Yesterday (18-November-2021 and on 17-November-2021) an earthquake swarm took place in Brennisteinsfjöll volcano. Two of the largest earthquakes where Mw3,3 magnitude in size.
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Earthquake in Brennisteinsfjöll volcano
On 24-May-2021 at 21:36 UTC an earthquake took place in Brennisteinfjöll volcano. The magnitude of this earthquake was Mw3,6 and this earthquake was felt in Reykjavík area.

There have been few smaller earthquakes in this area since the largest earthquake, but other than that it has been quiet. This earthquake is believed to have happened because of stress changes on the Reykjanes peninsula because of the eruption in Fagradalsfjall mountain.