JAKARTA - A strong 5.9-magnitude earthquake struck the Indonesian province of Aceh on Thursday, but there were no immediate reports of damage or casualties, a seismologist said. The undersea quake, which hit at 9:01 am (0201 GMT), was centred 170 kilometers (105.4 miles) under the seabed off the western coast of Aceh, a staff member at IndonesiaÂ’s meteorology agency said.The quake occurred roughly 65 kilometers southwest of Sinabang, which lies on the island of Simeulue, and was felt in Banda Aceh, the provincial capital, the agency said.