The effusive eruption at the volcano has already ended or has remained mostly calm since 18 September as lava flows have stopped.
During the eruption, instruments continued to detect a deflation over the eruption site as magma used to leave from the deep chamber and pushed its way up to the surface.
However, GNSS and InSAR instruments observed a new inflation on the Reykjanes peninsula since the end of September. This is likely reflecting a renewed magma intrusion and migration under the surface, supported also by continued deformation of the surface.
A swarm of small earthquakes occurred in late September, located in the south of Keilir area, that may be related to a new batch of magma rising inside the volcano’s conduits, although no new ground deformation has been detected during this time period.
The current inflation may not be associated with a new impending eruption.
This may take years or decades what will happens next at Reykjanes peninsula.
Source: Icelandic Meteorological Office volcano activity update 19 November 2021