Day: August 2, 2018

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Considerable earthquake swarm in Katla volcano

Since early this morning (2-August-2018) there has been considerable earthquake swarm activity in Katla volcano. This earthquake swarm started yesterday (1-August-2018) at low rate but during the night and after a minor stop the earthquake rate increased and at the moment this earthquake swarm can be considered ongoing.


Green star is the magnitude 3,6 earthquake in Katla volcano. Copyright of this image belongs to Icelandic Met Office.

Largest earthquake so far had a magnitude of 3,7 and the second largest magnitude has been 2,2. Other earthquakes are smaller in magnitude at the moment. No change in harmonic tremor has been observed at the moment. There is a lot suggesting that glacier water from hydrothermal areas under Mýrdalsjökull glacier are now flooding into Múlakvísl glacier river. I got a report of that over facebook yesterday, but nothing has been confirmed officially at the moment.

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Glacier flood confirmed from Skaftárkatlar cauldron

It was confirmed today (02-August-2018) that glacier flood has started from Skaftárkatlar cauldron. According to the news the GPS monitoring station close the cauldrons started to drop around midnight. Around same time harmonic tremor started to change on nearby SIL stations.


Harmonic tremor on nearby SIL station due to glacier flood. Copyright of this image belongs to Icelandic Met Office.

It can take up to a week for the glacier flood to finish, but that depends on the amount of water in the cauldron that is emptying it self. According to the news the eastern Skaftákatlar cauldron is now emptying it self. It last did so three years ago.

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Slight increase in earthquake activity in Öræfajökull volcano

Today (1-August-2018) there seems to be a minor increase in earthquake activity in Öræfajökull volcano. What has also happened is that magnitude of earthquakes today has been slightly larger then in a normal week. Few magnitude 1,0 and larger and at least one magnitude 1,5 earthquake have happened so far.


Earthquake activity in Öræfajökull volcano (right corner, to the ocean). Copyright of this image belongs to Icelandic Met Office.

Current rate of earthquakes have dropped down to 50 earthquakes a week from earlier 100 earthquakes a week. This change might be normal for Öræfajökull volcano since this magma intrusion seems to be moving slowly inside the volcano. Regular earthquake activity continues to happen and there is no sign that is changing at the moment.

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+I want to visit a person in the UK but at the moment I can’t do so because I don’t have the money. 🙁