Earthquake swarm in Tungnafellsjökull volcano

There is currently ongoing interesting earthquake swarm activity in Tungnafellsjökull volcano. This earthquake activity appears to be taking place due to magma injection at depth into the volcano. Currently the earthquake activity doesn’t appear so clearly on the Icelandic Meteorological Office earthquake maps. I am not sure why that is, the largest earthquake so far has had the magnitude of 2,3 at the depth of 0,5 km so activity is already rather shallow, deepest activity had the depth of 17,5 km. Earthquake activity started in Tungnafellsjökull volcano in the year 2012, before that earthquake activity had taken place in Tungnafellsjökull volcano following an eruption in Bárðarbunga / Grímsfjall volcano in the year 1996 [map here of Week 41 – 1996]. Current earthquake activity is not based on any such event.

Earthquake activity in Tungnafellsjökull volcano. Copyright of this image belongs to Icelandic Meteorological Office.

Tremor activity showing minor earthquakes taking place in Tungnafellsjökull volcano (most likely) over the past few hours. Copyright of this image belongs to Icelandic Meteorological Office.

I am not sure yet what is happening in Tungnafellsjökull volcano. But data in mounting and suggesting that magma is about to start flowing into the volcano at faster rates then before (via dike intrusions). Tungnafellsjökull volcano has not erupted in historical times (at least no eruption is documented) so it is impossible to know for sure what happens next in this volcano. If an eruption where to take place it would be mostly basalt based on post sub-glacier eruptions (when they erupted is not known). Current earthquake activity might die down as it did in the year 2012 when (and earlier this year [2013] also) this swarm like activity at depth (15+ km) started to happen.

Blog post updated at 04:36 UTC.
Blog post updated at 04:46 UTC.