On the 12th of August 2022 at 00:30 UTC a magnitude M2.5 earthquake occurred in the Celtic Sea, approximately 200km south of Mizen Head, Co Cork. The earthquake located with a depth of 10 km. In the map below the epicentre of the earthquake is indicated with a red marker. Major fault zones in and around Ireland are shown with black lines. While earthquakes are known to occur in this region, it is not often that they are detected. As almost all seismometers are land-based, only larger magnitude events (M > 2) are seen from this region. The most recent earthquake detected in the Celtic Sea was M2.5, occurring on the 13th of July 2022, and the largest earthquake detected (since 1980) in the Celtic Sea was M2.9, occurring on the 27th of May 2019.
The event was recorded by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:
