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Old-growth tree rings show evidence of 1700 tsunami

By Michelle Klampe

Oregon State University Writer

Core samples taken from a stand of old growth Douglas-fir trees in the South Beach area just south of Newport showed reduced growth following the 9.0 earthquake and subsequent tsunami that struck the Pacific Northwest in 1700.

The physical evidence from the Douglas-fir tree rings confirms modeling that depicts the reach of the January 1700 quake, which was the last major earthquake to hit the Cascadia Subduction Zone, said Robert Dziak, a Hatfield Marine Science Center-based scientist with the National Oceanic and Atmospheric Administration...

 
 
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