Monthly Seismicity Report For December 1, 2020 to December 31, 2020

During the month of December 2020, the Alaska Earthquake Center reported 3790 earthquakes within the state. The largest earthquake was magnitude 6.4 that occurred on December 1 at 07:22:40 AKST (December 1, 16:22:40 UTC), 37 miles SE of Nikolski, in Fox Islands. All earthquakes greater than magnitude 4.0 were located along Aleutian Islands except a M4.5 that occurred in Canada. About 750 recorded events were aftershocks of the M7.8 Simeonof Earthquake including five events of M4.5-5.1. There were about 50 aftershocks of M1.0-3.8 in Kaktovik as well as about a dozen events in Bering Strait. Eighteen earthquakes were reported as felt in December.

Notable Events in Descending Order of Magnitude

Magnitude 6.4, 37 miles SE of Mt. Recheshnoi, December 1 07:22:41 AKST
Magnitude 5.7, 273 miles SE of Akhiok, December 1 07:35:50 AKST
Magnitude 5.3, 112 miles W of Attu, December 8 21:47:08 AKST
Magnitude 5.1, 129 miles S of Sand Point, December 15 20:49:26 AKST
Magnitude 4.9, 60 miles SE of Sand Point, December 18 15:10:43 AKST
Magnitude 4.7, 75 miles SE of Sand Point, December 2 16:08:45 AKST
Magnitude 4.7, 69 miles SE of Sand Point, December 9 16:37:27 AKST
Magnitude 4.7, 299 miles SE of Akhiok, December 23 06:47:52 AKST
Magnitude 4.5, 63 miles SE of Sand Point, December 29 18:22:18 AKST
Magnitude 4.5, 134 miles SE of Old Crow, December 21 03:16:20 AKST

This report was compiled by kozyreva

The data in this report are preliminary and subject to revision. The earthquake parameters have been determined by the AEC, with supplemental data provided by the USGS National Earthquake Information Center. The data are released on the condition that none of the cooperating agencies may be held liable for any damaged resulting from its authroized or unauthorized use.

For more information on earthquakes and seismology, contact the AEC at (907)-474-7320.