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Scientists say that the Cascadia subduction zone off the coast of the Pacific Northwest has the potential to spark a magnitude-9.0+ earthquake, plus a subsequent tsunami. That scenario last ...
Of particular concern are signals of massive earthquakes in the region’s geologic history. Many researchers have chased clues of the last “big one”: an 8.7-magnitude earthquake in 1700.
One strong line of evidence for these earthquakes is convergent timings for fossil damage from tsunamis in the Pacific Northwest and historical Japanese records of tsunamis. [28] The next rupture of the Cascadia subduction zone is anticipated to be capable of causing widespread destruction throughout the Pacific Northwest. [29]
The Pacific Northwest is a diverse geographic region, dominated by several mountain ranges, including the Coast Mountains, the Cascade Range, the Olympic Mountains, the Columbia Mountains, and the Rocky Mountains. The highest peak in the Pacific Northwest is Mount Rainier, in the Washington Cascades, at 14,410 feet (4,392 m).
Region 4: West. Division 8: Mountain (Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming) Division 9: Pacific (Alaska, California, Hawaii, Oregon, and Washington) Puerto Rico and other US territories are not part of any census region or census division. [9]
Atmospheric river events are common phenomena for the Pacific Northwest region, as multiple occur during the autumn and winter seasons every year. The active pattern for the Pacific Northwest is ...
The Columbia River (Upper Chinook: Wimahl or Wimal; Sahaptin: Nch’i-Wàna or Nchi wana; Sinixt dialect swah'netk'qhu) is the largest river in the Pacific Northwest region of North America. [14] The river forms in the Rocky Mountains of British Columbia, Canada.
The most important clue linking the tsunami in Japan and the earthquake in the Pacific Northwest comes from studies of tree rings (dendrochronology), which show that several "ghost forests" of red cedar trees in Oregon and Washington, killed by lowering of coastal forests into the tidal zone by the earthquake, have outermost growth rings that formed in 1699, the last growing season before the ...