Nov 9, 2026
Cascadia's last great earthquake struck on a winter night in 1700 and was dated with tree rings and Japanese tsunami records. Here is what the USGS and Oregon officials say about the next one.
Nov 9, 2026
A tsunami starts when a large volume of ocean water is suddenly pushed out of place. Earthquakes do that most often, but only certain kinds, and landslides and volcanoes can too.
Nov 8, 2026
The United States has four tsunami alert levels and two warning centers. Each level comes with a different action from the National Weather Service.
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