By Jim Le Maistre
300 kilometers off the coast of Oregon there is an undersea volcano, The Axial Seamount. It erupted in 1982, 1998, 2011 and 2015. New Scientist July 9 th , 2007 suggests that there are roughly 3 million volcanoes under the oceans of the world, this one is the only under sea volcano ever, regularly, studied. It is estimated that about 80 % of all volcanic activity on Earth occurs under the oceans. Almost nothing is known about these volcanoes. Scientists do not even have a scale by which to measure volcanoes that erupt under the sea. No system has ever been developed to describe or rate their magnitude like the systems rating Volcanoes above land.
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