Reykjanes volcano update: Inflation on the Reykjanes peninsula continues, 5 cubic meters magma intruding per second

nterferogram (InSAR) for the period 28th of October – 6th of November shows that deformation in that period is around 7 cm. SW of Mt. Þorbjörn is an offset in the deformation signal caused by fault movements by earthquakes. (image: IMO)

nterferogram (InSAR) for the period 28th of October – 6th of November shows that deformation in that period is around 7 cm. SW of Mt. Þorbjörn is an offset in the deformation signal caused by fault movements by earthquakes. (image: IMO)

The latest data show that uplift of the area continues at similar rates as during the past days, caused by probably relatively steady rates of magma intruding at shallow 5 km depth into a horizontal intrusion (sill) underneath the area near Thorbjörn mountain.
The latest estimate is that this averages to 5 cubic meters per second, since the beginning of the crisis on 27 October 2023.

The Icelandic Met Office (IMO) detected „approximately 1200 earthquakes in the last 24 hours, most of them in the area between Þorbjörn and Sýlingafell, similar to the day before.“ It should be noted that the vast majority of these quakes are very small, below magnitude 2.0 and many even smaller below magnitude 1.0.“

„The largest quake was M3.4 at 12:31 am early this morning just south of Þorbjörn. „The seismic activity continues at the same depth as before. It is likely that seismic activity will continue, and be episodic in intensity, while magma accumulation is ongoing.“