WEEKLY SEISMICITY REPORT FOR MARCH 24, 2025 TO MARCH 30, 2025
During the week of March 24, 2025, the Alaska Earthquake Center reported 670 earthquakes within the state. The largest was a magnitude 4.9 earthquake that occurred on March 28 at 08:08:51 AKDT (March 28, 16:08:51 UTC), 14 miles south of Atka. This event was not reported as felt.
Swarm activity south of Adak continued this week, with 60 recorded events. Notably, a small swarm of 22 earthquakes appeared southwest of Unalaska. Meanwhile, the increased activity southwest of Kantishna has subsided, with only 9 recorded events.
Overall, five earthquakes were reported as felt this week. The most widely felt event, with 402 reports, was a Magnitude 3.2 that occurred on March 30, 2025 13:05:03 AKDT (March 30, 2025 21:05:03 UTC), 8 miles northeast of Fairbanks.
Additionally, four ice quakes and two mining blasts were recorded.
NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE
Magnitude 4.9, 14 miles S of Atka, March 28 08:08:51 AKDT
Magnitude 4.1, 22 miles E of Kantishna, March 29 18:01:58 AKDT
Magnitude 4.0, 59 miles NW of Skwentna, March 25 12:31:36 AKDT
Magnitude 4.0, 56 miles SE of Adak, March 26 15:17:58 AKDT
Magnitude 3.7, 52 miles SE of Adak, March 24 07:23:16 AKDT
Magnitude 3.7, 42 miles SE of Mt. Gareloi, March 27 08:33:15 AKDT
Magnitude 3.7, 58 miles S of Adak, March 25 10:00:37 AKDT
Magnitude 3.6, 2 miles SE of Amchitka, March 24 23:38:27 AKDT
Magnitude 3.6, 36 miles N of Valdez, March 25 10:40:55 AKDT
Magnitude 3.6, 44 miles S of Tanaga Volcano, March 28 09:49:56 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.