of M3.7 occurring in the Bárðarbunga caldera on June 1, 14:12UTC . Earthquakes of this magnitude are fairly regular at the volcano and the last one of the same size occurred in the past week. No significant changes in observable deformation, which continues to inflate at a stable rate since the past year."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi measuring up to 2 cm per month. Low seismic activity continues along the dike region. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. Short warning times ranging from 20 minutes up to just over four hours are anticipated. The Icelandic Met Office hazard assessment remains unchanged and is valid until June 30, 2026. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity within background levels. Above 40 earthquakes in the past week with the largest being M1.6 Additionally A seismic swarm began May 31 around 7 i the morning at Svínahraun west of Húsmúli. This area is between two volcanic systems: Brennisteinsfjöll and Hengill. Currently more than 1250 earthquakes have been detected, the largest one a M4.5 on June 1 at 13:45 UCT, 19 earthquakes above M2, and 4 earthquakes above M3. No significant deformation detected by the GNSS network. This seismic swarm is suggested to be tectonic based on the earthquake mechanisms and no sign of deformation"}],"additional_notes":""},{"id":629,"published_at":"2026-06-10T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi measuring up to 2 cm per month. Low seismic activity continues along the dike region. According to model calculations, over 27 million cubic meters of magma have accumulated since the last eruption in July 2025. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. Short warning times ranging from 20 minutes up to just over four hours are anticipated. The Icelandic Met Office hazard assessment remains unchanged and is valid until 30 June, 2026. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity. Additionally The seismic swarm which began 31 May at Svínahraun west of Húsmúli continued until 4 June with approximately 1350 earthquakes detected. A second swarm at Víffilsfell, 6 km WSW of the first, occurred 1-4 June with 250 earthquakes, largest M1.8. These seismic swarms are suggested to be tectonic based on the earthquake mechanisms and no sign of deformation. Today 10 June, IMO held its monthly meeting to review the status of volcanoes in Iceland. The report includes results from that meeting."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past month has been within the normal background level. According to GNSS data the deformation in the area has reduced significantly and the next months will be critical to assess whether the uplift in Askja is hiatus"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Bárðarbunga over the past month has been within the normal conditions, but the data shows an increasing trend which could be a prelude for a large earthquake (~M5) in the coming months. Deformation at Bárðarbunga continues at a stable rate since the past year."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismicity in Grímsvötn has been within normal background level in the past months."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Hofsjökull is within the normal background level."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismic activity in the past month is similar to the past months. No earthquakes over M3 have been detected since October 2025. There are currently no evidences of ongoing ground deformation in the area."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic swarm which began 30 May continues with a total of 500 earthquakes, largest M3.9 on 3 June 23:08."}],"additional_notes":""},{"id":630,"published_at":"2026-06-17T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"An intense seismic swarm was observed at Bárðarbunga on June 13-14. The largest event was a M4.8 and over 400 events were detected, falling on the northwestern part of the caldera. The activity was similar to events taking place in January 2025. No tremor signals were detected. VONA was raised to yellow for a short time, but lowered back to green on June 15. The IMO continues to monitor the situation closely."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic swarm which began 30 May continues with a total of 700 earthquakes, largest M3.9 on 3 June 23:08."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi measuring up to 2 cm per month. Low seismic activity continues along the dike region, but a short seismic swarm was observed in the Víkur region just west of Grindavík on June 15. The activity is believed to be due to stress build up related to the Svartsengi inflation. According to model calculations, over 27 million cubic meters of magma have accumulated since the last eruption in July 2025. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. Short warning times ranging from 20 minutes up to just over four hours are anticipated. The Icelandic Met Office hazard assessment remains unchanged and is valid until 30 June, 2026. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."}],"additional_notes":""},{"id":631,"published_at":"2026-06-24T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Last week´s seismic swarm is over with very little activity this week."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"There was one earthquake over M3 on the Reykjanes Ridge as part of a small, common swarm of earthquakes."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic swarm which began 30 May gradually taper off with a total over 200 earthquakes, 15 earthquakes above M2 and the largest M3.3 on June 24 07:55."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi measuring up to 2 cm per month. There was very little seismic activity this week. According to model calculations, magma continues to slowly accumulate but so slowly that within uncertainty of the model the volume reported last week (over 27 million cubic meters of magma) remains the same value. