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<br />391136 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Two other centers of sei smic acti vi ty are wi thi n a 200-mile radi us of the <br />study area. The nearest of the two is in the vicinity of the Rocky Mountain <br />Arsenal complex just north of Denver, where 35 earthquakes ranging from 2.1 to <br />5.3 on the Richter scale occurred between 1962 and 1971. That activity was <br />associated with the subsurface disposal of fluid waste. The other center of <br />earthquake activity is near Price, Utah, 150 miles southwest of the study <br />area. Fifteen earthquakes have been recorded in this area, but few have been <br />felt and no damage has been reported. <br /> <br />3-4 <br />