The plot showing the continuous tremor at the Hítardalur seismic station between 05:00 PM and 06:00 PM on 2 January (image: Icelandic Meteorological Office) On Thursday, January 2nd, a tremor event was recorded between 5:00 PM and 6:00 PM, originating near Grjótárvatn. The tremor, lasting approximately 40 minutes, consisted of a series of continuous small earthquakes, most of which were too small to be precisely located. Only two earthquakes within the tremor sequence were located, occurring at a depth of about 15 km, with magnitudes of M1.5 and M1.8. In total, around 20 earthquakes were detected that day, all at depths of 15–20 km, with magnitudes ranging from M0.1 to M2.0. Yesterday morning, January 8th, the Icelandic Meteorological Office (IMO) held its monthly meeting to review recent activity across the country's volcanic systems. During the meeting, the increased seismic activity near Grjótárvatn was analyzed and possible explanations discussed. A recent analysis of seismic...