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. Short warning times ranging from 20 minutes up to just over four hours are anticipated. The Icelandic Met Office hazard assessment remains unchanged and is valid until 30 June, 2026. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."}],"additional_notes":""},{"id":632,"published_at":"2026-07-01T11:00:00Z","entries":[{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic swarm which began 30 May continues to decrease in intensity with a around 120 earthquakes, 8 earthquakes above M2, and the largest M3.0 on June 27 01:00."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi measuring up to 2 cm per month. There was very little seismic activity this week. According to model calculations, magma continues to slowly accumulate but so slowly (over 27 million cubic meters of magma) . The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. Short warning times ranging from 20 minutes up to just over four hours are anticipated. The Icelandic Met Office hazard assessment remains unchanged and it´s validity time was updated 30 June, 2026 and is now valid until September 30, 2026 . The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."}],"additional_notes":""},{"id":633,"published_at":"2026-07-08T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past month has been within the normal background level. According to GNSS data the deformation in the area has reduced significantly and the next months will be critical to assess whether the uplift in Askja is hiatus"},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Bárðarbunga over the past month has been within the normal conditions, but the data shows an increasing trend which could be a prelude for a large earthquake (~M5) in the coming months. Deformation at Bárðarbunga continues at a stable rate since the past yea"},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismic activity in the past month is similar to the past months. No earthquakes over M3 have been detected since October 2025. There are currently no evidences of ongoing ground deformation in the area."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"In June about 960 earthquakes were detected in two larger swarms the former from 3-5 June and later 23 - 25 June, however seismicity was still being detected throughout the whole month. The seismicity is located northwest of Þórisjökull. The largest was a M3.9 detected on 3 June. This is the largest event detected in the area since beginning of measurements. The seismic swarm has been decreasing in the past week and continues to decrease in intensity with a around 50 earthquakes detected."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi. Low seismic activity continues along the dike region. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. The Icelandic Met Office hazard assessment has been updated until 30. September but remains unchanged. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity. Additionally Today was the monthly longterm monitoring meetings. Therefor the report is longer than usual."}],"additional_notes":""},{"id":634,"published_at":"2026-07-15T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja over the past week has been within the normal background level. According to GNSS data the deformation in the area has reduced significantly and the next months will be critical to assess whether the uplift in Askja is in hiatus."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Bárðarbunga over the past week has been within the normal conditions. Deformation at Bárðarbunga continues at a stable rate since the past year."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismic activity in the past week is similar to the past weeks. No earthquakes over M3 have been detected since October 2025. There are currently no evidences of ongoing ground deformation in the area."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic swarm has been decreasing since the two swarms in June and continues to decrease in intensity, with below 10 earthquakes detected in the past week, none over M3."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi. Low seismic activity continues along the dike region. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. The Icelandic Met Office hazard assessment has been updated until 30. September but remains unchanged. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."}],"additional_notes":""},{"id":635,"published_at":"2026-07-22T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"The assessment for Askja volcano remains unchanged from the past week. A field trip is planned in August to perfom the annual measurement campaign at Askja. The results will contribute to constrain its current status."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity in Bárðarbunga over the past week has been within the normal conditions. Inflation at Bárðarbunga continues at a stable rate since the past year."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"A magnitude 3.8 earthquake occurred on the evening of July 15th on Mýdarsjökull, followed by a dozen of aftershocks with magnitude 2."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismic activity in the past month is similar to the past months. No earthquakes over M3 have been detected since October 2025. There are currently no evidences of ongoing ground deformation in the area."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic swarm has been decreasing since the two swarms in June and continues to decrease in intensity, with less than 30 earthquakes detected in the past week, none over M2."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi. Low seismic activity continues along the dike region. A total of about 28 million m3 of magma is assessed to have accumulated since the last eruption which started on 16 July 2025. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. The Icelandic Met Office hazard assessment has been updated until 30. September but remains unchanged. