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On the 7th December 2020 at 08:29:17 UTC a magnitude M0.6 earthquake occurred offshore Co. Donegal. The earthquake epicentre located approximately 12 km east of the island of Inistrahull, and 15 km northeast of the Inishowen peninsula. The earthquake occurred at a depth of 3 km. This is first time in which an event has been detected offshore northern Donegal, although several events have previously been detected offshore Antrim near Rathlin Island, and around the Scottish island of Islay. 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.
The event was recorded by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below: