A moderate earthquake measuring a preliminary magnitude of 3.9 jolted southern Nagano Prefecture and surrounding areas in central Japan Saturday night, Kyodo News reported.

The 11:10 p.m. (1400 GMT) quake, which was originated from about 10 kilometers below ground, measured 4 on the Japanese seismic intensity scale of 7 in the southern part of Nagano Prefecture, and was also felt in Nakatsugawa city of neighboring Gifu Prefecture, according to the Japan Meteorological Agency.