2022 Alaska Seismicity Summary

Abstract

The Alaska Earthquake Center reported 47,045 seismic events in Alaska and neighboring regions in 2022. The largest earthquake was a magnitude 6.8 event that occurred on January 11 in the Fox Islands region of the Aleutian Islands. Other active spots include two M6.3 earthquakes in the Rat Islands on June 4 and December 14, both of which were followed by moderate aftershock sequences. A magnitude 5.4 earthquake was recorded in an unusual location in the Bering Sea, east of St. George Island, on July 4. The two largest earthquakes in mainland Alaska, both magnitude 5.2, occurred in the Yakutat Bay region on January 8 and in central Alaska on February 6. We continued to monitor ongoing activity within the 2018 M7.1 Anchorage, 2018 M6.4 Kaktovik, 2018 M7.9 Offshore Kodiak, 2020 M7.6 Simeonof, and 2021 M8.2 Chignik aftershock sequences, the Purcell Mountains earthquake swarm, and the Wright Glacier cluster northeast of Juneau. All aftershock sequences continued to slow down compared to the previous years.