SYDNEY, July 17 (Reuters) - An undersea earthquake with a magnitude of 6.1 struck off the South Pacific island nation of Tonga on Monday, the U.S. Geological Survey said.
The quake, at a depth of 97 km (60 miles), was located 180 km (112 miles) south-southwest of Neita in Tonga.
No tsunami warning was issued and there were no immediate reports of damage or casualties from the quake. (Reporting by Michael Perry; Editing by Paul Tait)
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