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A fault off the Pacific coast could devastate Washington, Oregon and Northern California with a major earthquake and tsunami. Researchers mapped it comprehensively for the first time.
The Cascadia subduction zone is a 960 km (600 mi) fault at a convergent plate boundary, about 100–200 km (70–100 mi) off the Pacific coast, that stretches from northern Vancouver Island in Canada to Northern California in the United States.
Japanese tsunami records, along with reconstructions of the wave moving across the ocean, put the earthquake at about 9:00 PM Pacific Time on the evening of 26 January 1700. [4] Cascadia subduction zone Sandsheet thought to have resulted from the tsunami caused by the 1700 earthquake, exposed on the bank of the Salmon River, Oregon
Scientists now know the 700-mile fault called the Cascadia Subduction Zone, 100 miles off the coast of Northern California stretching north to Vancouver Island, could trigger a 9.0 magnitude ...
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The Cascadia quake created a tsunami that hit Japan about nine hours later. "When people put all of that together, there was really only one explanation," Melgar Moctezuma said. "Modeling shows ...
The Pacific Northwest is seismically active. The Juan de Fuca Plate is capable of producing megathrust earthquakes of moment magnitude 9: the last such earthquake was the 1700 Cascadia earthquake, which produced a tsunami in Japan, [5] and may have temporarily blocked the Columbia River with the Bonneville Slide. [6]
English: Map of the proposed country of Cascadia, incorporating both the political and bioregional models. Català: Mapa de Cascàdia, on s'indica tant el possible estat com la bioregió. Date