Today (22-November-2020) at 11:08 UTC an earthquake with magnitude Mw3,1 took place in Katla volcano. No change in harmonic tremor was seen after this earthquake and no other earthquake activity has happened after this earthquake besides a one earthquake with magnitude Mw1,2 at 13:31 UTC.
The earthquake in Katla volcano. Copyright of this image belongs to Icelandic Met Office.
Current activity in Katla volcano is below normal background activity for this time of the year. It has been a quiet year for Katla volcano and I am not expecting any change to happen soon.
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After months of being quiet there has now been new earthquake activity in Öræfajökull volcano. The earthquake activity that took place was all just minor earthquakes but the deepest of them had a depth of 14 km and the second deepest had a depth of 12 km. Other earthquakes where at shallower depth.
Earthquake activity in Öræfajökull volcano. Copyright of this image belongs to Icelandic Met Office.
It is not possible to know what is going on in Öræfajökull volcano because what happens before an eruption is not documented in any details and the documents that exists today are old and the oldest documents of an eruption in Öræfajökull volcano are getting close to 660 years old. The younger documents are only 293 years old. This earthquake activity seems to be over at the writing of this article but it might resume without warning at any time.
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This evening (15-november-2020) an earthquake swarm started in Hengill volcano. It is unclear if this earthquake swarm is because of water injection in this area of just normal earthquake swarm.
The earthquake swarm in Hengill volcano. Copyright of this image belongs to Icelandic Met Office.
The largest earthquake in this swarm had a magnitude Mw3,3 currently. This earthquake swarm might be ongoing even if it seems to have stopped at the writing of this article. The largest earthquake was felt in Reykjavík, Hveragerði, Selfoss and other nearby towns.
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Today (11-November-2020) a swarm of small earthquakes took place north of Grindavík town in the Reykjanes volcano. This where all small earthquakes and largest earthquake had a magnitude of Mw1,7. At the writing of this article Icelandic Met Office website lists 76 earthquakes on Reykjanes peninsula.
The earthquake activity in the Reykjanes volcano. Copyright of this image belongs to Icelandic Met Office.
There is not a big change in the GPS data but there is a small change that suggests that Krýsuvík volcano has started to inflate more after the magnitude Mw5,6 earthquake. The GPS data can be viewed at University of Iceland GPS Reykjanes time series.
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