As most of you have noticed, Iceland have been really quiet lately. Well, now there seems to be a bit of activity in Iceland. So, here is the first activity report of Iceland on this blog.
Katla, or more to the point, Godabunga put in a short appearance;
Thursday 24.11.2011 15:39:13 63.630 -19.190 1.7 km 2.9 99.0 3.2 km ESE of Goðabunga
There also seems to have been a small tremor-spike (for being Godabunga);
This seems to a rather small thing, I would say that this is just an ordinary day in the life of Godabunga. But, sooner or later there will be a re-start of the runup for the real eruption of Katla. For the record, this is not the day for Katla.
Tjörnes Fracture zone has an ongoing quake swarm, there is no ongoing tremoring there so it seems to be tectonic only. So no signs of an eruption there. This behaviour is quite normal for TFZ, and can run for days. For the record, back in the 1870s there where at least 2 earthquakes of magnitude 7. So, this is on the smaller scale of what can happen in the area.
The odd activity at Svartárkot continues. Svartarkot is located next to the Ódáðahraun lava field, the massive Dyngjufjöll shield volcano and the Sveinagja Graben. All three of these features are part of Askja volcano. Ódáðahraun lava field from the Holocene is Icelands largest with more than 6000 square kilometres of lava. Dyngjufjöll is the largest shield volcano in Iceland, and the Sveinagja Graben, a part of the Askja arcuate fissure-swarm, is the site where the 1874-1875 eruption started. Anything happening here, even if it is small, is worthy of attention. Askja has after all had inflation happening in both the caldera and at the Herðubreið Tuyja. And during the last couple of months there have been earthquakes and harmonic tremoring that seems to have originated from the Sveinagja Graben and continued down to the southern parts of the Askja fissure swarm.
The new patterning is diffuse, but it is rather unusual for Askja and the Svártarkot SIL.