Category: Magma

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Earthquake swarm in Bárðarbunga volcano

This morning (17-December-2018) an earthquake swarm started in Bárðarbunga volcano. Largest earthquake in this swarm had magnitude of 3,6. Other earthquakes have been smaller in magnitude.


Earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.

This earthquake activity is a sign that Bárðarbunga volcano has not slowed down on inflating. I don’t know how much the inflation is since I have not seen GPS data for Bárðarbunga volcano in a while.

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Earthquake swarm in Öræfajökull volcano

Today (8-December-2018) there has been a fresh earthquake activity in Öræfajökull volcano. This earthquake swarm was in the northern part of the caldera, or just outside it.


Earthquake activity in Öræfajökull volcano. Copyright of this image belongs to Icelandic Met Office.

Largest earthquake in this swarm had a magnitude of 2,6. Other earthquakes had a magnitude of 0,2 to 0,8. This is normal for Öræfajökull volcano in its current phase.

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Earthquake activity in Þórðarhyrna volcano (Thordarhyrna)

During the night of 3-December-2018 earthquake activity started in Þórðarhyrna volcano (no GVP profile, under Grímsvötn volcano profile). Largest earthquake in this swarm had a magnitude of 2,1 and second largest earthquake had a magnitude of 2,0.


Þórðarhyrna volcano is located south-west of Grímsvötn volcano. Yellow dots on this image. Copyright of this image belongs to Icelandic Met Office.

Last eruption in Þórðarhyrna volcano was in the year 1902 December to 1904 12-January and was a VEI=4 eruption. An eruption happened in Grímsvötn volcano at the same time.

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Two earthquake swarms in Öræfajökull volcano

Today (1-December-2018) two earthquake swarm took place in Öræfajökull volcano.


Earthquake activity in Öræfajökull volcano. Copyright of this image belongs to Icelandic Met Office.

Largest earthquakes in this two earthquake swarms had magnitude of 1,1. All other earthquakes are smaller in magnitude. What is unusual now is that there are two earthquake swarms happening in Öræfajökull volcano. In last few months only one area has been having earthquakes at time. It is worth keeping a eye out for this change if it holds.

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Earthquake activity in Grímsvötn (Grímsfjall) volcano

During the night of 23-November-2018 there was an magnitude 3,1 earthquake in Grímsvötn volcano (Grímsfjall). Only one aftershock appeared and it had a magnitude of 0,9.


Earthquake activity in Grímsvötn volcano (green star). Copyright of this image belongs to Icelandic Met Office.

No change happened on tremor plots following this earthquake activity. Last eruption in Grímsvötn took place in 2011.

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Strong sulphur smell from Sólheimajökull glacier (Katla volcano)

Today (21-November-2018) Icelandic Met Office issued a warning about strong sulphur smell from Sólheimajökull glacier and Jökulsá á Sólheimasandi (connected glacier river) that come from Katla volcano. People are advised to stay away from this area because if the sulphur smell. There hasn’t been any connected earthquake activity with this increase in sulphur smell.


Katla volcano is quiet. Copyright of this image belongs to Icelandic Met Office.

There is no earthquake activity and no change has been observed on harmonic tremor plots around Katla volcano at this moment. This is unlikely to change, since earthquake activity has been minimal in 2018.

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Two earthquakes in Bárðarbunga volcano

Today (12-November-2018) at 19:21 and 19:23 UTC two earthquakes took place in Bárðarbunga volcano. The first earthquake had a magnitude of 3,6 and the second earthquake had magnitude of 3,3. Other earthquakes that have happened so far have been smaller in magnitude.


Earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.

This earthquake activity is ongoing in Bárðarbunga volcano.

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Earthquake activity in Grímsvötn volcano

During the night there was an earthquake swarm in Grímsvötn volcano. Largest earthquake in this swarm had a magnitude of 2,6 and other earthquakes were smaller in magnitude.


Earthquake activity in Grímsvötn volcano. Copyright of this image belongs to Icelandic Met Office.

Yesterday (06-November-2018) there was also earthquake activity in Grímsvötn volcano but it was at lot smaller scale then what happened during the night. At the moment there are no signs that Grímsvötn volcano are about to erupt. There has not been any more earthquake activity today.

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New measurements confirm Öræfajökull volcano continues to inflate

This based on news from Rúv. I am not translating the news item it self. The link is at the end of this article in Icelandic.

According to latests news on Rúv. Öræfajökull volcano continues to inflate at an increased rate. This has resulted in larger earthquakes in recent months and larger energy release in those earthquakes. Deformation has been clearly detected in Öræfajökull volcano and magma is now collecting just above 5 km depth according to measurements. Earthquake activity has increase compared to 2017 and seems to be increasing at the moment.

Rúv News

Kvika að safnast saman undir Öræfajökli (Rúv.is, Icelandic)

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Magnitude 4,6 earthquake in Bárðarbunga volcano

At 00:08 UTC on 23-October-2018 a magnitude 4,6 earthquake took place in Bárðarbunga volcano. This is the strongest earthquake in Bárðarbunga volcano for at least three months. A second earthquake with a magnitude of 3,5 happened at 00:12 UTC. This earthquake activity had earlier smaller earthquakes happening in Bárðarbunga volcano. It started yesterday (22-October-2018) with few minor earthquakes.


Earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.

Other earthquakes in this earthquake activity were smaller in magnitude. This type of earthquake activity in Bárðarbunga volcano is now common after the end of the eruption in 2015.

Update on 24-October-2018

Icelandic Met Office has revised the magnitude of few of the earthquakes that happened in Bárðarbunga volcano. Now the magnitudes of the largest earthquakes are magnitude 3,9, magnitude 4,6 and magnitude 3,5.


Updated map of the earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.

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Article updated at 15:17 UTC on 24-October-2018.