Update at 12:03 UTC on earthquake swarm in Nafir volcano, TFZ, 19-February-2018

Information in this article is going to go outdated quickly.

Uncertainty level has been declared in Grímsey island and nearby area due to the strong earthquake activity in the night. Largest earthquake during the night was a magnitude 5,2 the second largest earthquake had the magnitude of 4,5 at the moment. Based on how it appeared on my geophone it possibly close to being a magnitude 5,0 earthquake. Revision takes time when a large earthquake swarm like this happens. The largest earthquake was felt over a wide area in north, north-east and north-west Iceland according to reports by Icelandic Met Office.


Current earthquake swarm in Nafir volcano east of Grímsey island in the TFZ. Copyright of this image belongs to Icelandic Met Office.


Earthquake activity is high at the moment. Copyright of this image belongs to Icelandic Met Office.

There is currently no end in sight for this earthquake swarm. It remains unclear if this is due to a possible volcano event in the making or just tectonic activity. Currently there is no eruption happening at this location. Unlike what appears on the live updated maps all of the earthquake activity is located east of Grímsey island. The SIL network has problems properly locating the earthquakes automagically when a large earthquake swarm like this happens.

This entry was posted in Earthquakes, Monitoring, Nafir-Skjálfandadjúp, Swarm, TFZ, Tjörnes Fracture Zone, Volcano. Bookmark the permalink.

9 Responses to Update at 12:03 UTC on earthquake swarm in Nafir volcano, TFZ, 19-February-2018

  1. Radek says:

    That is going to be interesting

  2. Gill Pearce says:

    Might just die down now. That’s a lot of pressure released now.

  3. Espenb says:

    Katla and øafjall is responding 2.8 and 2.5… Can this be some conection?

    • Radek says:

      dont forget to Barda she could be angry

    • Not connected but there might be earthquake swarm in Katla volcano soon. This earthquakes are of that type. But it is impossible to know for sure if this starts something or just stops.

    • Z says:

      Perhaps a bit difficult to tell what’s going on in detail, since Autmannsbunga station(s) are totally down, and the closest working stations (i.e. Slysaalda and Lagu Hvolar) are pretty far off from the centre of activity?

  4. Jonas Nilsson says:

    The likelihood of other event in the neighborhood should be higher due to movements, strains and other things in the zones. Hisstory fom some atrticle seems to strengthen this hypothesis.

  5. Richard Oliver says:

    What article is that Jonas

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