A strong earthquake has shaken southern Greece, but there have been no reports of casualties or serious damage.

The quake measuring 6.5 on the Richter scale woke up residents of the Peloponnese region early Sunday, sending many in the streets.

Greek authorities say the quake occurred at the depth of more than 70 kilometers. It was centered about 80 miles southwest of Athens. Tremors were felt in the Greek capital.

Seismologists say two aftershocks were felt later in the morning.

Earthquakes are common in Greece.

Some information for this report was provided by AFP, AP and Reuters.