2021 M8.2 Chignik Earthquake

The M8.2 Chignik Earthquake has spurred an active aftershock sequence. As of 5 days following the mainshock we've recorded approximately more than 240 aftershocks. The largest aftershock was a M6.1 which occurred four minutes after the mainshock.

The map below shows 5 days of aftershocks (red) plotted against rupture patches from historic events in the region.

This is an ongoing sequence and will be updated as it evolves.

Last Modified: April 24, 2024