An earthquake measuring 5.2 on the Richter scale jolted 63km WSW of Mouzaki, Greece at 01:05:31 GMT on Tuesday, the U.S. Geological Survey said.
The epicentre, with a depth of 15.42 km, was initially determined to be at 37.4893 degrees north latitude and 20.1707 degrees east longitude.
So far, there have been no reports of casualties or property damage.