Weekly Seismicity Report For April 26, 2021 to May 2, 2021

During the week of April 26, 2021, the Alaska Earthquake Center reported 944 earthquakes within the state. The largest earthquake was magnitude 4.8 that occurred on April 27 at 09:54:36 AKST (April 27, 17:54:36 UTC), 9 miles NW of Elmendorf AFB. This event was an aftershock of the 2018 M7.1 Anchorage earthquake. Other notable events were a M4.4 earthquake 25 miles South of Tanana on April 30, 2021 and a M4.7 earthquake 59 miles West of Elfin Cove in Southeast Alaska. Activity is ongoing in the offshore Kodiak, Kaktovik and Simeonoff aftershock areas. There has been continued glacial activity as well. Six earthquakes were reported as felt. 

Notable Events in Descending Order of Magnitude

Magnitude 4.8, 9 miles NW of Elmendorf AFB, April 27 09:54:36 AKST
Magnitude 4.7, 59 miles W of Elfin Cove, May 1 07:23:21 AKST
Magnitude 4.4, 25 miles S of Tanana, April 30 09:19:24 AKST
Magnitude 4.1, 25 miles NE of Chenega Bay, April 27 09:26:01 AKST
Magnitude 3.7, 65 miles SE of Sand Point, April 27 04:45:12 AKST
Magnitude 3.7, 2 miles E of Great Sitkin Island, April 30 07:15:36 AKST
Magnitude 3.7, 16 miles E of Ukinrek Craters, April 26 18:32:13 AKST
Magnitude 3.5, 30 miles SE of Amchitka, April 27 02:16:37 AKST
Magnitude 3.5, 59 miles W of Elfin Cove, May 1 05:53:02 AKST
Magnitude 3.4, 24 miles S of Atka, May 1 23:59:55 AKST

This report was compiled by R. Ranft

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 damage resulting from its authorized or unauthorized use.

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