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On the 17th of September 2020 at 17:31:40 GMT, a magnitude M1.3 earthquake occurred in the Irish Sea approximately 2 km offshore Skerries, North Dublin. The earthquake occurred at a depth of 14 km. The epicentre location is indicated with a red circle in the map below, black lines denote major fault zones in and around Ireland. Earthquakes do occur regularly in the Irish Sea, however, it is not often that earthquakes are detected so close to Ireland’s east coast. The last detected earthquake to occur within 10 km of the east coast was the M2.4 event from the 18th of March 2013, occurring 6 km offshore Wexford.
The event was recorded by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:
On the 14th of May 2020 at 03:52:54 UTC, an earthquake of magnitude M0.6 occurred in the Irish Sea. The earthquake located approximately 20km east of the Isle of Man, and occurred at a depth of 3km. The epicentre location is indicated with a red circle in the map below, black lines denote major fault zones in and around Ireland. Events of this nature are not uncommon in the Irish Sea, with several small events (M < 1.1) detected near the Isle of Man in the past 5 years.