Portland, Oregon, faces seismic risk from both the Cascadia Subduction Zone off the coast and local faults. Credit: Amateria1121, CC BY-SA 3.0, via Wikimedia Commons

Portland, Oregon, faces seismic risk from both the Cascadia Subduction Zone off the coast and local faults. Credit: Amateria1121, CC BY-SA 3.0, via Wikimedia Commons

Portland, Oregon, faces seismic risk from both the Cascadia Subduction Zone off the coast and local faults. Credit: Amateria1121, CC BY-SA 3.0, via Wikimedia Commons

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