Article Photos: Oklahoma's seismic activity may not be over, experts say 12/40

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