Cal State East Bay building implodes

August 17, 2013 | 4:39 p.m. CDT
Warren Hall is imploded Saturday on the campus of Cal State East Bay in Hayward, Calif. The former administration building has been vacant for two years because it was declared seismically unsafe. The U.S. Geological Survey scientists had placed more than 600 seismographs in concentric circles within a mile of the building to pick up the vibrations. They hope the unique experiment will help map out where the ground might shake the most when the big one hits.

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