When I just think that Katla volcano had gone quiet. It starts a earthquake swarm to proof that I had it wrong.
This earthquake swarm in Katla volcano is not big. But the largest earthquakes where up to ML2.6 in size according to Iceland Met Office web page. This earthquake swarm is located in Katla volcano caldera, in the area that have been most active since July 2011. No harmonic tremor has followed this earthquake swarm.
The earthquakes in Katla volcano today. Copyright of this picture belongs to Iceland Met Office.
The tremor plot of the earthquake from Slysaalda SIL station. Copyright of this picture belongs to Iceland Met Office.
The earthquake swarm on Alftagröf SIL station. Copyright of this picture belongs to Iceland Met Office.
The earthquakes as they did appear on my geophone at Heklubyggð (Hekla volcano). This picture is released under Creative Common Licence. See the Licence page for more details.
This was most likely a small dike intrusion in Katla volcano caldera. But that seems to be the major driving force behind this earthquakes that are currently taking place in Katla volcano caldera. It is hard to know for sure if this earthquake swarm is going to continue or not. But this high earthquake activity in Katla volcano suggests that it is not far away from erupting. But it is impossible to know when a eruption might take place at current time.
Icelandic News about this earthquake swarm.
Smáskjálftar í Mýrdalsjökli (mbl.is, Icelandic)