WEEK SEISMICITY REPORT FOR JANUARY 16, 2023 TO JANUARY 22, 2023

During the week of January 16, 2023, the Alaska Earthquake Center reported 853 earthquakes within the state. The largest earthquake was magnitude 4.8 that occurred on January 21 at 18:27:43 AKST (January 22, 03:27:43 UTC), 28 miles NE of Uliaga Island.

The largest widely felt event was a M4.5 9 miles SW of Hatcher Pass on January 16 2023 at 08:43:27 AKST (January 16, 2023 17:43:27 UTC), and this event was reported as felt in Anchorage, Wasilla and surrounding areas. There were about 30 aftershocks from this earthquake that occurred through January 17th. 

Other noteworthy event was a M4.8 91 miles SE of Westdahl Peak, and there were also nearly 30 aftershock from this earthquake.

Four events including above were reported as felt with magnitude ranging M2.6 to M4.8. Four icequakes were reported in the Prince William Sound.

NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE


Magnitude 4.8, 28 miles NE of Uliaga Island, January 21 18:27:43 AKST
Magnitude 4.8, 91 miles SE of Westdahl Peak, January 19 02:45:12 AKST
Magnitude 4.5, 9 miles SW of Hatcher Pass, January 16 08:43:28 AKST
Magnitude 4.2, 47 miles W of Elfin Cove, January 16 19:48:14 AKST
Magnitude 3.9, 91 miles SE of Westdahl Peak, January 18 23:36:26 AKST
Magnitude 3.8, 86 miles SE of Westdahl Peak, January 18 21:43:47 AKST
Magnitude 3.8, 88 miles SE of Westdahl Peak, January 20 19:07:10 AKST
Magnitude 3.8, 22 miles SW of Amchitka, January 17 04:13:58 AKST
Magnitude 3.7, 38 miles S of Herbert Island, January 15 17:05:12 AKST
Magnitude 3.7, 31 miles NE of Atka, January 16 02:10:29 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.