ATHENS, Greece (AP) _ A strong earthquake rattled the southern Greek port city of Kalamata on Sunday. There were no reports of injuries or serious damage.

The undersea quake had a preliminary magnitude of 5.4 and occurred at 8:55 a.m. (1:55 a.m. EDT), with an epicenter 185 miles southeast of the capital, the Athens Geodynamic Institute said.

The port city was the site of a 1986 earthquake that killed 20 people.

Dozens of earthquakes hit Greece every year, but they usually are of small magnitude and cause little damage.

A magnitude-5 quake can cause considerable damage.