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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.

2024-04-02, M7.4, Taiwan

On April 2, 2024, at 23:58:11 UTC, a powerful earthquake measuring M7.4 struck the eastern coast of Taiwan, at a depth of 35 km (refer to the map below for the location). 13 minutes later, a strong aftershock of M6.5 also occurred. This seismic activity was caused by reverse faulting near the boundary where the Philippine Sea Plate is subducting beneath the Eurasian Plate. At the time of writing, there have been 7 confirmed fatalities and numerous injuries reported. The earthquakes resulted in significant damage to buildings and widespread power outages.

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

More information is available at the below resources:

https://earthquake.usgs.gov/earthquakes/eventpage/us7000m9g4/executive

https://emsc-csem.org/Earthquake_information/earthquake.php?id=1641639

2024-01-01, M7.5, Japan

On the 1st of January, 2024, a M7.5 earthquake occurred on the west coast of Japan, at a depth of 10 km (see map below). A series of aftershocks have also occurred. At the time of writing 48 deaths have been reported with major damage to roads and houses on the the west side of the island.

Japan experiences high seismic activity due to the subduction of the Pacific Plate beneath its eastern coast. However, the recent event occurred along the less seismically active western coast, where certain shallow faults accommodate broader plate movements. Shallow earthquakes, such as this one, typically lead to more pronounced surface ground shaking compared to deeper earthquakes, as the energy is released closer to the Earth’s surface.

The seismic stations of the Irish National Seismic Network (INSN), which is managed by the geophysics section in the School of Cosmic Physics at DIAS, detected the M7.5 earthquake, see figure below.

More information is available at the below resources:

https://earthquake.usgs.gov/earthquakes/eventpage/us6000m0xl/executive?utm_medium=email&utm_source=ENS&utm_campaign=realtime

https://www.data.jma.go.jp/multi/quake/quake_detail.html?eventID=20240101162429&lang=en

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:

2023-10-07, M6.3, Afghanistan

On the 7th of October 2023 at 07:12:50 UTC an M6.3 earthquake occurred in Afghanistan at a depth of 10km (see map below for the earthquake epicentre, marked with a red circle). The earthquake struck in western Afghanistan near the city of Herat, close the Iranian border. Media reports estimate hundreds of deaths and thousands of causalities with rescue efforts still ongoing.

Afghanistan and the Middle East are prone to earthquakes due to the interaction of several large tectonic plates (Arabia, Eurasia, India and Africa). These interactions result the region experiencing several major geological processes such as subduction, faulting, mountain formation and stretching of the Earth’s crust.

The M6.3 earthquake was recorded by seismic stations operated by DIAS in the Irish National Seismic Network (INSN), see figure below.

Further information can be obtained at the following links:

https://earthquake.usgs.gov/earthquakes/eventpage/us6000ldpm/executive?utm_medium=email&utm_source=ENS&utm_campaign=realtime

https://www.emsc-csem.org/Earthquake_information/earthquake.php?id=1563081

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:

2023-02-06, M7.8, M7.5, Turkey

On the 6th of February 2023 at 01:17:35 (UTC) an M7.8 earthquake occurred in South-Eastern Turkey (see map below). The event effected Turkey, Syria and surrounding areas. The earthquake struck 30 km WNW of Gaziantep, Turkey and 108 km NNW of Aleppo, Syria, both of which are densely populated areas. Several strong aftershocks have also been observed in the region, notably a magnitude M7.5 about 100km north of Gaziantep at 10:24:49 (UTC) the same day. Over five thousand deaths and many injured, largely due to building collapse, have been reported. The M7.8 and M7.5 earthquakes occurred at depths of 18km and 10km respectively. Such large, shallow earthquakes produce significant ground shaking.

For a radio interview on RTE Radio 1 titled “Why is Turkey so prone to earthquakes?” with Chris Bean, Head of Geophysics at DIAS follow this link: https://www.rte.ie/radio/radio1/clips/22208567/

Chris Bean also talked on The Pat Kenny Show on Newstalk radio, the clip can be accessed here: https://www.insn.ie/wp-content/uploads/2023/02/The-Paty-Kenny-Show-7th-Feb-2023-Chris-Bean.mp3

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

More information about the M7.8 earthquake is available at the following resources:

https://earthquake.usgs.gov/earthquakes/eventpage/us6000jllz

https://www.emsc-csem.org/Earthquake/earthquake.php?id=1218444

Information about the M7.5 earthquake is available at these sites:

https://earthquake.usgs.gov/earthquakes/eventpage/us6000jlqa

https://www.emsc-csem.org/Earthquake/earthquake.php?id=1218771

2023-01-09, M7.6, Indonesia

On the 9th of January 2023 an M7.6 earthquake occurred in the Tanimbar region of Indonesia (see map below). Several aftershocks were also reported after the powerful quake that was also felt in some parts of northern Australia.

Indonesia is positioned at the boundary of 3 tectonic plates (the Indian-Australian, Eurasian and Pacific plates). The plate boundaries are long and found beneath the ocean, meaning large and shallow earthquake can be generated from this zone that may potentially generate tsunami.

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

More information is available at the following resources:

https://www.bmkg.go.id/berita/?p=peta-isoseismal-gempabumi-maluku-tenggara-barat-10-januari-2022&lang=ID&s=detil

https://earthquake.usgs.gov/earthquakes/eventpage/us7000j36j/executive?utm_medium=email&utm_source=ENS&utm_campaign=realtime

https://www.emsc-csem.org/Earthquake/earthquake.php?id=1208699

2022-12-20, M6.4, California

On the 20th of December 2022, an M6.4 earthquake occurred in the United States of America at 10:34:24 UTC approximately 15km WSW of Ferndale, California (see map below). At least two deaths have been recorded and several injuries. The earthquake also caused damage to buildings and interrupted the power and water supply in the area.

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

More information is available at the following resources:

https://earthquake.usgs.gov/earthquakes/eventpage/nc73821036/executive

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