Today (23-November-2018) at 21:35 UTC an earthquake with magnitude of 3,5 took place in Hamarinn volcano (No GVP, is under Bárðarbunga volcano, also known as Loki-Fögrufjöll). Last unconfirmed eruption was in July 2011 and lasted ~12 hours. It resulted in a glacier flood and did not break the glacier. That eruption was only visible on harmonic tremor measurements.
Hamarinn volcano activity (green star to the left). Copyright of this image belongs to Icelandic Met Office.
It is possible that more activity is on the way, before the eruption in 2011 there was a increase in earthquakes in Hamarinn volcano. The same pattern seems to be happening now. The July 2011 eruption started without any earthquake activity, suggesting that magma is shallow in the crust already and doesn’t need any major change in pressure to start an eruption.
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It seems that since few days, there are more earthquakes under the Hekla ? What do you thing of it Jon ?
I am looking into that. I am not sure what it means for now. Hekla can erupt in a fissure like eruptions. I don’t have any idea how that looks like when it comes to earthquakes.