The report noted that seismic activity at the volcano had been above background levels during the previous four months. The Aviation Color Code was lowered to Green.
Activity did not escalate on 5 January and only one M 0.6 earthquake was detected.
Since the beginning of December there had been evidence of water drainage from the lake the earthquakes may have been related to the drainage, but it was not confirmed. The swarm consisted of seven earthquakes with magnitudes above 1, which was considered unusual. Grimsvotn | 3 January-9 January 2024 | New Activity / Unrest Cite this ReportĪ brief seismic swarm at Grímsvötn was recorded by the seismic network beginning at 1600 on 4 January, prompting Icelandic Meteorological Office (IMO) to raise the Aviation Color Code to Yellow (the second level on a four-color scale). Smithsonian / USGS Weekly Volcanic Activity Report for the week of 3 January-9 January 2024Īll times are local unless otherwise stated.
