Cascadia: The West Coast Fault Line That Is "Nine Months Pregnant"

The fault zone that produced the largest known earthquake in the Lower 48 is "nine months pregnant and overdue." This time line illustrates it.

Ever since the massive 9.0 magnitude earthquake struck Japan, I've been thinking a lot about my friends in Oregon. Why? Because the impending "Big One" that Californians are nervous about is actually a lot more likely to occur off the coast of Oregon—and would be an even "Bigger One" there.

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