RELATED: Largest earthquake in 35 years hits Southwest Alaska “In 2023, we had a magnitude 7.2 in the Shumagin Islands, and then in 2021, we had that magnitude 8.2 off the coast of Chignik," she ...

By American Geophysical Union – Scientists have uncovered the source of a mysterious 2021 ... 8.2 quake that hit just 15 kilometers below the surface. That unusual, “hidden” earthquake ...