(CNN) -- A 7.6-magnitude earthquake has struck just off the southwestern coast of Mexico, according to the US Geological Survey (USGS).
The Tsunami Warning Center has issued a tsunami alert warning of potentially hazardous waves striking Mexico immediately.
There are no known casualties or damage yet recorded in Mexico City, according to the city's mayor, Claudia Sheinbaum.
The USGS provided more detail, saying that the quake struck about 23 miles (37 kilometers) southeast of the city of Aquila, in Michoacan state. The quake depth was about 9.4 miles (15.1 kilometers), the USGS also reported.
The epicenter of that 7.1-magnitude earthquake was 2.8 miles (4.5 kilometers) east-northeast of San Juan Raboso and 34.1 miles (55 km) south-southwest of the city of Puebla, in Puebla state, the USGS reported at the time.