Orphan Tsunami: Megathrust Earthquakes in the Pacific N.W.

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1992 tsunami damage in Indonesia

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Incorporated Research Institutions for Seismology (IRIS)


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 inthe future. This is based on the work of Brian Atwater who published his findings in the book "The Orhpan Tsunami of 1700."

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