Cascadia Mega-Fault Due to Rupture

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…sometime in the next 500 years, according to a great blog a couple weeks back by the PSSN’s John Vidale, a regular contributor to their “Seismo Blog” How likely is it to go? Well you’ll have to read his blog that breaks down some of the inputs to evaluating the actual risk factor – which I think he never actually stated…

There’s a whole list of interrelated blogs on this topic which I saw after reading Ben Jervey’s nice post on the subject – which is a commentary of the NY Times post on this regular mega-quake. Basically the quakes happen roughly every 500 years and it will soon be 312 years since the last one on January 26, 1700. We’re due – the question is just when…

Comparison of the history of subduction zone earthquakes along the Cascadia Subduction Zone in northern California, Oregon, and Washington, with events from human history. Ages of earthquakes are derived from study and dating of submarine landslides triggered by the earthquakes. Earthquake data provided by Chris Goldfinger, Oregon State University; time line by Ian P. Madin, DOGAMI.Ian P. Madin, DOGAMI put together an excellent timeline of these mega (and not-quite-mega) quakes, using earthquake data from Chris Goldfinger, OSU). that was put out with a lot of other helpful factoids in the Oregon Department of Geology and Mineral Industries’ Winter 2010 Newsletter.

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