Ground deformation measured during 16-22 Dec in the area of Fagradalsfjall (image: IMO)
The elevated seismic activity continues.
2000 earthquakes have been detected in total over the last 17 hours at 5-8 km depth suggesting that the flux of magma rising within the volcano is significant and the most likely scenario of an imminent eruption is considered to occur in Geldingadalir eruption site.
GPS instruments detected a rapid ground deformation, another tell-tale sign of an impending eruption, which is similar to the pre-eruption measurements before 19 March.
Source: Icelandic Meteorological Office volcano activity update 23 December 2021