TOKYO (Sputnik) – The quake occurred at 21:23 GMT on Wednesday at a depth of about 10 kilometers (6.2 miles), the USGS said.
On Tuesday, the Japan Meteorological Agency reported a 7.3-magnitude earthquake that hit the eastern part of the country's coast near the province of Fukushima and issued a tsunami warning. Soon after that the agency updated the magnitude of the tremor to 7.4.
In March 2011, a 9.0-magnitude offshore earthquake triggered a 46-foot tsunami that hit Japan's Fukushima nuclear power plant, leading to the leakage of radioactive materials and the shutdown of the plant. The accident is considered to be the world's worst nuclear disaster since Chernobyl.