TOKYO – Japanese authorities issued a warning for a tsunami of up to 1 meter (3 feet) after a strong earthquake struck in the seas south of Okinawa.
The Japan Meteorological Agency said epicenter of the magnitude 6.8 quake on Monday morning was at a shallow point near the Yonaguni islands.
The tsunami warning remained in force for over an hour after the quake struck, but authorities said it was unclear if atsunami had hit shores of islands in the area.
Television footage of a nearby island showed calm seas, but residents were warned to stay away from the shore.
The public broadcaster NHK said there were no initial reports of damage.