At 20:54:40 (UTC) on the 19th of October 2020, a magnitude 7.5 earthquake occurred near the Alaska Peninsula (see map below). The earthquake struck approximately 90 km south of the peninsula at a depth of 40 km. Initially a tsunami threat warning was issued by the Pacific Tsunami Warning Center, however it is now thought this threat has passed. The Alaska Peninsula is prone to large earthquakes due to the subduction of the Pacific plate beneath the North American plate in that region.
The earthquake was recorded at seismic stations worldwide, including stations of the Irish Nation Seismic Network (INSN), see seismic waveforms below.
Further information is available from the following sources: