Tokyo ( CNN ) -- A 6.4-magnitude earthquake struck Sunday morning off the east coast of Honshu , Japan , the U.S. Geological Survey said . The earthquake was centered 27 miles ( 43.5 kilometers ) beneath the surface about 114 miles ( 184 kilometers ) northeast of Tokyo , the agency said . There were no immediate reports of injuries or damage . The country 's Nuclear and Industrial Safety Agency said there were no reports of problems at the Fukushima Daiichi nuclear plant as a result of the earthquake , according to Japanese broadcaster NHK . The plant was crippled by a much more powerful earthquake on March 11 . Japan has been struck by hundreds of aftershocks off the coast of Honshu since that quake .
NEW : Fukushima plant not damaged by Saturday quake , broadcaster NHK reports . 6.4-magnitude earthquake strikes off coast of Honshu , Japan . There are no immediate reports of injuries or damage .