SINGAPORE, Jumada I 25, 1436, Mar 16, 2015, SPA -- A magnitude 6.3 earthquake struck off the Papua New Guinea island of New Britain on Monday, Reuters quoted the U.S. Geological Survey (USGS) as saying. The quake struck 6 miles (9 km), northwest of the town of Rabaul, on the northeast tip of New Britain island, it said. There were no immediate reports of any damage or casualties. --SPA 10:58 LOCAL TIME 07:58 GMT www.spa.gov.sa/w