Major 2020 Alaska quake triggered neighboring 2021 temblor
Map shows location of the Shumagin Gap, location of the 2020 Simeonof and 2021 Chignik earthquakes. Credit: Alaska Earthquake Center
A study of two powerful earthquakes in adjacent areas off the Alaska Peninsula in 2020 and 2021 shows a connection between the two. It also suggests they may be a part of an 80-year rupture cascade along the fault.…