An earthquake struck western Greece on Sunday, but no injuries or damage were reported.
The US Geological Survey said the 5.7 magnitude quake struck at 1023 GMT at a depth of 20.5 miles (33 km).
The Athens Geodynamic Institute measured the quake at 5.4 and said it was centered off the southwestern coast of the Ionian island of Zakynthos, 330 km away from Athens.
Police and witnesses said there were no reports of injuries or damage.
"We felt the earthquake but there are no immediate reports of any damage," said a police official in Zakynthos. Greece is regularly hit by earthquakes.