During the early hours of 19-November-2016 a strong earthquake swarm took place in Bárðarbunga volcano. This is the strongest earthquake swarm in Bárðarbunga volcano for a long time now. Strongest earthquake had the magnitude of 4,0, other magnitudes where 3,5 and 3,1. All other magnitudes where smaller.
This earthquake activity suggests that pressure is increasing fast inside the volcano. I don’t know how much Bárðarbunga volcano has inflated since September-2015 but that must be considerable amount since a earthquake of magnitude 4,0 means a slip of few millimetres (I don’t have the information of much movement happens when a earthquake happen. I didn’t find the data about it). Over the past one year there has been a lot of earthquakes taken place in the Bárðarbunga volcano caldera, suggesting a rapid inflation of the volcano. It is not known if this is going to result in a eruption soon or sometimes later, all that is known is that magma is flowing into shallow magma chamber from deep within the volcano.
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Article updated at 22:42 UTC. Added a missing part.