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Man Made Earthquake

Workers walk away from Warren Hall on the California State University, East Bay Hayward Campus in Hayward, Calif. The 13-story Warren Hall, which opened in 1971, was determined by the California State University Seismic Review Board to be the most vulnerable building in the CSU system.

Man Made Earthquake

Workers imploded Warren Hall, for four decades a fixture of the East Bay

hillsides and the Cal State East Bay campus. The boxy building was

built roughly 2,000 feet from the Hayward fault, and officials recently

deemed it seismically unsafe. Scientists turned its destruction into a

valuable tool in their ongoing efforts to understand the earthquakes

that have shaped California.

It took just seconds for a 13-story building overlooking San Francisco

Bay to implode, spewing smoke and chunks of concrete as it crumbled into

a heap of rubble. But U.S. Geological Survey scientist Rufus Catchings

was marveling less at the visual spectacle than what he could feel with

his feet.