A shallow 7.0-magnitude earthquake has struck off the coast of Vanuatu, triggering tsunami warnings within 300km of the epicentre.
The quake was 10km deep and struck at 7:33am NZ time, according to the United States Geological Survey. The earthquake initially registered as a 7.3-magnitude, but was revised downwards.
The Pacific Tsunami Warning Centre says: "hazardous tsunami waves from this earthquake are possible within 300km of the epicentre along the coasts of Vanuatu".
The waves could reach between one and three metres above the tide level along some coasts of Vanuatu, with waves up to 0.3m possible for Fiji, New Caledonia, Papua New Guinea, Solomon Islands and Tuvalu.
New Zealand Civil Defence says there is no tsunami threat to New Zealand.
There is no tsunami threat to Australia, according to the Australian Bureau of Meteorology.
Mayumi Green, in Luganville which is 64km away from the epicentre, reported on Facebook feeling "a short but a big shake".
"Water in the swimming pool going everywhere after the shake and power cut just a short time."
Shane Deitz, head coach of the Vanuatu national cricket team, reported he felt shaking in the capital Port Vila, 182km south-southeast from the epicentre.
It is not known if there has been any damage or injuries.