During the week of November 21, 2022, the Alaska Earthquake Center reported 954 earthquakes within the state. The largest earthquake was magnitude 5.5 that occurred on November 21 at 06:09:28 AKST (November 21, 15:09:28 UTC), 57 miles SE of Nikolski in the Fox Island region of Aleutian Islands.

Other notable events include two earthquakes that occurred northwest of Wasilla: A M4.0 on November 21 at 23:50:07 AKST and a M4.3 on November 22 at 16:36:42 AKST. Both events were felt widely in Anchorage, Wasilla and surrounding areas. We also located a M2.7 earthquake on November 27 at 10:56:33 AKST 6 miles SE of Ester, which was felt widely in Fairbanks, North Pole and Fort Wainwright.

We are still observing an increase in activity in the Purcell Mountains swarm with 41 events reported for this week with magnitudes mostly ranging between 1.0 - 2.0, with the largest earthquake of M2.5 recorded on November 25. There was also increase in activity north of the White Mountain in the Seward Peninsula region with 12 events reported during this week, with magnitudes ranging between 1.0-2.6. Observed activity under the Tanaga volcano in central Aleutians decreased this week with 12 shallow events, ranging in magnitude between 1.7-3.1.

There were 42 icequakes recorded in the southern and southeast Alaska including Prince William Sound, Icy Bay, and Yakutat Bay.  8 events were reported as felt with magnitudes ranging between M2.2 to M4.8. 


Magnitude 5.5, 57 miles SE of Nikolski, November 21 06:09:29 AKST
Magnitude 4.8, 38 miles S of Atka Pass, November 27 10:55:00 AKST
Magnitude 4.6, 55 miles SE of Nikolski, November 21 18:27:31 AKST
Magnitude 4.3, 10 miles W of Hatcher Pass, November 22 16:36:43 AKST
Magnitude 4.3, 48 miles SW of Mt. Gareloi, November 24 22:58:47 AKST
Magnitude 4.0, 10 miles W of Hatcher Pass, November 21 23:50:07 AKST
Magnitude 3.8, 15 miles S of Atka, November 25 03:17:05 AKST
Magnitude 3.8, 30 miles N of Mt. Vsevidof, November 26 12:15:46 AKST
Magnitude 3.7, 31 miles NW of Valdez, November 24 11:11:52 AKST
Magnitude 3.7, 119 miles SE of Kodiak, November 26 03:11:26 AKST

This report was compiled by Ayumi Bakken

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 authorized or unauthorized use.

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