ACAPULCO, Mexico—A powerful earthquake struck southwestern Mexico near the beach resort of Acapulco on Tuesday night, killing at least one man who was crushed by a falling post, and causing rock falls and damaging buildings, authorities said. The 7.0 magnitude quake, which hit 11 miles northeast of Acapulco in Guerrero state, shook the hillsides around the city, downing trees and pitching large boulders onto roads. State governor Hector Astudillo told local television that a man was killed by a falling post. He and other authorities had earlier said there were no reports of major damage from the quake, which caused power outages in several states. Mexican President Andres Manuel Lopez Obrador said the temblor had not caused major damages in Guerrero, the neighboring region of Oaxaca, Mexico City and elsewhere. Acapulco is roughly 230 miles (375 km) from Mexico City. In the central Roma Sur neighborhood of Mexico City, lights …