Monthly Seismicity Report For March 1, 2021 to March 31, 2021

During the month of March 2021, the Alaska Earthquake Center reported 3824 earthquakes within the state. The largest earthquake was magnitude 4.5 that occurred on March 2 at 20:35:25 AKST (March 3, 05:35:25 UTC), 15 miles NE of Mt. Spurr. All events of magnitude greater than 4.0 were recorded along the subduction zone. The Simeonof aftershock activity is still ongoing, as well as Kodiak offshore and Kaktovik hot spots. Glaciers at Prince William Sound, Icy Bay and Yakutat bay produce more icequakes than in winter months. Ten earthquakes were reported as felt in March.

Notable Events in Descending Order of Magnitude

Magnitude 4.5, 15 miles NE of Mt. Spurr, March 2 21:35:26 AKST
Magnitude 4.5, 32 miles S of Atka, March 17 10:00:36 AKST
Magnitude 4.4, 59 miles S of Mt. Gareloi, March 2 16:21:51 AKST
Magnitude 4.3, 27 miles S of Sand Point, March 18 14:50:25 AKST
Magnitude 4.3, 5 miles SE of Mt. Cleveland, March 26 06:41:20 AKST
Magnitude 4.3, 5 miles SE of Mt. Cleveland, March 26 06:41:19 AKST
Magnitude 4.3, 36 miles E of Mt. Douglas, March 4 02:48:12 AKST
Magnitude 4.2, 16 miles SW of Iliamna Volcano, March 22 09:41:47 AKST
Magnitude 4.2, 26 miles S of Amukta Pass, March 10 15:37:46 AKST
Magnitude 4.1, 25 miles S of Mt. Sergief, March 2 22:51:58 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 authroized or unauthorized use.

For more information on earthquakes and seismology, contact the AEC at (907)-474-7320.