This satellite image shows a small section of the island after a massive eruption destroyed most of it. AFP
"Alarming" images taken by New Zealand Defence Force (NZDF) reconnaissance flights showed an entire village destroyed on Mango island and numerous buildings missing on nearby Atata island, said the diplomat, Tonga’s deputy head of mission in Australia, Curtis Tu’ihalangingie.
"People panic, people run and get injuries," Tu’ihalangingie told Reuters. "Possibly there will be more deaths and we just pray that is not the case."
A satellite image shows green vegetation visibly growing on the Hunga-Tonga - Hunga-Haa'pai volcano in Tonga. AFP
Tonga police told the New Zealand High Commission that the confirmed death toll stood at two but with communications in the South Pacific island nation cut, the true extent of casualties was not clear.
Australia's Minister for the Pacific Zed Seselja said Tongan officials were hoping to evacuate people from the isolated, low-lying Ha'apai islands group and other outer islands where conditions were "very tough, we understand, with many houses being destroyed in the tsunami."
The United Nations had earlier reported a distress signal was detected in Ha'apai, where Mango is located. The Tongan navy reported the area was hit by waves estimated to be 5-10 metres (15-30 feet) high, said the UN Office for the Coordination of Humanitarian Affairs (OCHA).
Atata has a population of about 100 people and Mango around 50 people.
"It is very alarming to see the wave possibly went through Atata from one end to the other," said Tu’ihalangingie.
The NZDF images, which were posted unofficially on a Facebook site and confirmed by Tu’ihalangingie, also showed tarpaulins being used as shelter on Mango island.
British national Angela Glover, 50, was killed in the tsunami as she tried to rescue the dogs she looked after at a rescue shelter, her brother said, the first known death in the disaster.
CLEARING THE RUNWAY
A thick layer of ash blankets the islands, the New Zealand High Commission said, adding it was working to establish communications with smaller islands "as a matter of priority".
The archipelago's main airport, Fua’amotu International Airport, was not damaged in Saturday's eruption and tsunami but heavy ashfall is preventing full operations, hampering international relief efforts.
This satellite image shows an undersea volcano eruption at the Pacific nation of Tonga on Saturday. AP
The UN humanitarian office said Tongan officials had said that clearing the runway would take days as it was being done manually, by Wednesday at the earliest.
People on the western coast of the main island of Tongatapu had been evacuated because of "significant damage", OCHA added in an update, while government ministers had broadcast warnings on radio against price gouging amid worries of supply shortages.
The Tongan government is expected to formally request aid from countries including Australia and New Zealand tomorrow. Both antipodean nations have C-130 military aircraft on standby, packed with emergency supplies.
"The priority now will to be get supplies to Tonga and the biggest constraint on that at the moment ... is the airport. There is still a significant amount of ash," Seselja said.
Tonga is a kingdom of 176 islands, of which 36 are inhabited, with a population of 104,494 people.
The archipelago has remained largely cut off from the world since the eruption which cut its main undersea communications cable.
A combination of satellite images shows the Hunga Tonga-Hunga Ha'apai volcano before and after eruption. Reuters
Subcom, a US based private company contracted to repair various subsea cables in the Asia-Pacific, said it was working with Tonga Cable Ltd to repair the cable that runs from Tonga to Fiji.
Samiuela Fonua, the chair of Tonga Cable, said there were two cuts in the undersea cable that would not be fixed until volcanic activity ceased, allowing repair crews access.
"The condition of the site is still pretty messy at the moment," Fonua told the Australian Broadcasting Corp.
The island of Hunga Tonga-Hunga Ha'apai, which sits on the seismically active Pacific Ring of Fire, all but disappeared following the blast, according to satellite images taken about 12 hours later, making it difficult for volcanologists to monitor activity.
A Royal New Zealand Air Force C-130 Hercules landed in Tonga's Fua'amotu International Airport, a defence spokesperson said, after a blanket of volcanic ash was cleared off the runway.
Tongan Prime Minister Akilisi Pohiva, who was being treated for pneumonia at a hospital in Auckland, has died, New Zealand media said on Thursday. Pohiva, 78, was medevaced to Auckland Hospital on Wednesday, Radio New Zealand said.
Officials had warned that waves could reach three metres (10 feet) above high tide levels after the quakes - the strongest a magnitude 8.1 - but the threat had passed by the afternoon, the National Emergency Management Agency (NEMA) said.
The death toll from a New Zealand volcano eruption rose to eight on Thursday, with two victims dying in hospital, and will continue to climb with eight victims presumed dead on the island and more than 20 in intensive care suffering severe burns.
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