An earthquake of magnitude 7.9 has struck west of Arawa on Bougainville island, Papua New Guinea.
An advisory from the Pacific Tsunami Warning Centre said that widespread tsunami waves were "possible" following the quake.
The US Geological Survey, which said the earthquake struck at a depth of 167 kilometers (103 miles), downgraded the quake from its initial measurement of magnitude 8.
There are no immediate reports of casualties or damage.
The Pacific Tsunami Warning Centre said widespread tsunami waves were possible following the 8.0 magnitude quake.Read the full story ›
An aggressive species of fish which can survive on land for days has been caught on camera as experts fear it could be headed for Australia.Read the full story ›
Tourists on a sightseeing boat tour in Papua New Guinea got more than they bargained for when a volcano erupted right in front of them.Read the full story ›
A tsunami warning canceled for Papua New Guinea and the Solomon Islands the Pacific Tsunami Warning Center has said
An earthquake with a magnitude 7.8 has been recorded off Papua New Guinea, the US Geological Survey said.
The Pacific Tsunami Warning Center has said a tsunami warning was in effect for Papua New Guinea and the Solomon Islands after the earlier earthquake.
The quake, at a depth of 10 km (6 miles), hit 68 km southwest of Panguna.
A magnitude 6.7 earthquake has struck off Papua New Guinea's north coast city of Lae, the United States Geological Survey said.
The quake, about 150 km (95 miles) east of Lae, was initially recorded at a depth of about 20 km, although that figure was later revised to 87 km.
The Pacific Tsunami Warning Centre said there was no Pacific-wide tsunami threat.
Prince Charles and the Duchess of Cornwall have been visiting Papua New Guinea as part of their Diamond Jubilee tour.
The royal couple arrived at the Sir John Guise Stadium in the capital of Port Moresby to a cheering crowd of 5,000.
After an open air church service Charles presented new colours to the Royal Pacific Islands Regiment.
During a speech to the crowds Charles spoke in Pidgin English and said: "I bring you greetings from Her Majesty the Queen of Papua New Guinea and from all my family members during this celebration of the Diamond Jubilee of the Queen. Was my Pidgin correct?"
"This is a great day and a magnificent spectacle. We are gathered here to celebrate the Queen's 60 years of service to others.
"I know how honoured Her Majesty is to be your Queen, a title borne by her with immense pride and renewed by the people of this great country upon independence in 1975."
Thousands of school children paraded into the stadium for the royals.
The Prince of Wales and Duchess of Cornwall are to experience Papua New Guinea village life as part of their tour to mark the Queen's Diamond Jubilee year.
Charles and Camilla will travel to the coastal settlement of Boera to see how people live and keep their traditions alive.
They will tour craft stalls and watch a war dance before the Prince and Duchess will learn about conservation work to preserve coastal mangrove forests and plant saplings to highlight the project.