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Earthquake Analysis

Posted on 31st July 2014 at 09:02

Scientists from the U. S. Geological Survey and the University of Washington are going back over sediment samples that were taken decades ago. They’re looking to see if those core samples have information about ancient earthquakes, and if those samples can help fill in the blanks about when we can expect “the next big one” to hit the Cascadia Subduction Zone. A new report is out from the USGS and the universities working on this research, and they’re saying that finding the answer is more complicated than they first thought. They’re reappraising cores that were taken during the 60’s and 70’s, collected from an area near the foot off of the continental slope off of Washington and Oregon. A 2012 report that looked at just a few of those cores supports previous findings of Cascadia earthquake size and occurrence, but a wider review reveals what they call “confounding evidence.” The full report is now available on-line in “Geology” a leading earth science journal.