Two large earthquakes struck western Mexico, shaking buildings as far away as the capital and sending people rushing out of offices onto the streets, the U.S. Geological Survey said.
There were no reports of major damage after the first of the two tremors.
The USGS said the first quake on Wednesday evening in the western state of Michoacan had a magnitude of 6.5 -- and was recorded at a depth of 12.4 miles.
The second quake, in the early hours of Thursday off Baja California, was stronger at a magnitude of 6.9 and shallower at a depth of 6.2 miles.