A minor earthquake swarm took place in Bárðarbunga volcano today (21-august-2019). Largest earthquake had a magnitude of 3,5 and other earthquakes that happened are smaller in magnitude.
The earthquake in Bárðarbunga volcano (green star). Copyright of this image belongs to Icelandic Met Office.
This earthquake was in the north-east part of the caldera. In last few months earthquake activity has been increasing in that part of the caldera. Earthquake activity in Bárðarbunga volcano is due to magma inflating the volcano.