A swarm of hundreds of small earthquakes has been occurring in the volcano area that started on 11 April at about 02:00 local time and is still continuing at the time of this update. The most of quakes are too small to locate.
The largest earthquakes, registered by the National Earthquake Information Center and the Alaska Earthquake Center, were recorded with a maximum magnitude of a 2.8 at 10 km depth on 11 April at 11:00 local time and with magnitude M 2.1 at 4 km depth at 15:44 local time on the same day.
The cause of quakes is currently unknown for now and may be of volcanic, tectonic or volcano-tectonic origin. The closest AVO seismic station is located at Sitka, 24 km to the east of the volcano.
The latest earthquake swarm occurred beneath the volcano in 2020, but less frequent than this week.
Source: Alaska Volcano Observatory volcano activity update 14 April 2022