A 6.3 magnitude earthquake shook the Pacific island nation of Papua New Guinea on Saturday, seismologists said, but there were no immediate reports of damage or injury. The trembler struck 68 kilometers (42 miles) northeast of the city of Lae and some 364 kilometers north of the capital Port Moresby, according to the US Geological Survey (USGS). Lae has a population of around 120,000, but locals said that while the quake was strongly felt, there were no reports of damage.