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."}],"additional_notes":""},{"id":636,"published_at":"2026-07-29T11:00:00Z","entries":[{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":0,"status_text":"On July 27, a M4.1 earthquake occurred in the Nesjavellir area, close to the Nesjavellir geothermal power plant. This is the largest earthquake in that area since 1998, when a M4.6 earthquake occurred in a similar area. A few aftershocks followed. Earlier this summer/spring, a slight increase in the subsidence of this area was detected, possibly in relation to the utilization of the geothermal heat."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"The IMO has received reports of sulfur smell near the Múlakvísl and Jökulsá á Sólheimasandi glacier rivers. In addition over the past few days, an increased level of volcanic gases (CO2 and H2S) has been measured at Láguhvolar. This might be due to water leakages from the known geothermal area within the Katla caldera. Such leakages are common during summertime. No significant increase in the seismic activity has been detected."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismic activity in the past week has been minor with few earthquakes detected on a daily basis. There are currently no evidences of ongoing ground deformation in the area."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"The seismic swarm which started in June, west of Mt. Prestahnúkur, seems to be mostly finished. Only three earthquakes were detected there last week, the largest one had a magnitude of M1.7"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi. Low seismic activity continues along the dike region. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. The Icelandic Met Office hazard assessment has been updated until 30. September but remains unchanged. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja remained within background levels. As has been stated in previous reports, the uplift in Askja has decreased significantly. GNSS, levelling, and InSAR measurements which will be done in the next weeks/months will give important information on whether the inflation has stopped. A field trip will be made to Askja in the beginning of August to do some of these measurements, as well as to measure volcanic gas in the area."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"On July 28, a M5.2 earthquake occurred in the northern part of the Bárðarbunga caldera. Several aftershocks were detected, but the activity decreased with time. Earthquakes with such a large magnitude occur occasionally within Bárðarbunga. This year, two similar earthquakes have occurred, on June 13 (M4.8) and on January 31 (M5.3). The inflation of the volcano has continued at a steady rate for the past year."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"On 28 July, a M2.9 earthquake occurred on the northern rim of the Torfajökull caldera and it was felt in the area of Landmannalaugar. Few aftershocks followed the main event. Earthquakes of such intensity (or even larger) are not unusual for this area. Additionally Reykjanes Ridge - On July 25, a seismic swarm occurred on the Reykjanes Ridge, about 60 km WSW of Eldey. Four earthquakes with magnitude 3 or above were detected, with the maximum magnitude of M3.4. The seismic swarm lasted for about one day, the seismicity in the area is again close to background levels. Seismic swarms are common in this area."}],"additional_notes":""},{"id":637,"published_at":"2026-08-05T11:00:00Z","entries":[{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi. Low seismic activity continues along the dike region. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. The Icelandic Met Office hazard assessment has been updated until 30. September but remains unchanged. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."},{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity in Askja remained within background levels. A field trip to Askja is currently ongoing to perform annual geodetic and geochemical measurements. The results will contribute to assess the level of activity of Askja volcano."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismicity has returned to background levels after the July 28th M5.2 earthquake and subsequent aftershocks. The inflation of the volcano has continued at a steady rate for the past year."},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity has decreased after the July 27 M4.1 earthquake and subsequent aftershocks in the Nesjavellir area, close to the Nesjavellir geothermal power plant."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Minor geothermal water leakages continue. Increases in electrical conductivity and in gas concentration have been detected along few glacial rivers fed by Myrdalsjökull in the past weeks."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismic activity in the past week has been minor with few earthquakes detected on a daily basis. There are currently no evidences of ongoing ground deformation in the area."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"There was a small increase in seismicity in the last week, but the overall trend of seismicity is still strongly down since the seismic swarm started in June, west of Mt. Prestahnúkur."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"Seismicity has returned to background rates after the M2.9 earthquake and subsequent aftershocks which occurred on the 28th of July on the northern rim of the Torfajökull caldera."