The Free Press, Mankato, MN


Man Made Earthquake-15

United States Geological Survey research geophysicist Rufus Catchings gestures as he holds a seismograph Thursday, Aug. 15, 2013, in Hayward, Calif. The devices will be used to measure effects of the demolition of the 13-story Warren Hall on the California State University East Bay campus, determined by the California State University Seismic Review Board to be the most seismically vulnerable building in the CSU system. The Hall will be demolished on Saturday, Aug. 17, 2013. (AP Photo/Ben Margot)