Cascadia Megaquake: How The ‘Big One’ Could Wipe Out the Pacific Northwest

The Cascadia Megaquake isn’t just a possibility—it’s an inevitable disaster!

This seismic beast, expected to hit the Pacific Northwest, threatens to rival the most destructive earthquakes in U.S. history. The Cascadia Subduction Zone, a 700-mile fault line off North America’s west coast, has been building tension for centuries, and experts predict a magnitude 9.0 earthquake.

The 1700 quake left a trail of destruction, submerging towns and creating tsunamis that reached as far as Japan. Now, the stakes are even higher, with over 13 million lives and trillions of dollars in infrastructure at risk.

We break down the science, examine potential impacts, and gauge our preparedness for the Big One. California, perched on the western edge of North America, is a hotbed of seismic activity thanks to its spot along the boundary of the Pacific and North American plates.

Just north of California, there’s the Cascadia Subduction Zone—a geological powerhouse stretching from northern California all the way to British Columbia.

Here, the Juan de Fuca Plate is sliding under the North American Plate, stirring up earthquakes and volcanic action. This 700-mile-long fault line has long been a ticking seismic time bomb.

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