damaging magnitude 7.0 earthquake. In addition to extensive damage to unreinforced structures and structures built on fill (such as much of Seattle's Pioneer Square area, the industrial area, and the waterfront), computer modeling has shown that such earthquakes could cause a tsunami of about high on Elliott Bay. The modeling shows that such a tsunami would also inundate the industrial areas on Commencement Bay 30 miles south (Tacoma) and low-lying areas on the Puyallup River delta. There is also concern that a severe or prolonged event could cause failure of the Duwamish or Puyallup River deltas, where the main port facilities for Seattle and Tacoma are located (Harbor Island and Commencement Bay). See also Geology of the Pacific Northwest Tacoma Fault Notes Sources Further reading External links USGS Professional Paper 1560: Assessing Earthquake Hazards and Reducing Risk in the Pacific Northwest Technical, but readable. And has many good pictures. USGS: Reducing Earthquake Hazards in the Pacific Northwest USGS: Earthquake ground motion movies Scenario for a Magnitude 6.7 Earthquake on the Seattle Fault Vivid and comprehensive. Washington State's Bridge Seismic Retrofit Program Earthquake Study: Four Vashon-Specific Scenarios Considerations for all islands. Puget Sound Tsunami Inundation Modeling (NOAA) Elliott Bay inundation map (DNR) Tsunami Hazard Map of the Elliott Bay Area (NOAA) Additional inundation maps (DNR Publications) Puget Sound Lidar Consortium Use of Lidar for locating faults. Geography of Seattle Seismic faults of Washington (state) Buried rupture earthquakes