The earthquake occurred at 4:29 pm local time at the sea, 49 km northwest off the island of Casos and 391 km southeast from Greek capital Athens.
Other sources report, the epicenter was 122 km ENE of Heraklion, Crete in dept 0f 78 km.
The residents of Crete rushed in panic out of homes and work places and are still outside trying to recover form the shock. Accoridng to locals the tremor lasted more than 30 seconds.
There have been no immediate reports of damages or human injuries.