A proposed site for a Century City tower may lie above an active fault line. The Los Angeles City Council said when it approved the building in 2009, it did not mandate a prior fault investigation. The Santa Monica fault is approximately 25 miles in length and runs from the Pacific Ocean to Century City. Seismologists say this fault may be able to produce an earthquake with a magnitude exceeding 7.0. Experts said that the area in which the tower would be built is in a zone of earthquake faults.