WEEK SEISMICITY REPORT FOR JULY 31, 2023 TO AUGUST 6, 2023
During the week of July 31, 2023, the Alaska Earthquake Center reported 915 earthquakes within the state. The largest earthquake was magnitude 5.6 that occurred on August 3 at 11:33:50 AKDT (August 3, 19:33:50 UTC), 53 miles SW of Sand Point.
Including this magnitude 5.6 event, there were approximately 30 aftershocks of the July 15, 2023 magnitude 7.2 Sand Point earthquake during this week.
Other notable events include, a magnitude 4.7 earthquake that occurred 22 miles N of Augustine Volcano on August 5, 2023 16:17:51 AKDT, which was reported as felt in Anchorage and Kenai Peninsula, and a magnitude 4.8 earthquake that occurred 36 miles NW of Burwash Landing on August 6, 2023 12:22:03 AKDT.
There were 49 icequakes recorded at Mt. Spurr, Prince William Sound, Icy Bay and Yakutat Bay.
Four events were reported as felt.
NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE
Magnitude 5.6, 53 miles SW of Sand Point, August 3 11:33:51 AKDT
Magnitude 4.8, 36 miles NW of Burwash Landing, August 6 12:22:04 AKDT
Magnitude 4.7, 22 miles N of Augustine Volcano, August 5 16:17:51 AKDT
Magnitude 4.5, 87 miles S of Westdahl Peak, August 1 11:40:24 AKDT
Magnitude 4.5, 74 miles S of Seguam Island, August 6 14:04:57 AKDT
Magnitude 4.2, 142 miles SE of Kodiak, August 3 21:50:25 AKDT
Magnitude 3.9, 40 miles W of Akhiok, August 4 06:44:25 AKDT
Magnitude 3.9, 21 miles NW of Semisopochnoi Island, July 31 06:56:37 AKDT
Magnitude 3.9, 21 miles S of Iliamna Volcano, August 3 13:56:49 AKDT
Magnitude 3.8, 19 miles S of Davidof Island, August 4 06:26:54 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.