Rise and fall of an underwater volcano revealed - see paper in Nature Geoscience

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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. The images, gathered by sonar from a research ship, shed new light on the turbulent fate of submarine mountains.

"Rapid rates of growth and collapse of  Monowai submarine volcano in the Kermadec Arc" by Watts etal. can be read on Advance Online Publication (AOP) on Nature Geoscience's 
website.