WEEKLY SEISMICITY REPORT FOR AUGUST 19, 2024 TO AUGUST 25, 2024

During the week of August 19, 2024, the Alaska Earthquake Center reported a total of 668 earthquakes across the state. The largest event was a magnitude 4.4 earthquake that occurred on August 22 at 01:52:55 AKDT (August 22, 09:52:55 UTC), located 134 miles south of Atka. It was not reported as felt.

On August 21 at 18:40:21 AKDT, a magnitude 3.7 earthquake was felt in Valdez and Anchorage, with 35 reports of shaking.

The previously active swarm of earthquakes just east of Atka Island has mostly subsided, with only 5 earthquakes recorded this week. Seismic activity south of Unalaska has also dropped significantly.

Seventeen icequakes were detected across southern Alaska this week. Additionally, 5 mining blasts were observed at the Fort Knox mine complex, north of Fairbanks.

In total, two events were reported as felt.

 

NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE


Magnitude 4.4, 134 miles S of Atka, August 22 01:52:56 AKDT
Magnitude 3.8, 26 miles NE of Atka, August 23 13:08:40 AKDT
Magnitude 3.8, 21 miles W of Amchitka, August 24 22:42:57 AKDT
Magnitude 3.7, 25 miles W of Valdez, August 21 18:40:21 AKDT
Magnitude 3.6, 152 miles S of Mt. Gareloi, August 19 05:46:42 AKDT
Magnitude 3.4, 141 miles S of Atka, August 22 00:55:17 AKDT
Magnitude 3.4, 65 miles S of Sand Point, August 25 12:48:57 AKDT
Magnitude 3.4, 23 miles N of Augustine Volcano, August 19 20:35:25 AKDT
Magnitude 3.3, 24 miles W of Nikiski, August 25 15:17:47 AKDT
Magnitude 3.3, 132 miles SE of Perryville, August 21 22:20:48 AKDT

This report was compiled by Anthony Erickson

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.