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2023-12-10, M1.3, Donegal

At 06:48:00 UTC on the 10th of December 2023 an M1.3 earthquake occurred on the Fanad peninsula in northern Co. Donegal, Ireland. The earthquake occurred at a depth of approximately 5 km, and the epicentre was approximately 5 km east of Kerrykeel (see map below). The Irish National Seismic Network (INSN) operated by DIAS has received several reports that the earthquake was experienced by members of the public near Kerrykeel, whereby most stated that they heard a loud, thunder-like noise. The Fanad peninsula experiences regular seismic activity; the most recent earthquake to occur near Kerrykeel was M1.4 in August 2017, and the largest earthquake on the Fanad peninsula was M2.4 in January 2012.

The map below shows the location of felt reports from the public.

The event was recorded by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:

2023-05-10, M2.4, Goban Spur, North Atlantic

On the 10th of May 2023 at 16:21:53 UTC, a magnitude M2.4 earthquake occurred near the Goban Spur, in the Porcupine region of the North Atlantic ocean, locating approximately 350km south-south-west off the coast of Kerry. The earthquake occurred at a depth of 10 km. The location of the epicentre is indicated with a red circle in the map below. 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. Several earthquakes of similar magnitudes (between M2.0 and M4.4) have been detected in this region since 1980. Previously, the most recent earthquake detected from this area occurred on 2022-03-10 (M3.4, in the Porcupine Abyssal Plain), and the largest earthquake detected (since 1980) in the Porcupine region was M4.4, occurring on the 17th of February 1980.

The event was recorded by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:

2023-03-04, M3.0, Rockall Plateau

On the 4th of March 2023 at 03:45 UTC a magnitude M3.0 earthquake occurred in the Rockall Plateau in the North Atlantic, approximately 600km northwest of Donegal. 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 red lines. While earthquakes in the Rockall Trough are regularly detected by the INSN, only one previous event has been detected from the Rockall Plateau – a M3.5 earthquake from the 10th of January 2016. As the nearest land-based seismometers are 500km from the Rockall Plateau, only larger magnitude (M2.5+) events are expected to be detected from this region. Earthquakes with magnitudes up to M4 are known to occur in the Rockall Trough.

The event was recorded by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:

2023-02-24, M3.4, Wales

On the 24st of February 2023 an M3.4 earthquake occurred at 23:59:41 UTC approximately 30 km northwest of Newport in Wales, United Kingdom, see map below. The British Geological Survey (BGS) reported that the event was felt throughout the region, mainly within around 40 km of the earthquake epicentre.

The event was recorded by seismic stations in the Irish National Seismic Network (INSN), see figure below.

More information about the earthquake is available at the following resources:

https://www.emsc-csem.org/Earthquake/earthquake.php?id=1228525

https://earthquakes.bgs.ac.uk/earthquakes/recent_events/20230224235706.htm

2022-07-25, M0.9, Donegal

On the 25th of July 2022 at 02:35 UTC a magnitude M0.9 earthquake occurred in northern Donegal, locating 12km northeast of Letterkenny, approximately 1 km beneath Lough Swilly. 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. Earthquakes with magnitudes up to M2.5 are commonly detected in Donegal; the most recent earthquake detected in this region was M0.6 on the 22nd of June. The largest onshore Irish earthquake recorded by the INSN was M2.5, occurring on the 26th of January 2012 on the Fanad Peninsula in Donegal .

The event was recorded by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:

2022-04-17, M2.5, North Atlantic

On the 17th of April 2022 at 18:48 UTC a magnitude M2.5 earthquake occurred in the North Atlantic, approximately 90km NW of Donegal, locating south of the Rockall Trough. 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. The most recent detected earthquake at this location was M0.7, occurring on the 6th of March 2022. Further to the north in the Rockall Trough, earthquakes with magnitudes up to M4.0 have been detected regularly since 1980.

The event was recorded by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:

2022-03-21, M5.2, North Sea

On the 21st of March 2022 at 06:32 UTC a magnitude M5.2 earthquake occurred in the North Sea, approximately 205 km WNW of Bergen, Norway. The earthquake located with a depth of 10 km and was reported felt from the western parts of southern Norway. The earthquake location is indicated by the red circle in the map below. The North Sea has low to intermediate seismicity with the majority of it occurring along the Norwegian coastline. Events are generally below M3 however a similar magnitude event was recorded in the same region on the 24th January 1927.

The event was recorded by seismic stations worldwide, including stations in the Irish National Seismic Network (INSN) (see figure below). The first seismic waves originating from the North Sea earthquake arrived in Ireland ~2 minutes after the event origin.

For more information on the North Sea earthquake please see these links:

https://earthquake.usgs.gov/earthquakes/eventpage/us6000h6bi/executive

https://www.emsc-csem.org/Earthquake/earthquake.php?id=1109087

https://nnsn.geo.uib.no/nnsn/#/news

2022-03-10, M3.4, North Atlantic

On the 10th of March 2022 at 10:57 UTC a magnitude M3.4 earthquake occurred in the Porcupine Abyssal Plain in the North Atlantic. The earthquake located with a depth of 15 km and is indicated by the red circle in the map below. 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 previous two earthquakes from this area were detected in 2020 and 2015 (M2.5 and M2.4), and the largest earthquake detected (since 1980) in the Porcupine region was M4.4, occurring on the 17th of February 1980.

The event was recorded by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:

2021-11-16, M3.3, Scotland

On the 16th of November 2021 at 01:44 UTC a magnitude 3.3 earthquake occurred in Western Scotland. The earthquake located with a depth of approximately 6 km and is indicated by the red circle in the map below. There have been reports of the event being felt in Scotland and Northern Ireland.

The event was recorded by the stations of the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:

Listen to Dr Martin Möllhoff discussing this event on RTE Radio 1’s Morning Ireland show here:

https://www.rte.ie/radio/radio1/clips/22030318/

More information is available from:


https://earthquake.usgs.gov/earthquakes/eventpage/us7000fugg/executive

https://www.emsc.eu/Earthquake/earthquake.php?id=1062853

http://www.earthquakes.bgs.ac.uk/earthquakes/recent_events/20211116014340.html#page=summary

2021-03-31, M2.6 & M2.3, Rockall Trough

On the 31st of March 2021 at 02:47:08 UTC (03:47:08 local time), a magnitude M2.6 earthquake occurred in the Rockall Trough near the Hebrides Terrace Seamount, approximately 210 km north-northwest of Ireland. The epicentre location is indicated with a red circle in the map below, black lines denote major fault zones in and around Ireland. The earthquake occurred at a depth of 10 km, and was preceded by a magnitude M2.3 earthquake at the same location, occurring at 00:05:02 UTC (01:05:02 local time). Although earthquake detection rates in the Rockall Trough are lower than those of the Irish Sea, several events with magnitude M>2.0 have been detected in this region, most notably from 1980, when an earthquake of magnitude M4.0 occurred near the Hebrides Terrace Seamount.

The event was recorded by the stations of the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below:

Past Seismograms
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Live Seismograms
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DSB - Dublin
VAL - Kerry

Past Spectrograms
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Live Spectrograms
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ITIP - N. Tipperary
IMAY - Mayo