Tokyo: An earthquake registering a preliminary magnitude of 7.1 shook Kumamoto on Japan's southern main island of Kyushu late Tuesday afternoon. A tsunami advisory has also been issued, the Japan Meteorological Agency (JMA) said.
The quake occurred at a depth of 10 km (6 miles) below the sea surface, JMA said.
No damage or injuries were immediately reported after the 4:29 p.m. quake.
The quake occurred in the western region of Kumamoto, about 900 km (540 miles) southwest of Tokyo.
The US Pacific Tsunami Warning Center said there was no risk of a tsunami beyond local coasts.