Today (20-February-2019) there has been a minor earthquake swarm in Tungnafellsjökull volcano. Largest earthquake in this swarm had a magnitude of 1,2 and other earthquakes where smaller in magnitude. Total of five earthquakes were detected.
The earthquake activity in Tungnafellsjökull volcano (north-east of Bárðarbunga volcano). Copyright of this image belongs to Icelandic Met Office.
It is unclear why this earthquake activity is happening. There is possible that some dyke intrusion is happening in the volcano but evidence remain unclear. This might also be crustal adjustment after Bárðarbunga volcano eruption in 2014 to 2015. I don’t think anything more is going to happen besides earthquake activity. Last eruptions happened sometimes 10.000 to 12.000 years ago and those are uncertain.
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What is the name for the feature north of Aska? It often shows seismic activity but is never mentioned in your posts.
This is Herðurbreiðartögl and Herðubreið. The activity at the moment is just minor earthquakes and its always going on in this area. You can find the category for this area here.
http://icelandgeology.net/?cat=166