Mexico's president says the magnitude of the earthquake that hit his country is the biggest it has seen in a century.
Enrique Pena Nieto confirms at least five people have died, major damage has been caused, and one-million people initially had been without power following the quake.
The U-S Geological Survey has reported the quake had a magnitude of 8.1, but Nieto says it registered as 8.2.
Tsunami waves have been measured off Mexico's Pacific coast at one-metre above tide level.
The centre's forecast said Ecuador, El Salvador and Guatemala could see waves of a meter or less.