The strong quake, which occurred at 11:12 p.m. local time, was centred about 167 miles (268 km) south of Yogyakarta, Java, Indonesia, at a depth of nine miles (15 km), USGS said.
Jaya Murjaya, a spokesman at Indonesia's meteorology agency, said there was no tsunami warning and no reports of any damage or casualties.
A 7.0 magnitude quake which struck off the coast of West Java on Wednesday killed more than 70 people, and damaged thousands of homes.
