TOKYO — A strong earthquake with a preliminary magnitude of 7.4 has struck in the Pacific Ocean, triggering a tsunami warning off the southern coast of Japan.
Japan's Meteorological Agency said the quake occurred about 130 kilometers (80.6 miles) off the southern coast of Chichi Island in the Pacific Ocean. The offshore quake struck at around 2:20 a.m. (1720 GMT) at the depth of 10 kilometers (6.2 miles).
The U.S. Geological Survey also put the quake's magnitude at 7.4.
There was no immediate report of any damage or injuries.
About 170 people evacuated to several community centers and school buildings on the Chichi and nearby Haha islands, public broadcaster NHK said.