A 5.5-magnitude undersea earthquake has struck close to tourist hot spots Kos and Rhodes in Greece, the United States Geological Survey said.
It came just hours after a quake shook buildings in western Turkey, sending people running into the streets for safety, media reports said.
There were no initial reports of injuries or major damage from either tremor.
The second quake was 44 miles east of the Greek island of Karpathos, the second-largest of the Dodecanese islands, and south of Rhodes, in the Aegean Sea.
The European-Mediterranean Seismological Centre said it happened 25 miles down.
Just four days ago, a strong quake struck eastern Turkey, toppling buildings and causing 41 deaths.
More than 1,600 people were also hurt in the quake that occurred 4.34 miles deep.
Greece lies in one of the world’s most seismically active areas and earthquakes are common but fatalities and major damage are rare.
A magnitude-six quake in 1999 left 143 people dead and tens of thousands of buildings damaged.
