Monthly Seismicity Report For May 1, 2021 to May 31, 2021

During the month of May 2021, the Alaska Earthquake Center reported 4354 earthquakes within the state. The largest earthquake was magnitude 6.1 that occurred on May 30 at 22:59:55 AKST (May 31, 06:59:55 UTC), 55 miles N of Sutton. It was followed by numerous aftershocks. Also two earthquakes of magnitude 5.4 and 5.0 were recorded at Amchitka (Rat Islands), two events of M4.8 and M4.7 occured in SE of Alaska, and a M4.5 was located in Bering Sea, 154 miles W of Mathew Island. The seismic activity is ongoing in Simeonof, offshore Kodiak, Kaktovik, and Purcell Mountain areas. We keep recording icequakes in Prince William Sound, Yakutat Bay an Icy Bay. Eighteen earthquakes are reported as felt in May.

Notable Events in Descending Order of Magnitude

Magnitude 6.1, 55 miles N of Sutton, May 30 22:59:56 AKST
Magnitude 5.4, 38 miles SE of Amchitka, May 17 12:25:06 AKST
Magnitude 5.1, 30 miles SE of Buldir Is, May 12 14:00:31 AKST
Magnitude 5.0, 39 miles SE of Amchitka, May 17 21:39:58 AKST
Magnitude 5.0, 64 miles SE of Atka, May 22 01:04:38 AKST
Magnitude 4.8, 58 miles NW of Burwash Landing, May 8 18:03:45 AKST
Magnitude 4.7, 59 miles W of Elfin Cove, May 1 07:23:21 AKST
Magnitude 4.6, 56 miles N of Sutton, May 31 04:14:45 AKST
Magnitude 4.5, 154 miles W of St. Matthew Is, May 9 12:54:01 AKST
Magnitude 4.4, 28 miles S of Yunaska Island, May 4 08:47:42 AKST

This report was compiled by N.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.