A strong 6.0-magnitude earthquake has struck off Japan's southern island of Okinawa, the US Geological Survey says. The quake struck at 4:19am (local time), 165 kilometres north-west of Okinawa's capital Naha at a depth of 138 kilometres. There were no immediate reports of casualties or damage.
About 20 per cent of the world's most powerful earthquakes strike Japan.
* Thursday, March 26, 2009 at 19:19:57 UTC
* Friday, March 27, 2009 at 04:19:57 AM at epicenter
Location 27.425Â°N, 126.770Â°E
Depth 138.1 km (85.8 miles)
Region NORTHWEST OF THE RYUKYU ISLANDS
165 km (105 miles) NNW of Naha, Okinawa, Japan
420 km (260 miles) NE of Ishigaki-jima, Ryukyu Islands, Japan
580 km (360 miles) ESE of Ningbo, Zhejiang, China
1530 km (950 miles) WSW of TOKYO, Japan