Seismologists confirm Utah mine collapse caused temblor

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UC Berkeley researchers have categorized earthquakes (blue) underground explosions (pink) and crack collapses (green) according to volume change and other parameters. The Utah temblor of Aug. 6 (red star) falls within the area of an underground cavit ...
UC Berkeley researchers have categorized earthquakes (blue), underground explosions (pink) and crack collapses (green) according to volume change and other parameters. The Utah temblor of Aug. 6 (red star) falls within the area of an underground cavity collapse, showing that it was not an earthquake. (Graphic by Doug Dreger and Sean Ford/UC Berkeley)

A 3.9 magnitude temblor recorded at the time of a mine collapse in southern Utah on Monday, Aug. 6, was not from an earthquake, but more likely the result of the collapse itself, according to an analysis by University of California, Berkeley, seismologists.


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