Jan. 26, 2025, marks 325 years since the last great earthquake on the Cascadia subduction zone. It’s a time to reflect on what we’ve learned about this largest fault system in the lower 48 states ...

Last summer, the Japanese weather agency issued a stark megathrust earthquake alert ... Tokyo and killed at least 20,000 people. The 9.1 magnitude Tohoku earthquake spiraled into a fierce tsunami ...