An earthquake of 6.1 magnitude shook Mexico City during morning rush-hour on Wednesday, with no serious injuries or destruction reported in or around the capital.
The earthquake's epicenter is reported by the US Geological Survey to have been near Acapulco, on the Pacific coastline.
Mexico, "located atop three of the large tectonic plates... is one of the world's most seismologically active regions," the monitor group said, adding the tremor hit a depth of about 21.6 miles below sea level.
In 1985, a large 8.1 magnitude earthquake rocked Mexico and killed at least 6,000 people, destroying homes and other buildings.
Mexico City Mayor Miguel Angel Mancera said on Twitter that no one has yet been reported injured in the capital.