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WELLINGTON, NEW ZEALAND - A 5.7-MAGNITUDE earthquake struck off the main Pacific island nation of Tonga on Thursday, seismologists said.
The quake hit at 8.38am (4.38am Singapore time) 475 kilometres west-southwest of the capital Nuku'Alofa, the US Geological Survey said.
It was registered at a depth of 581 kilometres.
No tsunami warning was immediately issued. -- AFP
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