A shallow 5.1-magnitude earthquake rocked Indonesia's Sulawesi island on Tuesday, the US Geological Survey said.
The quake struck 11 kilometres east of Mamasa in west Sulawesi at 2:35 am (18:35 GMT), according to USGS. No tsunami warning was issued.
It comes after a 7.5-magnitude quake and a subsequent tsunami razed swathes of the city of Palu on Sulawesi island on September 28.
The disaster killed more than 2,000 people and displaced more than 220,000.
A survivor of last month's Palu quake. Source: AAP
Indonesia, one of the most disaster-prone nations on earth, straddles the so-called Pacific "Ring of Fire", where tectonic plates collide and many of the world's volcanic eruptions and earthquakes occur.
