The epicenter of the earthquake was located 46 kilometers (28.6 miles) southwest of the town of Tres Picos in Chiapas. It struck about 80 kilometers (50 miles) deep, according to the seismologists.
There were neither immediate reports of damage or casualties, nor a tsunami threat.
The last relatively deep earthquake occured near of Tres Picos in mid-December. The seismologists initially measured the strength of the earthquake at 6.4 but later upgraded it to a significantly stronger 6.6 magnitude.