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2018-11-30, M7.0, Southern Alaska

An earthquake of magnitude 7.0 occurred in Southern Alaska, on the 30th November 2018 at 8:29 a.m. local time (17:29:28 UTC). The quake was centred about 11km north of Anchorage, the largest city in the state, according to the US Geological Survey (USGS). A series of aftershocks was recorded following the initial shock, which had a depth of 40.9km, the USGS said. Around 300,000 people live in Anchorage with 100,000 in the surrounding area. A tsunami warning issued for the Cook Inlet and southern Kenai Peninsula regions was later cancelled.

This earthquake occurred in the Alaska-Aleutian subduction zone, on a fault within the subducting Pacific slab.

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).