Overview of the small earthquake swarms in Iceland

Over the past few days there have been few minor earthquake swarms taking place in Iceland. None of the earthquake swarms have been large, all of them have been minor and no earthquake did reach the magnitude of 3,0 or larger.

The earthquake swarms in TFZ, Reykjanes peninsula and Bárðarbunga volcano. Copyright of this image belongs to Iceland Met Office.

Most of the earthquake activity that has been taking place has been happening in Bárðarbunga volcano, minor earthquake activity has been ongoing in the volcano and fissure since end of the eruption in February-2015. A swarm of small earthquakes took place on TFZ, none of those earthquakes reached magnitude 2,0. Most depth in this swarm was around 22 km, so magma might have been involved, this area is a rift valley. I don’t know of any documented eruption at this location, that does not mean it might not have happened. Minor earthquake swarm took place on the Reykjanes peninsula, one earthquake reached magnitude 2,8 with other earthquakes having smaller magnitude . The earthquake swarm took place in the volcano system of Krýsuvík. This earthquake swarm appears tectonic in nature rather then volcanic.

There has also been a minor earthquake swarm in Torfajökull volcano, it has been on the none-volcanic area between Torfajökull and Katla volcano. It’s unclear why this is happening, there is a chance this is a earthquake swarm in Katla volcano on the edge of the volcano system, or this is a earthquake swarm on the edge of the Torfajökull volcano system. I don’t have my maps so I can’t check for it.

Other then this it has been quiet in Iceland this week and for the past few weeks, this quiet might continue for the next few weeks to months.

Article updated at 23:45 UTC.