IMO raised the Aviation Color Code for Krýsuvík to Yellow on 24 February based on recent increased seismicity.
Intense seismic activity had been detected for the previous few days and since midnight through the generation of the report at 1107 more than 500 earthquakes had been recorded.
At 1005 a M 5.7 earthquake occurred 5 km W of Krýsuvík and at 1027 a M 4.2 was located in Nupshlidarhals, less than 1 km NW of Krýsuvík.
The seismic unrest was unusual for the area in the context of the unrest in the Reykjanes peninsula that began in January 2020.
Source: Icelandic Meteorological Office (IMO)