Seismology: Instant Earthquake

Since April 1962, no less than 700 mild earthquakes have been recorded in the area around Denver. The tremors have done practically no damage, but in a part of the country that knew no quakes at all for 80 years before the current flurry, Denver's citizens were understandably concerned. What was causing the trouble? Would the quakes get worse?

Not until last November, though, did anyone offer reasonable answers. Then Consulting Geologist David Evans suggested that the quakes under the suddenly shaky Colorado terrain could be traced to a deep well at the nearby Rocky Mountain Arsenal. Military and civilian...

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