OAXACA, Mexico (AP) - A strong earthquake along the Pacific coast rattled much of Mexico Thursday, damaging hundreds of buildings and killing at least a dozen people. The U.S. Geological Survey in Golden, Colo., said the magnitude-7.5 quake was centered between the Pacific resorts of Huatulco and Puerto Escondido in Oaxaca state, 280 miles south of Mexico City. A pool of blood on the sidewalk in downtown Oaxaca city marked the spot where 18-year-old Teresa de Jesus Garcia was killed by a stone cornice that fell from a building during the quake in this colonial-era city 220 miles southeast of Mexico City. Garcia, a stationery store employee, apparently rushed out of the building when the quake struck, only to be crushed by the falling stone outside.