The service warned that "hazardous tsunami waves" were possible for some coasts, particularly Australia, some 2000 miles distant.
"Tsunami waves reaching 0.3 [0.9 feet] to 1 meters [3.2 feet] above the tide level are possible for some coasts of New Caledonia. Tsunami waves are forecast to be less than 0.3 meters above the tide level for the coasts of Vanuatu," the USGS said.
There are no reports of damages or casualties.
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