'Massive' Kermadec volcanic eruption rivalled Mt St Helensby RNZ
The eruption originated at the little-known La Havre volcano and spewed ash and rock into the deep ocean north of New Zealand.
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.
A huge 400 square kilometre raft of pumice was detected floating in the ocean near New Zealand, indicating a submarine eruption.
By analysing satellite imagery scientists eventually agreed the eruption originated at the little-known Le Havre volcano.
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