JAKARTA - A MODERATE 5.8-magnitude quake rattled Indonesia's Sulawesi island on Saturday, seismologists said, but there were no immediate reports of damage or injures, and no tsunami alert was issued.

The quake hit at 3.34am (18.34 Friday GMT, 2.34am Singapore time), at a depth of 103km, according to a revised report by the US Geological Survey (USGS).

The epicentre was 110km north-north-west of Ternate in the Moluccas and 260km east of Manado on Sulawesi.

The Hawaii-based Pacific Tsunami Warning Centre did not release a tsunami warning.

Indonesia sits on the Pacific 'Ring of Fire,' where the meeting of continental plates causes high volcanic and seismic activity.