TOKYO, April 21 (Xinhua) -- An earthquake with a preliminary magnitude of 5.6 struck Japan's Ogasawara Islands, with no tsunami warnings issued, the Japan Meteorological Agency (JMA) said on Friday.
According to the JMA, the quake occurred at 4:20 p.m. local time at a depth of about 10 km in the adjacent sea of Chichijima Island, measuring 4 on Japan's seismic intensity scale which peaks at 7.
The temblor's epicenter was located at a latitude of 27.0 degrees north and a longitude of 141.5 degrees east.
The agency did not issue a tsunami warning. ■