A magnitude 4.2 earthquake hit 22 km (13.6 miles) southwest of Patra in western Greece early on Tuesday.
There were no immediate reports of damage.
Professor of Geology at the University of Athens, Efthimios Lekkas, said that the quake hit at a depth of 10 km.
He added that “the earthquake was felt in Messolonghi, Aegio and Zakynthos, where there is a possibility that the beach of Navagio was also affected”.
Last week the authorities decided to shut down the beach of Navagio after the landslide that injured three people.