A devastating tsunami could strike within 10 to 15 minutes of the initial shaking. The largest waves could reach heights of 100 feet , though coastal mountains and cliffs in areas like Oregon may provide a natural barrier to the water's eastward push. Preparation and Resilience Efforts
The Cascadia Subduction Zone (CSZ) is a unique tectonic fault where the is moving beneath the North American plate . Unlike other active zones, this fault is currently "locked" by friction, showing very little daily seismic activity, which allows massive amounts of stress to accumulate over time.
Scientists use the "seismic gap" theory to identify fault segments that haven't moved in a long time, marking them as the most likely locations for future massive ruptures. Immediate Hazards: Shaking and Inundation [S13E1] A Seismic Shift
Immediately following a major underwater quake, the water may pull away from the coast—a phenomenon known as drawback—before returning as a series of massive waves.
A major earthquake in this region would trigger a two-phase disaster involving both the land and the ocean. A devastating tsunami could strike within 10 to
Intense shaking along sandy shorelines can cause the ground to lose its strength and sink up to six feet, potentially dragging structures and trees down with it.
The content below summarizes the core scientific and safety insights related to the series, focusing on the heightened risks of a major earthquake in the Cascadia Subduction Zone and the necessary preparations for such an event. The Mechanics of the Cascadia Threat Unlike other active zones, this fault is currently
States are currently updating infrastructure and policies to mitigate the impact of such a "seismic shift".