The 4:16 a.m. quake registered upper 5 on the Japanese seismic intensity scale of 7 in Kisarazu and lower 5 in Kimitsu, both in Chiba Prefecture, and 4 in areas such as Tokyo's Chiyoda and Shinagawa wards, according to the Japan Meteorological Agency. It also measured 4 on the scale in Mihama Ward of the city of Chiba and some wards of Yokohama and Kawasaki, both south of Tokyo. The temblor originated in southern Chiba Prefecture, eastern Japan, at a depth of around 40 kilometers.