Japanese authorities have canceled all tsunami warnings after a strong 7.1 magnitude earthquake shook the ocean floor east of Japan.
The U.S. Geological Survey
says the quake struck 326 kilometers off the coast, about 3 a.m. local time Saturday [1710 UTC Friday]. It was centered 10 kilometers below the ocean's surface.
The quake triggered a small tsunami along the east coast, but no damage is reported.
The quake hit about 400 kilometers from Japan's Fukushima Province, site of the ruined Fukushima Daiichi nuclear power station, which devastated by an earthquake and tsunami in March 2011.