Fatal Mine Collapse Covered 50 Acres, Began Near Miners

New calculations show that Utah's deadly Crandall Canyon mine collapse - which registered as a magnitude-3.9 earthquake - began near where miners were excavating coal and quickly grew to a 50-acre cave-in, University of Utah seismologists say in a report. They estimated the size of the collapse is about four times larger than was thought shortly after the time of the Aug. 6, 2007, disaster.

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