A moderate 5.8-magnitude earthquake rocked Indonesia's Sulawesi island on Monday, the US Geological Survey said.

The quake struck at 10.17am (02.17 GMT), at a depth of nearly 10 kilometres, 169 kilometres north-west of Kendari.

Indonesia's Geophysics and Meteorology Agency said there were no immediate reports of damage.

Two huge earthquakes struck off Indonesia's Sumatra island last week, triggering an Indian Ocean-wide tsunami alert and sending terrified people fleeing from the coast.

At a magnitude of 8.6, the first of the two quakes which hit Wednesday was the strongest since the 2004 Indian Ocean tsunami that killed 170 000 in Indonesia's quake-prone Aceh province.

But the tsunami watch on Wednesday was eventually lifted and no major damage was reported. - Sapa-AFP