An earthquake with a magnitude of 7.6 struck 37.1 km southeast of Aquila, Mexico at 1:05 pm local time.
The earthquake was at a depth of 15 kilometres and prompted tsunami warnings for portions of Mexico.
The Pacific Tsunami Warning Center warned that tsunami waves have been observed and hazardous tsunami waves were expected for some western coasts of Mexico.
Waves of 1 to 3 metres above tide level were possible.
There is no tsunami danger for the U.S. West Coast, British Columbia, or Alaska.
At least one person has died in Manzanillo. The earthquake was felt as far away as Mexico City. Several buildings were evacuated as a precaution.