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  Seafloor volcanoes surprise

Volcanoes on the seafloor can grow or collapse tens of metres in just a few days, a new study has found, suggesting that that the seabed is much more unstable than previously thought.
Researchers, led by Professor Tony Watts of Oxford University's Department of Earth Sciences, report in Nature Geoscience how they surveyed the topography of the active Monowai volcano, a submarine volcano on the southwest Pacific Ocean floor near Tonga, in May and June 2011.

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  Rise and fall of underwater volcano revealed

The violent rise and collapse of an underwater volcano in the Pacific Ocean is captured in startling clarity for the first time.
Researchers studying the Monowai volcano, near Tonga, recorded huge changes in height in just two weeks.

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