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2017-06-26. New Volcanic Island Unveils Explosive Past.

posted Jul 6, 2017, 9:09 AM by Alan Gould
By Shane J. Cronin, Marco Brenna, Ian E. M. Smith, Simon Barker, Manuela Tost, Murray Ford, Sisi Tonga’onevai, Taaniela Kula, and Rennie Vaiomounga, Earth & Space Science News (EoS, AGU). For GSS Energy Flow chapter 2. Excerpt: In late December 2014, an undersea volcano erupted between two small islands in the Tonga volcanic arc northeast of New Zealand, sending steam and dense ash plumes high into the air. By the time the eruption ended about 5 weeks later, a new island had formed, eventually bridging the gap between the original islands. Winds and ocean waves then began rapidly reshaping the newly emerged volcanic cone. Ten months after the eruption, we visited the new island, which we unofficially nicknamed Hunga Island. There, we attempted to characterize the volcanology of the eruption, begin tracking the rate of erosion on the new island, and assemble a history of volcanism in this region of the southwest Pacific. Our findings reveal a shallow submarine volcanic caldera adjacent to the new volcanic island, and they highlight how incomplete the volcanic record can be at remote oceanic volcanoes.... https://eos.org/project-updates/new-volcanic-island-unveils-explosive-past