Model: not available. The 700-mile-long Cascadia subduction zone that's just off the coast of California, Oregon and Washington will, sooner or later, produce a mammoth earthquake, scientists say. Stretching off the Pacific shore from northern California some 1300 kilometers to the tip of Vancouver Island, the Cascadia subduction zone appears capable of its own magnitude 9 earthquake.
Cascadia is America's own tectonic version of Sumatra, where the magnitude 9.3 earthquake and tsunami of 2004 occurred. The Cascadia Subduction Zone off the coast of North America spans from northern California to southern British Columbia. Make: not available. ISO: not available.
Map of the Cascadia Subduction Zone showing contours of uplift in the past fifty years in millimeters, from C. Mitchell and R. Weldon, University of Oregon (left) and from R. Hyndman and K. Wang, Pacific Geoscience Centre (right). This subduction zone can produce earthquakes as large as magnitude 9 and corresponding tsunamis. I absolutely agree there is an imminent risk of a significant earthquake & tsunami – but that’s about all I agree with in the blog post. Map by Washington State Geology. In fact, this post recently received some coverage on Portland’s KGW. Photo by Mustafa Lazkani - Feb 02, 2016. Oral traditions of people native to the Pacific Northwest and lots of scientific data point clearly to a major earthquake along the Cascadia Subduction Zone in 1700, and another one is looming. Most people don't associate the US Pacific Northwest with earthquakes, but maybe they should.