A 7.0-magnitude quake struck off the northeast of Papua New Guinea on Tuesday, the US Geological Survey said, but there was no tsunami warning issued.
The quake hit at 5:13 pm (0713 GMT) 141 kilometres (88 miles) north of the country's second largest city of Lae and 443 kilometres from the capital Port Moresby at a depth of 201 kilometres, it said.
"A destructive tsunami was not generated based on earthquake and historical tsunami data," the Pacific Tsunami Warning Center said in a statement.
Quakes of such magnitude are common in impoverished Papua New Guinea, which sits on the so-called 'Pacific Ring of Fire', a hotspot for seismic activity due to friction between tectonic plates.
Last month, the country was hit by a 6.7-magnitude earthquake but while the tremor was widely felt it was too deep to cause much damage.
Earlier in March, a 6.4-magnitude earthquake struck the New Britain region of the country, with no damage or injuries reported.
A giant tsunami in 1998, caused by an undersea earthquake, killed more than 2,000 people near Aitape, on the country's northwest coast.