Ghost Forests of the Pacific N.W.—Evidence for Cascadia's Past Earthquakes ("orphan tsunami")





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Published on Nov 22, 2011


This simplified animation illustrates both the subduction-zone processes that lead to a "ghost forest" as well as the evidence that scientists collected to determine that the Pacific Northwest has had many great earthquakes and tsunamis in the past, and will again in the future. This is based on the work of Brian Atwater who published his findings in the the book "The Orphan Tsunami of 1700" (USGS Professional Paper 1707),
Animation by Jenda Johnson, Earth Sciences Animated
Original background music from Jesse Gay, Portland OR.
Edited by Dr. Robert Butler, University of Portland OR
Photograph of Copalis from U.S. Geological Survey
Tree drowning sequence from the book At Risk: Earthquakes and Tsunamis on the West Coast by John Clague, Chris Yorath, and Richard Franklin, Tricouni Press, 20006


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