JAKARTA (AFP) - A 5.7-magnitude earthquake struck off the west coast of Indonesia's Aceh province on Tuesday, but there was no threat of a tsunami and no immediate reports of damage, geologists said. The epicentre of the quake, which hit 68 kilometres (42 miles) deep and struck at 5:29 pm (1029 GMT), was 112 kilometres southwest of provincial capital Banda Aceh, the Meteorological and Geophysics Agency (BMG) said. "For the time being, there have been no measurements of raised water levels," BMG official Rudi told AFP. No reports of damage have been received by the agency, he added. Aceh was the region worst hit by the quake-triggered Asian tsunami in December 2004, with close to 170,000 killed.