During the night of 13-February 2021 an earthquake with magnitude of Mw4,0 took place at 02:30 UTC. This earthquake is normal and is because of inflation in Bárðarbunga volcano after the eruption ended in 2015.
There is one of this earthquakes in Bárðarbunga volcano every few months and last earthquake with magnitude Mw3,9 took place on 21-December-2020 in Bárðarbunga volcano. This type of earthquake activity is going to continue in Bárðarbunga volcano for decades until next eruption happens in 20 to 100 years.