Today (18-October-2017) at 06:00 UTC (Icelandic time) people of Grímsey Island got a rude awaking when a magnitude 3,8 to 3,9 earthquake took place. At 05:01 UTC a magnitude 2,9 earthquake had taken place. For the past 48 hours total of 105 earthquakes have taken place in the Tjörnes Fracture Zone. The largest earthquake took place in what seems to be north part of Grímsey Island, there is no population in that part of Grímsey Island but the population lives only few hundred meters away.
The earthquake activity in Tjörnes Fracture Zone in Grímsey Island. Copyright of this image belongs to Icelandic Met Office.
This earthquake activity started in this part of the Tjörnes Fracture Zone on 05-October-2017 as I wrote about here. Since then it is has been continuously ongoing, for a time it looked it was slowly stopping but the earthquake this morning increased the activity again. Since around 19:00 UTC this earthquake swarm seems to have slowed down a bit again, but the earthquake swarm is still ongoing as of writing of this article. More strong earthquakes in this area cannot be ruled out.
Donations
Please remember to support my work. Donations are my main source of income from my work here, along with small advertisement revenue and income from what people buy from Amazon with the banners I have on my websites. Thanks for the support. 🙂
Seems to be some activity near Askja?
http://hraun.vedur.is/ja/drumplot/drumplot/ask_highpass_2.0.png
Nothing hugely exciting or uncommon, but it’s something.
Some more spiky stuff went on late last night. This episode has not been recognized as earthquakes/tremor by the IMO, however. Perhaps wind noise.
https://i.imgur.com/Gubtgck.png
And not a single EQ recorded in Myrdalsjökull for over 2 days. We haven’t seen that little activity there in a long time.
Earthquake swarm commenced in Selfoss. Not seen one there for a while.
Well, that was a bit refreshing! Iceland has been kind of boring lately. Geology-wise, that is.
What is going on in the Selfoss area I see a star and lots of red dots?
Just normal SISZ earthquake swarm. This area is not volcanic (at least not normally) so there is no risk of an eruption.