Today (27-July-2020) a small earthquake swarm took place in Katla volcano. This was just normal earthquake swarm at shallow depth that is often the case with earthquakes in Katla volcano.
The earthquake activity in Katla volcano. Copyright of this image belongs to Icelandic Met Office.
Largest earthquake in this swarm had a magnitude of Mw3,4 and the second largest earthquake had a magnitude of Mw2,8. Other earthquakes were smaller in magnitude. No harmonic tremor change was seen before or after the earthquakes took place. This earthquake has been connected to emptying of glacier water filled cauldron in Mýrdalsjökull glacier. This happens frequently in the summer.
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