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2020-09-17, M1.3, Offshore Skerries, North Dublin

On the 17th of September 2020 at 17:31:40 GMT, a magnitude M1.3 earthquake occurred in the Irish Sea approximately 2 km offshore Skerries, North Dublin. The earthquake occurred at a depth of 14 km. The epicentre location is indicated with a red circle in the map below, black lines denote major fault zones in and around Ireland. Earthquakes do occur regularly in the Irish Sea, however, it is not often that earthquakes are detected so close to Ireland’s east coast. The last detected earthquake to occur within 10 km of the east coast was the M2.4 event from the 18th of March 2013, occurring 6 km offshore Wexford.

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

2020-05-14, M0.6, Irish Sea

On the 14th of May 2020 at 03:52:54 UTC, an earthquake of magnitude M0.6 occurred in the Irish Sea. The earthquake located approximately 20km east of the Isle of Man, and occurred at a depth of 3km. The epicentre location is indicated with a red circle in the map below, black lines denote major fault zones in and around Ireland. Events of this nature are not uncommon in the Irish Sea, with several small events (M < 1.1) detected near the Isle of Man in the past 5 years.

The event was recorded by the Irish National Seismic Network (INSN) and British Geological Survey (BGS) seismometers, for seismograms see the plot below (click image to enlarge).

 

2020-03-22, M5.4, Zagreb, Croatia

At 05:24:02 (UTC) on the 22nd of March 2020, a M5.4 earthquake struck 7km northeast of Zagreb, Croatia. The earthquake occurred at a depth of 10km and caused several injuries as well as widespread damage to buildings in Zagreb. This event is the largest to occur near Zagreb in the past 140 years.

The earthquake was recorded at seismic stations worldwide, including stations of the Irish National Seismic Network (INSN), see seismic waveforms below (select figure to enlarge).

Further information is available through the links below:

https://www.emsc-csem.org/Earthquake/earthquake.php?id=840695

https://earthquake.usgs.gov/earthquakes/eventpage/us70008dx7/executive

2019-12-20, M1.4, Irish Sea

On the 20th of December 2019 at 09:53:44 local time, a M1.4 earthquake occurred in the Irish Sea approximately 90km north-east of Dublin and 40km south of the Isle of Man. The epicentre location is shown in the map below. This event follows a M2.5 earthquake in the Irish Sea from the 15th of December 2019. The M1.4 earthquake is most likely an aftershock of the recent M2.5 earthquake.

The event was recorded by the Irish National Seismic Network (INSN) and British Geological Survey (BGS) seismometers, and can be seen in the waveforms plotted below:

2019-12-18, M1.6, Offshore Antrim

On the 18th of December 2019 at 20:22:14 UTC, a M1.6 earthquake occurred offshore Co. Antrim, Northern Ireland. The earthquake located approximately 10km east of both Ballycastle and Rathlin Island, and at a depth of 1km. Since 2010, the Irish National Seismic Network (INSN) has previously recorded 5 earthquakes off the Antrim Coast, the largest of which was an M1.6 earthquake occurring on the 26th of October 2013.

The event was recorded by the Irish National Seismic Network (INSN) and British Geological Survey (BGS) seismometers, and can be seen in the waveforms plotted below:

The INSN is operated by the Dublin Institute for Advanced Studies (DIAS) in co-operation with the Geological Survey Ireland (GSI).

2019-12-15, M2.5, Irish Sea

On the 15th of December 2019 at 21:19:52 local time, a M2.5 earthquake occurred in the Irish Sea approximately 90km north-east of Dublin and 40km south of the Isle of Man. The epicentre location is shown in the map below. Events of this nature are not uncommon in the Irish Sea, a similar smaller event occurred on the 17th of November 2019. There has also been a subsequent M1.7 event at 06:23:55 on the 16th December off the English coast North of Blackpool (see map at bottom of page).

Location of M2.5 event on the 15th December 2019.

There have been no reports that the earthquake was felt onshore but the event was recorded by the Irish National Seismic Network (INSN) seismometers, and can be seen in the waveforms plotted below.

The INSN is operated by the Dublin Institute for Advanced Studies (DIAS) in co-operation with the Geological Survey Ireland (GSI).

 

Location of M1.7 Irish Sea event on the 16th December 2019.

2019-06-18, M1.9, Irish Sea

On the 18th of June 2019 at 20:53:12 local time (19:53:12 UTC) a M1.9 earthquake occurred in the Irish Sea approximately 15km west off Holyhead in Wales. The epicentre location is shown in the map below. The earthquake was detected 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). The INSN did not receive any felt reports for this event.

The earthquake was detected by seismic stations of the Irish National Seismic Network (INSN) and the British Geological Survey (BGS), see seismograms below.

Past Seismograms
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Live Seismograms
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DSB - Dublin
VAL - Kerry