The Cascadia Subduction Zone is located off the Pacific coast of the United States and Canada. It is responsible for the formation of the Cascade Mountains. Geologists believe a magnitude 9.0 earthquake could occur in the near future along this subduction zone.

The Cascadia Subduction Zone is located off the Pacific coast of the United States and Canada. It is responsible for the formation of the Cascade Mountains. Geologists believe a magnitude 9.0 earthquake could occur in the near future along this subduction zone.