Few weeks ago an earthquake swarm started west of Langjökull glacier and is on the edge of western fracture zone. That earthquake swarm then stopped and has now started again and it appears that the magnitude of the earthquakes is increasing. The magnitude has gone from mostly 1,0 and up to mostly 2,0.
The earthquake activity west of Langjökull glacier. Copyright of this image belongs to Icelandic Met Office.
This earthquake swarm has all the signs of being intra-plate earthquake swarm, but due to location of it’s hard to be sure if that is the case. No fault lines are document at this location, that means no major earthquake activity has taken place there for a long time.
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Over the last few days there has been increasing earthquake activity in Katla volcano. The increase is slow, but this is a increase in activity. This holds in line with increased glacier melt during the Icelandic summer. What appears to be different now is the phase the increase is happening. At the moment the earthquake activity has not yet reached last year activity levels.
Earthquake activity in Katla volcano for the last 48 hours. Copyright of this image belongs to Icelandic Met Office.
Largest earthquake in last 48 hours had the magnitude of 2,4 and took place in a minor earthquake swarm inside Katla volcano caldera. Since then there has been minor earthquake activity inside Katla volcano caldera, but compared to last year current activity is low. Other earthquakes that have happened have been smaller in magnitude.
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