Article Photos: Experts say Oklahoma earthquakes are too powerful to be man-made 6/35

Maintenance workers prepare to use a tarp to cover the damage to one of the spires on Benedictine Hall at St. Gregory's University in Shawnee, Okla., Sunday, Nov. 6, 2011. Two earthquakes in the area in less than 24 hours caused one of the towers to topple, and damaged the remaining three. (AP Photo/Sue Ogrocki) ORG XMIT: OKSO114