ACAPULCO, Mexico — A powerful magnitude-7.2 earthquake shook central and southern Mexico today, sending panicked people into the streets, where broken windows and debris fell, but there were no early reports of major damage or casualties.

The U.S. Geological Survey said it was centered northwest of the Pacific resort of Acapulco, where many Mexicans are vacationing for the Easter holiday.

It was felt across at least a half-dozen states and Mexico’s capital, where it shook for at least 30 seconds. Around the region, there were reports of isolated and minor damage, such as fallen fences, trees and broken windows.

Chilpancingo, capital of the southern state of Guerrero, where the quake was centered, reported a power outage, but service was restored after 15 minutes.

The quake struck 170 miles southwest of Mexico City, where people fled high rises and took to the streets, many in still in their bathrobes and pajamas on their day off.

“I started to hear the walls creak and I said, `Let’s go,’” said Rodolfo Duarte, 32, who fled his third-floor apartment.

“This is really strong,” said Gabriel Alejandro Hernandez Chavez, 45, an apartment building guard in central Mexico City. “And I’m accustomed to earthquakes.”

The quake was centered 22 miles northwest of the town of Tecpan de Galeana, and was 15 miles deep.