Buildings swayed and power lines were knocked out in Mexico City as a strong earthquake (7.3 on the Richter scale) rocked southern Mexico, nearly 10 years to the day after a deadly quake killed more than 6,000 people on Sept. 19, 1985. "This time the city was much better prepared," reports TIME's Elizabeth Love in Mexico City. "The ambulances were dispatched immediately, and the Red Cross and the police were well-coordinated. They seemed to have learned from the last quake." No deaths or major structural damage were reported from the temblor, which was centered 190 miles south of Mexico City.