<p>A 7.7-magnitude earthquake struck in the South Pacific on Thursday, the US Geological Survey said, sparking a tsunami warning for New Zealand, Vanuatu, New Caledonia and other nations in the region.</p>.<p>The quake struck at just after midnight on Thursday about 415 kilometres east of Vao in New Caledonia at a depth of 10 kilometres, according to USGS.</p>.<p>"Hazardous tsunami waves from this earthquake are possible within the next three hours," the NWS Pacific Tsunami Warning Center said.</p>.<p>Waves reaching between 0.3 and one metres above the tide level are possible for some coasts of Fiji, New Zealand and Vanuatu, the centre said.</p>.<p>Smaller waves were forecast for other nations in the region including Australia, the Cook Islands and American Samoa.</p>.<p>There were no initial reports of casualties or damage from the quake, which was initially recorded by USGS at magnitude 7.5 before being revised to 7.7.</p>.<p>The Pacific "Ring of Fire", where tectonic plates collide, experiences frequent seismic and volcanic activity.</p>
<p>A 7.7-magnitude earthquake struck in the South Pacific on Thursday, the US Geological Survey said, sparking a tsunami warning for New Zealand, Vanuatu, New Caledonia and other nations in the region.</p>.<p>The quake struck at just after midnight on Thursday about 415 kilometres east of Vao in New Caledonia at a depth of 10 kilometres, according to USGS.</p>.<p>"Hazardous tsunami waves from this earthquake are possible within the next three hours," the NWS Pacific Tsunami Warning Center said.</p>.<p>Waves reaching between 0.3 and one metres above the tide level are possible for some coasts of Fiji, New Zealand and Vanuatu, the centre said.</p>.<p>Smaller waves were forecast for other nations in the region including Australia, the Cook Islands and American Samoa.</p>.<p>There were no initial reports of casualties or damage from the quake, which was initially recorded by USGS at magnitude 7.5 before being revised to 7.7.</p>.<p>The Pacific "Ring of Fire", where tectonic plates collide, experiences frequent seismic and volcanic activity.</p>