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Cowlitz <br />Columbia <br />Skamania <br />Klickitat <br />Clark <br />Hood River <br />Sherman <br />Tillamook <br />Washington <br />Multnomah <br />Clackamas <br />50 MILE RADIUS <br />Sherman <br />Yamhill <br />Wasco <br />3 <br />4 <br />Marion <br />Polk <br />1 <br />SITE <br />2 <br />BentonJefferson <br />Linn <br />Crook <br />Deschutes <br />Lane <br />KlamathLake <br />Douglas <br />HISTORICAL EARTHQUAKE INFORMATION PROVIDED BY JOHNSON ET AL., 1994 <br />DISTANCE <br />EARTHQUAKES BY MAGNITUDE <br />DATEMAGNITUDE <br />(MILES) <br />6.1 + <br />1 1961 4.5 19 <br />5.1 TO 6 <br />2 1963 3.3 24 <br />3.1 TO 5 <br />3 1958 3.4 26 <br />0 TO 3 <br />0255012.5 <br />4 1993 5.6 32 <br />Miles <br />PREPARED FOR: CIVIL WEST CONSULTING ENGINEERS, INC. <br />PROJECT # <br />FIGURE <br />HISTORICAL SEISMICITY <br />72582.000 <br />C-1 <br />DETROIT LAKE WATER RESERVOIR <br />DATE <br />DETROIT, OREGON <br />NOV 2009 <br />