TOKYO -- An earthquake with a preliminary magnitude of 5.7 struck off Iriomote Island, southwestern Japan at 10:42 pm local time (1345 GMT), Japan Meteorological Agency (JMA) said Thursday.

The temblor was centered in the waters near Iriomote Island, southwestern Japan with the epicenter at a latitude of 24.2 degrees north and a longitude of 123.8 degrees east and at depth of 20 km.

The earthquake logged lower 5 in some parts of Okinawa prefecture on the Japanese seismic intensity scale which peaks at 7.

So far no major damage or injuries were reported, and no tsunami warning has been issued.