A tsunami warning has been issued after a massive 7.6 magnitude earthquake struck in the Pacific Ocean off Australia's east coast.

The Pacific Tsunami Warning Centre said tsunami waves could hit areas close to the French territory of New Caledonia, about 1,400km off Australia's coast.

The 10km deep undersea quake struck about 4am on Wednesday, 155km south-east of the Loyalty Islands off New Caledonia's east coast.

A tsunami warning has been issued after a massive 7.6 magnitude earthquake struck in the Pacific Ocean off Australia's east coast

The Pacific Tsunami Warning Centre said tsunami waves could hit areas close to the French territory of New Caledonia, about 1,400km off Australia's coast (pictured: New Caledonia)

'Tsunami waves reaching 1 to 3 meters above the tide level are possible along some coasts of New Caledonia and Vanuatu,' the PTWC said.

There is no tsunami threat to New Zealand, according to the New Zealand Civil Defence.

There were no reports of immediate damage, injuries or casualties.

More to come.