Cascadia: The West Coast Fault Line That Is "Nine Months Pregnant"
This fault is able to generate "Magathrust" quakes (8 or bigger) but because it is attached to the Andrea's fault line, it will cause a chain reaction and the resulting damage and devastation will be colossal. 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. The Cascadia Subduction Zone, which sits off the coast of Oregon, was the site of the largest known earthquake to have ever struck the Lower 48 American states: a magnitude 9 megathrust in early 1700 that sent a tsunami crashing into the Pacific coast, and across the ocean to Japan.