New earthquake swarm in Fagradalsfjall volcano and in Þorbjörn mountain (Reykjanes volcano)

This article is going to get outdated quickly.

Current activity is also complicated and might not behave in the same way as earlier eruptions did. Largest earthquakes at writing of this article have had magnitude of Mw3,5 and Mw4,5. Larger earthquakes can be expected without warning. There have been around 1000 smaller earthquakes at the writing of this article.

Green stars close to Þorbjörn mountain and a lot of red dots in south part of Fagradalsfjall volcano. There is also green to west of Þorbjörn mountain.
Earthquake activity in Fagradalsfjall volcano and Þorbjörn mountain. Copyright of this image belongs to Icelandic Met Office.

There is a good chance this events are not going to behave the same way as happened in earlier eruptions, because the location is little bit difference and that can result in a lot of change on what happens when magma pushes it self up through the crust. The earthquake activity close to Þorbjörn might be a mixed earthquake activity of tension breaking earthquakes and magma pushing it self up. GPS data doesn’t show any inflation close to Þorbjörn mountain at the writing of this article.

Earthquake activity is increasing in south part of Fagradalsfjall volcano, this is area in Nátthagi, Nátthagakriki and other nearby area. There is a dyke intrusion in that area and has been a while. That dyke intrusion might be about to erupt. There is a lot of uncertainty going on at the writing of this article. There is also a pattern of high and low in the earthquake activity, this has been the pattern in the earthquake activity before the earlier eruptions.

I’ll write updates about this activity as needed. It might take a while, since I always try to figure out what is going on before an article is written.

Magnitude Mw4,9 earthquake in Bárðarbunga volcano yesterday (24. October 2023)

Yesterday (24. October 2023) at 22:19 UTC an earthquake with magnitude of Mw4,9 took place in Bárðarbunga volcano north eastern part of the volcano. This time it was not in the caldera as is the most common location for this earthquake activity.

Green star in Bárðarbunga volcano, in Vatnajökull glacier. This green star is located slightly to the north east of the main crater of Bárðarbunga volcano. Few yellow dots are around the green star, showing smaller earthquakes.
Earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.

This is a inflation connected earthquake activity in Bárðarbunga volcano. This is the second earthquake this year that reaches magnitude of Mw4,9. There is no risk for an eruption in Bárðarbunga volcano at current time.