I've mentioned before about the hundreds of prisms lining the wall of the open pit. Each one is continuously tracked by scanners placed around the rim. This series of plots shows a particular area that had been scheduled to fail in the next week or so but has accelerated to the point where collapse is at anytime. All employees and equipment (except for the suicidal prisms) have been moved out of that area of the pit awaiting the all clear to return to work.
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