During the month of February 2024, the Alaska Earthquake Center reported 3126 earthquakes within the state with magnitude ranging from 0.52 to 5.5 and depth from 0 km to 247 km. The largest earthquake was magnitude 5.5 that occurred on February 28 at 06:50:21 AKDT (February 28, 15:50:21 UTC), 5 miles S of Semisopochnoi Island. Totally, 14 earthquakes of M 4.0-5.5 have been recorded in February, all of them occurred along the subduction zone.

We also reported seismic sources other than regional tectonic earthquakes. Of these, 40 were suspected quarry blasts (M0.7-1.9) in the vicinity of either Fort Knox or Usibelli mines and 56 ice quakes (M1.0-1.9) primarily located in the Prince William Sound, Yakutat Bay and Brady Glacier. Seismic activity remained recorded at the volcanoes of  Katmai group with a total of 34 events (M0.8-2.9).

12 events were reported as felt. 


Magnitude 5.5, 5 miles S of Semisopochnoi Island, February 28 06:50:21 AKST
Magnitude 5.0, 63 miles S of Bobrof Island, February 29 00:22:20 AKST
Magnitude 4.8, 38 miles S of Yunaska Island, February 11 15:40:15 AKST
Magnitude 4.7, 37 miles S of Kantishna, February 14 12:43:37 AKST
Magnitude 4.6, 14 miles SW of Redoubt Volcano, February 21 01:47:30 AKST
Magnitude 4.4, 13 miles NW of Carlisle Island, February 10 05:35:23 AKST
Magnitude 4.4, 5 miles NE of Koniuji Island, February 23 06:45:38 AKST
Magnitude 4.4, 40 miles NE of Talkeetna, February 23 09:43:56 AKST
Magnitude 4.3, 76 miles SE of Okmok Caldera, February 18 22:04:02 AKST
Magnitude 4.2, 28 miles S of Atka Pass, February 16 20:46:40 AKST

This report was compiled by N. Kozyreva.

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.