This Sunday is not quiet when it comes to earthquake activity in Iceland. Earlier today a small earthquake swarm started in Katla volcano. The largest earthquake in this swarm had the magnitude 2.3 according to the automatic SIL system. The largest earthquake did appear clearly on Skeiðflöt and Heklubyggð geophone stations. But Skeiðflöt geophone station is closest to the area where this earthquake swarm was taking place.
Earthquake swarm in Katla volcano. Copyright of this picture belongs to Iceland Meteorological Office.
The earthquake trace on Skeiðflöt geophone station. This is filtered at 1Hz. I have not located this earthquake trace (no P and S wave markers). This image is released under Creative Commons Licence. Please see CC Licence page for more details.
The earthquake trace from Heklubyggð geophone station. This is filtered at 1Hz. I have not located this earthquake trace (no P and S wave markers). This image is released under Creative Commons Licence. Please see CC Licence page for more details.
It is impossible to know what happens next in Katla volcano. But it is monitored heavily, so if anything happens. It is going to show up almost in real time on the internet.
GPS monitoring of Ice cauldron on Mýrdalsjökull glacier
In the news on Rúv yesterday (07.07.2012) they did tell about real time GPS monitoring of ice cauldron in Mýrdalsjökull glacier. But it is hoped that with this real time GPS monitoring they can give out warning sooner when a ice cauldron empties it self of the water it holds.
The news about this can be found here on Rúv News in Icelandic.
GPS-tæki komið í sigketilinn (Rúv.is, Icelandic, video)
hmmm
Sunday
08.07.2012 21:06:04 63.632 -19.142 1.1 km 2.7 70.22 5.4 km E of Goðabunga
http://en.vedur.is/earthquakes-and-volcanism/earthquakes/myrdalsjokull/#view=table
I think it is real, not on any site to be 2.7 M.
http://hraun.vedur.is/ja/alert/2012/jul/08/index.html
This earthquake has poor quality. It is less then ML2.7. I also did not see it on my geophones at Heklubyggð and Skeiðflöt.
Some ideas about the earthquakes around Skjaldbreið and Langjökull:
Wednesday 11.07.2012 08:58:18 64.643 -20.551 4.6 km 3.0 99.0 16.1 km
Are they tectonic?
Yes. I believe that they are tectonic in nature. Same goes for the earthquakes in SISZ. But there seems to be some type of tension going on in the area. I am not sure what it means.
Katla is very quiet at the moment
Its not very quiet today