WEEK SEISMICITY REPORT FOR OCTOBER 17, 2022 TO OCTOBER 23, 2022

During the week of October 17, 2022, the Alaska Earthquake Center reported 992 earthquakes within the state. The largest earthquake was magnitude 4.7 that occurred on October 20 at 14:50:51 AKST (October 20, 22:50:51 UTC), 47 miles SE of Mt. Sergief in the Andreanof Islands region of the Aleutian Islands.

There were six events greater than M3.5 that occurred outside the subduction zone, four of which were felt in their surrounding regions.  The largest of these events was a M4.4 10 miles S of Skwentna on October 21st at 21:02:35 AKDT (October 10, 2022 16:00:56 UTC).  It was reported as felt in Wasilla. 

Detected icequakes decreased this week with 41 icequakes located in southcentral and southeast Alaska.

Nine events ranging from M2.5 to M4.4 were reported as felt.

NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE


Magnitude 4.7, 47 miles SE of Mt. Sergief, October 20 14:50:51 AKDT
Magnitude 4.4, 10 miles S of Skwentna, October 21 21:02:35 AKDT
Magnitude 4.4, 74 miles SE of Chignik, October 23 05:23:51 ADST
Magnitude 4.3, 20 miles S of Iliamna Volcano, October 16 22:20:38 ADST
Magnitude 4.2, 26 miles SE of Mt. Gareloi, October 21 05:48:07 ADST
Magnitude 3.9, 154 miles S of Yunaska Island, October 21 13:21:43 AKDT
Magnitude 3.8, 101 miles SE of Unalaska, October 18 05:42:00 AKDT
Magnitude 3.8, 67 miles SW of Buldir Is, October 18 09:33:20 AKDT
Magnitude 3.8, 56 miles SW of Prince Rupert, October 20 21:40:47 AKDT
Magnitude 3.7, 20 miles W of Hope, October 20 09:21:40 AKDT

This report was compiled by K. Becker

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.