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2024-05-16, M1.5, Rockall Trough

At 23:39:33 UTC on the 16th of May 2024 an M1.5 earthquake occurred in the Rockall Trough, in the North Atlantic ocean (see green circle on map below). The event occurred at a depth of about 14km. The earthquake locates approximately 150km northwest of Donegal, and about 35km south of the Hebrides Terrace Seamount. Earthquakes are regularly detected in this region, of which the largest was magnitude M4.0, occurring in April 1980.

The event was recorded and located by the Irish National Seismic Network (INSN) and can be seen in the waveforms plotted below. Station ‘DGL2’ in western Donegal commenced operation on 18th April 2024, and has already recorded several local earthquakes.

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:

2023-05-06, M2.5, Donegal

At 00:32 UTC on the 6th of May 2023 an M2.5 earthquake occurred at a depth of approximately 10 km. The event occurred near Glenveagh National Park in northwest Donegal, Ireland (see map below). The Irish National Seismic Network (INSN) operated by DIAS has received reports that the event was felt throughout the Donegal area.

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

If you felt this event, please consider making a report at https://www.insn.ie/you-felt-a-seismic-event/questionnaire/

The map below shows the locations from where the INSN received felt event reports. Nearly 300 reports of the event being felt or heard were received, particularly from Letterkenny, Ballybofey and Dungloe. Approximately 85% of respondents heard the earthquake, 76% felt the earthquake and 32% were awakened by the earthquake.

The earthquake was also detected by several Raspberry Shake seismometers operated in Ireland by citizens and schools. The plot below shows the recorded data, the distance between each station and the epicentre is shown in the top right corner of each sub-panel.

Below we show the seismogram and spectrogram for the the citizen station AM.R0FF0 (located in Sligo) as generated by the Raspberry Shakenet mobile app.

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

2022-08-12, M2.5, Celtic Sea

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:

2022-07-26, M0.3, Offshore Wexford

On the 26th of July 2022 at 23:33 UTC a magnitude M0.3 earthquake occurred offshore Wexford, locating approximately 12km east of Wexford town, at a depth of 3 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. This is the first Irish earthquake to be located using data from the recently installed underground seismic station at Mitchelstown Caves (IMIC). Earthquakes are regularly detected within county Wexford and the surrounding offshore regions. The largest earthquake detected in this area was M2.4, occurring on the 18th of March 2014 and locating 6km offshore Raven Point, Co. Wexford.

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

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:

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