}],"additional_notes":""},{"id":638,"published_at":"2026-08-12T11:00:00Z","entries":[{"volcano_code":"ASK","vona_color_code":"GREEN","vals_level":1,"status_text":"Measurements field campaign at Askja has been completed this week. Geodetic measurements show that the uplift, which started in 2021, has now stopped and there are initial indications of subsidence in the area. Geochemical monitoring data show no changes from the baseline (as measured on the Eastern side of the caldera). The seismicity in the area continues to be minor and within the background level. In light of all these evidences the unrest at Askja is declared over and the Volcano Alert Level moved back to 0 (normal background - https://en.vedur.is/earthquakes-and-volcanism/volcanoes/volcano-alert-level-system/)."},{"volcano_code":"GRV","vona_color_code":"GREEN","vals_level":0,"status_text":"Nothing to report for Grímsvötn. The seismicity remains within known background level."},{"volcano_code":"HEN","vona_color_code":"GREEN","vals_level":0,"status_text":"The deflation signal which was reported in beginning of July has reduced with time and it has almost stopped."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Hydrological measurements indicate the geothermal water leakage continues but at reduced intensity than previous months. The level of seismicity is overall considered to be still above the known background level."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Geothermal water leakages have been reported along many rivers fed by Myrdalsjökull in the last month. A temporary increase in seismicity often accompaign these events. Deformation data at AUST station (NE of the caldera) shows movements which are consistent with the drainage from cauldrons in the area. Such slightly hightened level of activity is quite typical for Katla volcano in summer time."},{"volcano_code":"KRA","vona_color_code":"GREEN","vals_level":0,"status_text":"Annual geochemical measurements have been performed and preliminary results show no major variations from previous years."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity over the past week has been quite minimal. Large earthquakes at Bárðarbunga (the last one which occurred on 28 July) are often followed by reduced seismicity in the area."},{"volcano_code":"KVE","vona_color_code":"GREEN","vals_level":0,"status_text":"Over the past days an increase of electrical conductivity has been reported for the Jökulsa á Fjöllum river. A possible explanation might be geothermal water leakage from Kverkfjöll. Other volcanic systems in the vicinity might though be responsible for the increase. The seismicity in the area does not show unusual trend."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity, even though descreasing, is still considered beyond normal conditions and not yet within the known background level."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi. Low seismic activity continues along the dike region. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. The Icelandic Met Office hazard assessment has been updated until 30. September but remains unchanged. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity. Additionally Today, 12 August 2026, IMO had its monthly Long term monitoring meeting. For this reason the report is richer than usual and it took slightly longer to compile."}],"additional_notes":""},{"id":639,"published_at":"2026-08-19T11:00:00Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"There has been minimal seismic activity with 10 events, largest M2.5"},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Hydrological measurements indicate the geothermal water leakage continues but at reduced intensity than previous months. There has been no seismic activity detected in the past week."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Geothermal water leakages have been reported along many rivers fed by Mýrdalsjökull in the last month and this morning (19 Aug) high conductivity levels were measured in the river Múlakvísl but without increased water level. Around the same time unsafe levels of H2S were measured ~2 km from Kötlujökull glacier. It is interpreted as a sign of a minor glacial flood. Seismicity remains at background levels and the GNSS station AUST continues to show movements consistent with the drainage from cauldrons in the area."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"The seismicity, even though descreasing, is still considered beyond normal conditions and not yet within the known background level. There have been only 25 events in the past 7 days, largest M1.5"},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Slow and steady ground uplift continues beneath Svartsengi. Low seismic activity continues along the dike region. The most likely scenario continues to be that a magmatic dike will propagate from Svartsengi towards the Sundhnúkur crater row, which can result in an eruption. The Icelandic Met Office hazard assessment has been updated until 30. September but remains unchanged. The IMO's 24/7 monitoring team continues to closely track developments and the hazard assessment will be updated if there are changes in activity."}],"additional_notes":""},{"id":640,"published_at":"2026-08-26T11:00:00Z","entries":[{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"A minor glacial flood from Kötlujökull glacier started in the early hours 19 August with high conductivity levels in Múlakvísl river and unsafe levels of H2S ~2 km from Kötlujökull glacier. The event culminated in the morning of 20 August and conductivity and gas levels decreased significantly afternoon the same day. Minor seismicity and ground movements associated with the glacial flood have occurred. No further escalation since."},{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismic activity in the past week."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"No seismic activity was detected the past week. The status of Hofsjökull will be reasessed during the next long-term monitoring meeting, which will be in 2 weeks."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Seismic activity is been decreasing over the past months but is still considered to be above background level. Only 12 events were detected this week."