Strong earthquake activity on Kolbeinsey Ridge

Yesterday (27.01.2017) and today (28.01.2017) has seen some strong earthquake activity on Kolbeinsey Ridge. Largest earthquake in this swarm had the magnitude of Mb4,6 according to EMSC (information here). This area, or area close to it possibly had a dike injection or an eruption in the year 1999. That was however never confirmed.

The earthquake swarm on Kolbeinsey Ridge. Green stars show earthquakes with magnitude above 3,0. Copyright of this image belongs to Icelandic Met Office.

The Mb4,6 earthquake as it appeared on my geophone in Böðvarshólar. This image is under Creative Commons Licence, please see CC licence website for more information.

There have been around 5 earthquakes with magnitude above 3,0, I don’t know exact numbers of earthquakes with magnitude around and above 3,0. Due the distance of this earthquake swarm from the SIL network it is difficult for Icelandic Met Office to estimate the numbers and magnitudes of the earthquakes that happen. The distance was around 85 km from Kolbeinsey Island and around 160 km from Kolbeinsey Island. It does appear that two earthquake swarm took place in this area for the last 24 hours, but not much else is known at the moment. This activity is currently ongoing at the moment (I think).


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