A moderate earthquake measuring 5.8 on the Richter Scale rocked Indonesia's Sulawesi island today. The US Geological Survey said the quake struck at 10:17 am (local time) at a depth of nearly 10 kilometres, 169 kilometres northwest of Kendari. Indonesia's Geophysics and Meteorology Agency said there are no immediate reports of any damage or casualties. Two strong earthquakes struck off Indonesia's Sumatra island last week, triggering an Indian Ocean-wide tsunami alert and sending terrified people fleeing from the coast.