A remote part of northern Papua New Guinea was jolted by a strong earthquake of 6.9 magnitude in the early hours of Sunday (local time), according to the United States Geological Survey (USGS). The depth of the earthquake was measured at 35 km while the epicentre was 32 km east-north-east of the small settlement of Ambunti.A remote part of northern Papua New Guinea was jolted by a strong earthquake of 6.9 magnitude in the early hours of Sunday (local time), according to the United States Geological Survey (USGS). The depth of the earthquake was measured at 35 km while the epicentre was 32 km east-north-east of the small settlement of Ambunti.