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.