The undersea tremor’s epicenter was located some 23 kilometers off the southeastern coast of the island, which is still recovering from an earthquake of 5.8 Richter in late September.
It struck at 12.24 p.m. and was felt across the broader region, rattling the islands of Kasos, Karpathos and Rhodes, and has been followed by a succession of aftershocks.
The fire service says there have been no immediate reports of injuries.
Efthymios Lekkas, head of Greece's earthquake planning body, tells state TV quake is unrelated to 5.8-level tremor theat struck the island last month, killing 1.