A 5.8-magnitude earthquake struck off Indonesia's Sulawesi island on Thursday but there was no tsunami threat and no immediate reports of damage, the Meteorology and Geophysics Agency said.

The quake, which struck at 3:11 pm (0811 GMT), was centered about 126 kilometers (78 miles) southeast of Bitung in Northeast Sulawesi, an official said.

The tremor, which was 10 km deep, had no tsunami potential, the agency added.

Indonesia was the nation worst hit by the earthquake-triggered Asian tsunami in December 2004, which killed some 168,000 people in the country's Aceh province.