WEEK SEISMICITY REPORT FOR APRIL 17, 2023 TO APRIL 23, 2023

During the week of April 17, 2023, the Alaska Earthquake Center reported 854 earthquakes within the state. The largest earthquake was magnitude 4.7 that occurred on April 21 at 10:17:12 AKDT (April 21, 18:17:12 UTC), 6 miles W of Kasatochi Island.

Other notable event was a M4.6 16 miles 95 miles S of Mt. Sergief on April 22, 2023 04:54:53 AKDT.

There were 29 icequakes recorded in Mt. Wrangell, Prince William Sound, icy Bay and Yakutat region.

Two events were reported as felt.

 

NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE


Magnitude 4.7, 6 miles W of Kasatochi Island, April 21 10:17:12 AKDT
Magnitude 4.6, 95 miles S of Mt. Sergief, April 22 04:54:54 AKDT
Magnitude 3.9, 80 miles SE of Chignik, April 22 13:23:57 AKDT
Magnitude 3.8, 26 miles S of Atka Pass, April 19 16:02:34 AKDT
Magnitude 3.7, 128 miles SE of Perryville, April 22 21:10:28 AKDT
Magnitude 3.7, 122 miles SE of Perryville, April 22 06:42:44 AKDT
Magnitude 3.5, 30 miles S of Atka Pass, April 16 21:54:34 AKDT
Magnitude 3.4, 43 miles S of Perryville, April 17 23:58:24 AKDT
Magnitude 3.3, 56 miles SW of Kiska Volcano, April 21 07:26:28 AKDT
Magnitude 3.3, 28 miles N of Valdez, April 19 19:48:13 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.