The quake occurred at 1745 GMT with an epicenter 255 kilometeres south of the town of Nusa Dua, APA reports citing Xinhua.
A 6.3-magnitude quake struck south of Indonesia's island of Bali at 1:45 am local time, the US Geological Survey reported.
The epicentre of the quake was registered at a depth of 10 km, the European-Mediterranean Seismological Centre (EMSC) said.
No injuries or damage have been reported so far.