Earthquake rattles Japan's southern island of Okinawa

Japan: A preliminary magnitude of 5.7 earth quake has shook Okinawa and other southern Japanese islands on Monday said Japan Meteorological Agency adding that there there was no danger of a tsunami.

The Agency said the quake occurred at 2:20 pm local time on Monday off the coast of Okinawa, at the depth of 40km below the sea surface.

The earth quake in the south came just minutes after another relatively strong tremor hit the north.

A magnitude 5.5 earthquake occurred just off the southern coast of Hokkaido, Japan's northernmost main island.

There were no immediate reports of damage or injuries from the two earthquakes that struck almost simultaneously at both ends of the Japan's archipelago.