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Category Archives: Recent Local Earthquake
On the 7th April 2019 at 23:58:19 local time (22:58:19 UTC) an earthquake of magnitude 2.4 occurred in Donegal. The location of the epicentre is 54.53N, 8.62W, see figure below. The event was felt widely by members of the public around the Killybegs area in the south west of Co. Donegal. The eartqhauke was detected automaticaly by the Irish National Seismic Network (INSN) which is operated by the Dublin Institute for Advanced Studies (DIAS) in co-operation with the Geological Survey Ireland (GSI). Events of this nature are not uncommon in the region, however earthquakes with magnitudes larger than 2 are recorded only every few years onshore Ireland or near it’s coast. Follow this link to listen to a radio interview given on the 8th April by Dr. Martin Möllhoff, Director of Seismic Networks at DIAS, on the RTE Radio 1 programme Drivetime.
The event was recorded on the stations of the Irish National Seismic Network (INSN) see seismic traces below. Stations from the BGS network in the UK detected the event as well.
The INSN received more than 100 reports from members of the public who felt the earthquake. The map below shows the location of some of these reports, if you experienced this event please consider clicking here to fill out a small report. Thank you!
On the 17th February 2018 an earthquake with magnitude 4.4 occurred at 14:31:07.6 UTC at a depth of 7.4km in South Wales about 20km north of Swansea, see map below. According to the BGS hundreds of members of the public submitted felt reports. Events of this magnitude happen in the UK only about every 2 to 3 years. The BGS reports that this is the biggest event in the area since a magnitude 5.2 earthquake in 1906.
The earthquake was recorded at stations of the Irish National Seismic Network (INSN), see seismic waveforms below (select figure to enlarge).
Further information about this event is available from the following webpages:
The drumplot below shows the unfiltered seismic signal recorded on the 17th February 2017 at INSN station DSB in the Dublin mountains. The high amplitude low frequency signals between midnight and 1 a.m. are the surface waves of the M7.2 Mexico earthquake that occurred on the 16th February 2018 at 23:39:39, see https://www.insn.ie/2017-02-16-m7-2-mexico for more details on that event. The magnitude 4.4 event with epicentre in South Wales can be seen with much higher frequency content around 14:32.
More information about the INSN is available via this link.
On the 2nd August at 05:46 UTC (06:46 local time) an earthquake of magnitude 1.5 occurred in Donegal (NE of Milford on the Fanad Peninsula). Location 55.11N, 7.59W, see figure below.
There are reports of this event having been felt in the area around Milford. Events of this nature are not uncommon in this region. The largest event recorded in this area was a magnitude 2.2 which occurred near Clonmany on 21st November 1994.
An earthquake with magnitude ML 1.3 occurred on the 18th May 2017 at 23:04:12 UTC in the Irish Sea. The epicentral location of this event is 53.05N, 5.49 W, about 40km off the Wicklow coast, see map below.
The earthquake was detected by seismic stations of the Irish National Seismic Network (INSN) and the British Geological Survey (BGS), see seismograms below.
The epicentre is close to the location where a similar earthquake with magnitude ML 0.9 occurred on the 10th March 2017, see here for more information. Real-time information of automatic INSN event detections can be accessed on the INSN homepage at https://www.insn.ie/events.
On the 10th March 2017 at 05:06:25 UTC an earthquake of magnitude ML 0.9 occurred in the Irish Sea, approximately 50km off the coast of Wicklow, with the epicentral location 53.04N, 5.51W, see map below.
The event was recorded at Irish National Seismic Network (INSN) stations and at several British Geological Survey (BGS) stations in Wales and the Isle of Man, see seismograms below.
This earthquake was too weak to be felt by humans and occurred in a region of the Irish Sea for which several events have been detected in the past, see map on this INSN page.