Minor earthquake in Höfsjökull volcano. Continued earthquake activity in Tjörnes Fracture Zone

It has been quiet in Iceland for the past few weeks. Mostly due to bad weather. But that drops the SIL network ability to detect minor earthquake activity in Iceland.

Hofsjökull volcano

Hofsjökull volcano is among Iceland most quiet volcanoes. With no eruption documented in historical times. Hofsjökull volcano is also a interesting volcano. As it more like two volcanoes in one. Why that is I am not sure. Hofsjökull volcano is covered with a glacier that is up to 650 meters thick in the central caldera.

The earthquake in Hofsjökull volcano. Copyright of this image belongs to Icelandic Meteorological Office.

This earthquake was small. Just magnitude 1.3. But with the depth of 22,4 km. So it took place in the magma chamber, or close to it. Rather then any crustal earthquake activity. But it is hard to know for sure at the moment. During a normal year. Hofsjökull volcano can have up to 10 earthquakes during the year. Some years there are no earthquakes at all in Hofsjökull volcano.

Tjörnes Fracture Zone

Earthquake swarm that started on 20th of October in TFZ continues to this day. But currently the earthquake activity is just minor earthquakes at the moment. But the swarm is ongoing now for one month. There are also no signs of this earthquake swarm stopping. Even if the earthquakes are just minor ones for now.

Current earthquake activity in TFZ today and past few days. Copyright of this image belongs to Icelandic Meteorological Office.

I fully expect the earthquake activity to continue in TFZ. When it might stop is impossible to know for now. So keeping an eye of this area of TFZ is a good idea. The risk of large earthquake taking place in this area remains unchanged last I knew.