The magnitude 8.2 Mw Chignik earthquake, southeast of Perryville, Alaska (south of the Alaska Peninsula) (55.325 N 157.841 W depth=32 km) occurred at 06:15 UTC and generated a small tsunami. This was the largest U.S. earthquake in almost 60 years, since the 04 February 1965 magnitude 8.7 Mw Rat Islands, Alaska, earthquake. The Chignik earthquake was very close (about 62 km) to the 22 July 2020 magnitude 7.8 Mw earthquake, and about 145 km from the 19 October 2020 magnitude 7.6 Mw earthquake. The tsunami was observed at Alaskan tide gauges, as well as some Hawaiian and U.S. West Coast tide gauge stations.
