MONTH SEISMICITY REPORT FOR APRIL 2022
During the month of April 2022, the Alaska Earthquake Center reported 4329 earthquakes within the state. The largest earthquake was magnitude 5.7 that occurred on April 9 at 08:29:16 AKST (April 9, 16:29:16 UTC), 32 miles S of Amchitka. All twenty earthquakes with magnitude greater than 4.0 were recorded along subduction zone. We continued to monitor ongoing seismic activity within Anchorage, offshore Kodiak and Semionof-Chignik aftershock sequences as well as crustal seismic activity along the Brooks Range from Kaktovik in North-East to Seward Peninsula and Bering Strait in West. About one hundred icequakes were recorded in Prince William Sound, Icy and Yakutat bays. Ten earthquakes were reported as felt.
NOTABLE EVENTS IN DESCENDING ORDER OF MAGNITUDE
Magnitude 5.7, 32 miles S of Amchitka, April 9 08:29:16 AKST
Magnitude 5.4, 161 miles SE of Perryville, April 25 08:31:28 AKST
Magnitude 5.4, 54 miles SE of Yantarni Volcano, April 27 19:33:42 AKST
Magnitude 5.2, 16 miles NW of Nelson Lagoon, April 21 21:27:35 AKST
Magnitude 4.9, 113 miles S of Amchitka, April 12 01:15:13 AKST
Magnitude 4.6, 38 miles SE of Yantarni Volcano, April 10 14:29:29 AKST
Magnitude 4.6, 31 miles S of Amchitka, April 12 09:54:52 AKST
Magnitude 4.5, 47 miles SE of Sand Point, April 13 06:23:09 AKST
Magnitude 4.5, 77 miles S of Unalaska, April 22 23:21:49 AKST
Magnitude 4.5, 8 miles NW of Atka, April 27 20:14:57 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.