Two strong earthquakes struck Papua New Guinea within half an hour of each other today, the US Geological Survey said.
Both had a magnitude above six on the Richter scale.
The epicentres of both quakes were around 525 kilometres north-east of Papua New Guinea's capital Port Moresby.
The Pacific Tsunami Warning Center said there was no threat of a widespread destructive tsunami from either quake, based on previous earthquake and tsunami data.