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2016-06-04 12:17:02

The Cascadia Subduction Zone off the coast of North America spans from northern California to southern British Columbia. Scientific evidence indicates that a magnitude 8.0-9.0 earthquake occurs along the 800-mile long fault on average once every 200 to 500 years. The last major earthquake and tsunami along the fault occurred over 300 years ago in 1700.

Image uploaded by Karen Graham
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