A 6.1-magnitude earthquake struck off eastern Japan early Thursday, the Japan Meteorological Agency said, rocking buildings in the capital Tokyo and surrounding prefectures. No tsunami warning was issued.The 4:47 a.m. quake, which originated at a depth of about 36 kilometers, registered lower 5 on Japan's seismic intensity scale of 7 in Asahi, Chiba Prefecture, east of Tokyo. The agency warned quakes of similar intensity may follow over the next week in areas that experienced strong swaying.An intensity of lower 5 means people become frightened and feel the need to hold onto something stabl…READ FULL ARTICLE