WEEK SEISMICITY REPORT FOR AUGUST 21, 2023 TO AUGUST 27, 2023
During the week of August 21, 2023, the Alaska Earthquake Center reported 954 earthquakes within the state. The largest earthquake was magnitude 4.0 that occurred on August 21 at 06:45:05 AKDT (August 21, 14:45:05 UTC), 19 miles SE of Semisopochnoi Island.
Other notable events include a magnitude 3.6 earthquake that occurred 92 miles SW of Point Hope on August 26, 2023 06:01:16 AKDT. In addition to this event, we recorded relatively high activity in this area with other 6 earthquakes ranging in magnitude between 2.5 and 3.4 in this week.
Also, there was an increase in activity E of Atka, on the Amlia island with approximately 40 events ranging in magnitude from 1.6 to 3.3.
There were 39 icequakes recorded near Mt. Spurr, the Prince William Sound region, Icy Bay and Yakutat Bay.
3 events were reported as felt.
NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE
Magnitude 4.0, 19 miles SE of Semisopochnoi Island, August 21 06:45:05 AKDT
Magnitude 3.9, 17 miles E of Amukta Pass, August 24 00:33:33 AKDT
Magnitude 3.9, 63 miles S of Nikolski, August 26 11:46:43 AKDT
Magnitude 3.8, 40 miles SE of Semisopochnoi Island, August 22 06:31:09 AKDT
Magnitude 3.8, 24 miles SE of Kagamil Island, August 25 06:26:26 AKDT
Magnitude 3.7, 19 miles W of Iliamna Volcano, August 23 10:51:52 AKDT
Magnitude 3.7, 60 miles S of Nikolski, August 26 17:31:52 AKDT
Magnitude 3.7, 51 miles SW of Sand Point, August 27 13:56:07 AKDT
Magnitude 3.7, 29 miles SW of Willow, August 27 03:27:00 AKDT
Magnitude 3.6, 92 miles SW of Point Hope, August 26 06:01:17 AKDT
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.