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When people on the West Coast start talking about the Big One, the conversation usually runs straight to California and the San Andreas Fault. It is the famous one. The one most of us grew up seeing in disaster movies and hearing about on the news.
But Oregon has its own nightmare sitting offshore. The Cascadia Subduction Zone is a massive fault that runs roughly 600 miles from northern California to Vancouver Island. When it breaks, Oregon emergency officials say it could produce a magnitude 9 range earthquake and send a local tsunami toward the coast in as little as 10 to 20 minutes.
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