Jakarta, Sha'ban 26, 1437, June 02, 2016, SPA -- An earthquake measuring 6.5 on the Richter scale rocked the western part of Sumatra island on Thursday, but there were no immediate reports of damage, the geophysics agency said, according to dpa. The quake occurred at 5:35 am (2335 GMT Wednesday) with the epicentre 79 kilometres south-west of Pesisir Selatan district, at a depth of 72 kilometres, according to the Meteorology, Geophysics and Climatology Agency. --SPA 03:21 LOCAL TIME 00:21 GMT www.spa.gov.sa/w