Papua New Guinea has been struck by a 7.1 magnitude earthquake centred 139km underground.
The earthquake took place 282km north of Port Moresby at 7:19am (local time).
There were no immediate reports of damage, although a video posted to Twitter shows the shaking was loud and severe.
"This was a big one that lasted for a bit in Lae. I only caught the tail end of it on film but it was big. You can hear it. Got stuff thrown around in the house and the power is now cut off," wrote resident Christopher Lam.
The Pacific Tsunami Warning Centre said there was no tsunami threat after the quake.