WEEK SEISMICITY REPORT FOR JULY 24, 2023 TO JULY 30, 2023
During the week of July 24, 2023, the Alaska Earthquake Center reported 1024 earthquakes within the state. The largest earthquake was magnitude 5.0 that occurred on July 28 at 11:11:22 AKDT (July 28, 19:11:22 UTC), 19 miles NW of Mt. Douglas.
Other significant events include a magnitude 4.0 earthquake that occurred 16 miles S of Pump Station #3 on July 29, 2023 11:32:49 AKDT, this event had 24 aftershocks ranging in magnitude from 1.0 to 2.5. Also, a magnitude 3.7 earthquake that occurred 54 miles NE of Dawson City on July 27, 2023 12:51:29 AKDT.
There were three aftershocks of the July 15, 2023 magnitude 7.2 Sand Point earthquake with a magnitude above 3.5 this week. A magnitude 4.7 earthquake that occurred 53 miles SW of Sand Point on July 26, 2023 07:29:18 AKDT, a magnitude 4.5 earthquake that occurred 40 miles S of Sand Point on July 24, 2023 04:04:19 AKDT, and a magnitude 3.9 earthquake that occurred 67 miles S of Sand Point on July 28, 2023 06:27:16 AKDT.
There were 34 icequakes recorded at Mt. Spurr, Black Rapids Glacier, Prince William Sound, Miles Glacier, Icy Bay, Yakutat Bay, and in the Wrangell Mountains.
Four events were reported as felt.
NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE
Magnitude 5.0, 19 miles NW of Mt. Douglas, July 28 11:11:22 AKDT
Magnitude 4.7, 53 miles SW of Sand Point, July 26 07:29:19 AKDT
Magnitude 4.6, 72 miles SW of Akhiok, July 28 03:32:26 AKDT
Magnitude 4.5, 40 miles S of Sand Point, July 24 04:04:20 AKDT
Magnitude 4.5, 57 miles S of Unalaska, July 30 00:02:57 AKDT
Magnitude 4.3, 26 miles S of Makushin Volcano, July 29 00:06:54 AKDT
Magnitude 4.0, 16 miles SE of Pump Station #3, July 29 11:32:50 AKDT
Magnitude 4.0, 18 miles W of Amchitka, July 28 19:12:01 AKDT
Magnitude 3.9, 67 miles S of Sand Point, July 28 06:27:16 AKDT
Magnitude 3.7, 54 miles NE of Dawson City, July 27 12:51:30 AKDT
This report was compiled by R. Wilkes
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.