Tonga could be cut off for weeks after volcanic eruption knocked out undersea cable

Domestic network now active on most populous island as focus shifts to restoring international connections

The undersea telecommunications cable connecting Tonga to the rest of the world that was damaged by a volcano eruption will take at least a month to repair, its owner said on Wednesday, with the delay likely hampering disaster recovery efforts.

The eruption of the Hunga Tonga Hunga Ha'apai volcano, which killed at least three people and sent tsunami waves across the Pacific, knocked out connectivity to the archipelago on Saturday.

A specialist ship is aiming to set off from Port Moresby, Papua New Guinea, on a repair voyage this weekend, said Samiuela Fonua, chairman of cable owner Tonga Cable Ltd.

But with eight or nine days' sailing to collect equipment in Samoa followed by an uncertain journey towards the fault in the eruption area, he said it would be “lucky” if the job were done within a month.

“It could be longer than that,” he told Reuters by telephone from Auckland, where he has been co-ordinating the repair.

“The cables are actually around the volcanic zone. We don't know ... whether they are intact or blown away or stuck somewhere underwater. We don't know if it's buried even deeper.”

Telecom operator Digicel said its domestic network was active on Tonga's most populous island and it was now focused on restoring international connections. Tonga's government and state-owned Tonga Communications Corp could not be contacted.

Two New Zealand navy vessels will arrive in Tonga on Friday carrying critical water supplies for the Pacific island nation.

Hundreds of homes in Tonga's smaller outer islands have been destroyed after Saturday's huge eruption triggered tsunami waves that rolled over the islands, home to 105,000 people.

With Tonga's airport smothered by volcanic ash and communications badly hampered, information on the scale of devastation has come mostly from reconnaissance aircraft.

Red Cross teams said salt water from the tsunami and volcanic ash were polluting the drinking water of tens of thousands of people.

“Securing access to safe drinking water is a critical immediate priority … as there is a mounting risk of diseases such as cholera and diarrhoea,” said Katie Greenwood of the International Federation of Red Cross and Red Crescent Societies.

People clear debris off the street in Nuku'alofa, Tonga, following Saturday's volcanic eruption near the Pacific archipelago. AP

A damaged area in Nuku’alofa. AP

People clear debris off the street. AP

Damage was widespread. AP

Buildings were destroyed in the volcanic eruption and tsunami. Reuters

A massive clean-up operation has begun. AP

A picture taken by the New Zealand Air Force shows ash covering homes and vegetation. AFP

The port of Nuku’alofa suffered severe damage. AP

A relief worker in New Zealand stacks disaster relief supplies to be taken to Tonga by the country's air force. AFP

A New Zealand air crew map the extent of the damage in Tonga from a P-3K2 Orion aircraft. Reuters

A satellite image shows a sulphur dioxide cloud drifting across the Pacific Ocean on January 17 as a result of the volcanic eruption. Reuters

The undersea eruption caused high waves more than 10,000 kilometres across the Pacific in Peru. Oil was spilt there as surging tides hit a ship loading oil into La Pampilla refinery. AP

Cavero beach in Ventanilla, Peru, after the oil spill caused by the volcanic eruption in Tonga. AP

Fakahau Valu (left) and Lioneti Valu, a Tongan couple who have not been in contact with their daughter, Siniva Filise, since the eruption. PA

A parking lot in the harbour in Santa Cruz, California, was flooded by a tidal surge caused by the volcanic eruption thousands of kilometres away. AP

A boat dragged to the harbour mouth by the tidal surge in Santa Cruz, California, US. Reuters

New Zealand said Tonga, one of the few countries to be free of the coronavirus, had agreed to receive two of its ships, the Aotearoa and the Wellington, despite concerns about importing a Covid-19 outbreak that would exacerbate its crisis.

Simon Griffiths, captain of the Aotearoa, said his ship was carrying 250,000 litres of water, along with other supplies, and had the capacity to produce another 70,000 litres a day.

The Hunga Tonga Hunga Ha'apai volcano erupted about 65 kilometres from the Tongan capital Nuku'alofa with a blast heard 2,300km away in New Zealand, and sent tsunamis across the Pacific Ocean.

James Garvin, chief scientist at Nasa's Goddard Space Flight Center, said the force of the eruption was estimated to be more than 500 times that of the nuclear bomb the US dropped on the Japanese city of Hiroshima at the end of the Second World War.

Waves reaching up to 15 metres hit the outer Ha'apai island group, destroying all the houses on the island of Mango, as well as the west coast of Tonga's main island, Tongatapu, where 56 houses were destroyed or seriously damaged, the prime minister's office said.