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift continues at a slow and steady rate beneath Svartsengi. Seismic activity along the dike region is low. The most likely scenario continues to be that a magmatic dike will propagate from Svartengi towards the Sundhnúkur crater row, which can result in an eruption. The Icelandic Met Office hazard assessment is valid until 30 September and remains unchanged. Additionally Reykjanes Ridge: A small seismic swarm started just West of Reykjanestá on the 24 Aug. at 04:20 AM with ~62 events detected, all very small. Another seismic swarm started a day later, on the Reykjanes ridge on the 25 August around 3:30 AM with approx. 170 events detected, largest being two events of M4.1, both located ~26 km WSW of Eldey. The seismic swarm lasted ~6 hours. No further escalation."}],"additional_notes":""},{"id":641,"published_at":"2026-09-02T10:59:01.169140Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismic activity with ca. 30 events with one M. 2.95."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Minor seismic activity with ca. 30 events, with the largest event being M2.0 on 10:13 August 28. Increased conductivity has been measured in the river Múlakvísl indicating leakage of geothermal water into the river. The water level in the river remains the same and at this moment there is no indication of a jökulhlaup (outburst flood). Gas pollution has been measured in the area. Geothermal leakage is well known for this area over the summer and was last detected August 19, 2026. The activity is closely monitored by the staff from the Icelandic Met Office."},{"volcano_code":"ELD","vona_color_code":"GREEN","vals_level":0,"status_text":"Minor seismic activity after the seismic swarm that began on August 25. Around 30 events have been detected with the largest being a M2.4 on Aug 26, 17:30."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismic activity in the past week."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismic activity in the past week."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift continues at a slow and steady rate beneath Svartsengi. Seismic activity along the dike region is low. The most\nlikely scenario continues to be that a magmatic dike will propagate from Svartengi towards the Sundhnúkur crater row, which\ncan result in an eruption. The Icelandic Met Office hazard assessment is valid until 30 September and remains unchanged."}],"additional_notes":null},{"id":644,"published_at":"2026-09-09T11:23:08.674432Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismic activity, with less than 10 earthquakes detected."},{"volcano_code":"KAT","vona_color_code":"GREEN","vals_level":0,"status_text":"Minor seismic activity with less than 20 events, all below M2.0. Conductivity and gas measurements are back to normal levels after last weeks elevated values."},{"volcano_code":"BRE","vona_color_code":"GREEN","vals_level":0,"status_text":"Minor seismic swarm with about 130 earthquakes detected from 4th-5th September with the largest one M3.0 on Sep. 4th 20:18."},{"volcano_code":"HOF","vona_color_code":"GREEN","vals_level":0,"status_text":"Minor seismic activity, less than 4 events per month during the last 3 months. Consequently the VALS level has been lowered from 1 to 0, which is background activity. Geothermal water leakage is still detected."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismic activity in the past week, with less than 20 detected earthquakes. This is still above known background level. Depth of most events is between 15-20 km."},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift continues at a slow and steady rate beneath Svartsengi. Seismic activity along the dike region is low. The most\nlikely scenario continues to be that a magmatic dike will propagate from Svartengi towards the Sundhnúkur crater row, which\ncan result in an eruption. The Icelandic Met Office hazard assessment is valid until 30 September and remains unchanged."}],"additional_notes":"Today September 9, 2026, the monthly long-term monitoring meeting was held. and the VALS levels for the volcanoes have been evaluated."},{"id":645,"published_at":"2026-09-16T08:55:13.326967Z","entries":[{"volcano_code":"BAR","vona_color_code":"GREEN","vals_level":1,"status_text":"Minor seismic activity in the past week."},{"volcano_code":"LJO","vona_color_code":"GREEN","vals_level":1,"status_text":" Minor seismic activity in the past week."},{"volcano_code":"PRE","vona_color_code":"GREEN","vals_level":0,"status_text":"In the past week about 40 earthquakes were detected. Most occurred on 11 September where about 25 were detected, they were located in Geitlandsjökull on Langjökull and the largest earthquake measured was a M2.9. On September 15 a M4.2 was detected without further escalation. It was located about 4.7 km south of Flosajökull on Langjökull. An earthquake of this magnitude in this area was last detected in June 2022."},{"volcano_code":"TOR","vona_color_code":"GREEN","vals_level":0,"status_text":"In the past week over 35 earthquakes have been detected, all below M1.5. In the past 2 weeks the seismicity has increased slightly with over 20 earthquakes detected per week vs 5-15. The seismicity is known to fluctuate between weeks. "},{"volcano_code":"REY","vona_color_code":"YELLOW","vals_level":2,"status_text":"Ground uplift continues at a slow and steady rate beneath Svartsengi. In the past 3 months about 5 cm of uplift has been measured. Seismic activity along the dike region is low. The most\nlikely scenario continues to be that a magmatic dike will propagate from Svartengi towards the Sundhnúkur crater row, which\ncan result in an eruption. The Icelandic Met Office hazard assessment is valid until 30 September and remains unchanged."}],"additional_notes":"Reykjanes Ridge: \nA small seismic swarm started about 55 km southwest of Eldey on the 15 Sept. at 10:00 PM with ~50 events detected, largest being two events of M3,2 and M3,1. The seismic swarm lasted ~8 hours. No further escalation. "}]