A magnitude 7.2 earthquake struck off the coast of Papua New Guinea on Thursday, the U.S. Geological Survey said.
A local tsunami warning was issued after the quake but has now been lifted.
The quake, which struck 150 km southwest of the town of Arawa, was relatively shallow, at a depth of 10 km. There were no immediate reports of damage or casualties.
It was the latest in a series of strong tremors to hit the region in recent days, including a magnitude-7.4 quake on Tuesday.