Awwal 07, 1432, Feb 10, 2011, SPA - An undersea earthquake measuring 6.3 on theRichter scale struck off Indonesia's North Sulawesi province late Thursday, but there were no immediate reports of injury or damage, the country's seismology agency said, according to dpa. The quake struck at 9:39 pm Jakarta time (1439 GMT). Its epicentre was about 350 kilometres north-west of the North Sulawesi capital of Manado, Indonesia's National Meteorology and Geophysics Agency said. It occurred at a depth of about 521 kilometres. The earthquake did not yield a tsunami warning. -- SPA