Wednesday's major earthquake near Papua New Guinea's second largest city Lae has affected power supplies in the region.
The seven point three magnitude quake struck at a depth of around 115 kilometres about 3pm local time.
There have been no reports of injuries or serious damage, but the Ramu hydro power station shut down.
Our correspondent in Lae, Oseah Philemon, says this cut power supplies to Lae and the surrounding area.
"PNG Power personnel have actually been working around the clock ever since to restore power. Because what it also did, it shook the power lines and power poles, so it jolted the power lines a bit and my information is that it caused some slight damage but no serious, and they hope to restore power very soon."