A 5.5-magnitude earthquake hit Mexico, 10 km to the south of Salina Cruz, the country's national seismological organisation said.
The US Geological Survey (USGS) has measured the quake at 5.4 on the Richter scale, adding that its epicentre was registered at a depth of 25.6km.
Photos were shared online of people standing outside in Salina Cruz after the quake.
A video has emerged of Christmas decorations swaying in the quake.
No damage or injuries have been reported as yet.