NOAA / SCIENCE PHOTO LIBRARY NOAA / SCIENCE PHOTO LIBRARY
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West Mata underwater volcano. Sonar map of the West Mata volcano, showing the summit (red) and the base (blue) descending 4000 feet (1.2 kilometres) below the surface of the Pacific Ocean. West Mata was discovered in May 2009 and is the deepest erupting volcano yet discovered. It lies on the seabed in an area bounded by Fiji, Tonga and Samoa.
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