Monthly Seismicity Report For November 1, 2021 to November 30, 2021

During the month of November 2021, the Alaska Earthquake Center reported 3581 earthquakes within the state. The largest earthquake was magnitude 5.2 that occurred on November 4th at 00:57:07 AKST (November 4, 08:57:07 UTC), 44 miles SE of Nikolski, in Fox Islands. Seven events of magnitude greater than 4.0 were recorded along the subduction zone from Cook Inlet in the East to Rat Islands in the West. Three earthquakes occurred in mainland Alaska: a M4.3 45 miles NW of Fort Yukon, a M4.1 at Kantishna in Denali National Park, and a M4.1 at Salcha followed by aftershocks. The seismic activity was ongoing in the Brooks Range, Seward Peninsula, and offshore Kodiak.  Aftershocks continued to be recorded in Simeonof and Chignik zones. The number of icequakes becoming smaller although there are still records of them in Prince William Sound, Icy Bay and Yakutat Bay. Seven events were reported as felt.

Notable Events in Descending Order of Magnitude

Magnitude 5.2, 43 miles SE of Mt. Recheshnoi, November 3 23:57:07 AKST
Magnitude 5.2, 41 miles SE of Mt. Gareloi, November 18 00:50:36 AKST
Magnitude 4.5, 94 miles SW of Akhiok, November 15 00:19:14 AKST
Magnitude 4.3, 23 miles W of Mt. Martin, November 22 02:27:10 AKST
Magnitude 4.3, 5 miles SW of Venetie, November 27 16:44:11 AKST
Magnitude 4.2, 28 miles S of Amchitka, November 10 21:34:51 AKST
Magnitude 4.1, 57 miles SE of Sand Point, November 17 18:20:49 AKST
Magnitude 4.1, 16 miles SW of Salcha, November 5 13:12:51 AKST
Magnitude 4.1, 39 miles SW of Kantishna, November 21 20:27:58 AKST
Magnitude 4.0, 22 miles NE of Augustine Volcano, November 11 09:58:51 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 damage resulting from its authorized or unauthorized use.

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