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![]() Date: 2011-05-02 11:43:44Plate tectonics Earthquake Seattle Fault Nisqually earthquake Cascadia earthquake Cascadia subduction zone Richter magnitude scale Olympia earthquake Northridge earthquake Geography of the United States Seismology Geography of North America | Source URL: www.crew.orgDownload Document from Source WebsiteFile Size: 2,33 MBShare Document on Facebook |