JAKARTA - A strong earthquake struck off Indonesiaâs eastern Sulawesi island on Monday, but there were no immediate reports of casualties or damage, authorities in the closest major city said. The 6.2 magnitude quake hit at 6:58 a.m. (2358 GMT on Sunday) with the epicentre 400 kilometres (250 miles) under the Sulawesi Sea, near the border with the Philippines.âIt was under sea. We donât have any damage reported,â said Artina, an official the Geological and Meteorology Agencyâs office in the North Sulawesi capital of Manado, 250 kilometres (155 miles) east of the epicentre. Manado is some 2,200 kilometres (1,400 miles) northeast of Jakarta.