11 January 2018 - Undersea volcanic eruption near New Zealand was largest in 100 years
World's biggest deep-sea volcanic eruption in 100 years 'a scientific goldmine'
(The Sydney Morning Herald, 11/01/2018)
The world's largest deep-ocean volcanic eruption in the past century, which occurred near New Zealand, is a scientific goldmine, researchers say.
The volcano, named Havre, 1000 kilometres north-west of the country's North Island, was discovered in 2002.
"We know virtually nothing about submarine volcanoes and eruption processes in the ocean, despite more than 75 percent of the Earth’s volcanoes being on the seafloor," lead author Rebecca Carey, a volcanologist at the University of Tasmania in Australia, wrote in an email to Newsweek.
Carey was focused on the more usual volcanic suspects—eruptions that take place on land—until (coincidentally) just before the eruption began. "Lucky for me, in 2012 Havre volcano erupted," Carey wrote. Havre, which had been discovered about 600 miles from New Zealand's North Island just a decade earlier, sent a plume from 700 meters below sea level to the surface.
Jamie Morton (New Zealand Herald, 11/01/2018)
In a just-published study, researchers have pieced together the 2012 eruption of the seafloor Havre volcano, which lies in the Kermadec Islands, about 1000km off the North Island.
The 2012 blow - the largest deep-ocean eruption of the past century - was revealed when satellite imagery picked up a pumice raft spread across some 400sq km of ocean.
New Zealand Volcanoes
(Radio New Zealand, 11/01/2018)
In 2012, 1000km off the coast of the North Island near Raoul Island in the Kermadec chain, a massive volcanic eruption spewed ash and rock into the deep ocean.
The region, the Tonga-Kermadec arc, is one of the most active in the world for submarine eruptions. A chain of underwater volcanoes runs south to north along the Kermadec trench to Tonga and has at least 30 volcanoes. Most of the volcanoes of the Kermadec region are comparable in size to Ruapehu and Taranaki.