The U.S. Geological Survey (USGS) put the preliminary magnitude at 7.8, which is down from an initial estimate of 8.1.
There is no tsunami threat to NZ from the quake.
A major 7.8-magnitude quake struck off the Fiji coast early on Friday (Sep 7), the United States Geological Survey said, but no tsunami threat was issued.
A very strong quake struck off the coast of Fiji this morning but does not pose a tsunami threat to Hawaii.
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It struck at a depth of 669 kilometers (415 miles). No tsunami warnings were issued.
Pacific Tsunami Warning Centre messages do not represent the official warning status for New Zealand.
In 2016, a devastating 7.8-magnitude natural disaster struck Ecuador's Pacific coast, killing more than 650 people.