In the early 2000s, the term “supereruption” began being used as a catchy way to describe VEI 8 eruptions. Earth can outclass the biggest nuclear bombs with volcanoes of unprecedented scale. The Yellowstone volcano spewed an estimated 1,000 cubic kilometers (240 cubic miles) of material. An eruption is classified as a VEI 8 if the measured volume of deposits is greater than 1,000 cubic kilometers (240 cubic miles). Did You Know? All VEI 8 eruptions occurred tens of thousands to millions of years ago making the volume of ejecta or deposits the best method for classification. Witness the VEI 8 super eruption of any VEI 8 super volcano. Read More. The eruption was retroactively classified as a level 8 on the Volcano Explosivity Index (VEI). Volcanoes that have produced explosive VEI-8 eruptions, often called supervolcanoes in the media. Report Item Close. But we shouldn’t forget volcanoes in the Cascades Range, as well. The Volcanic Explosivity Index (VEI) is a relative measure of the explosiveness of volcanic eruptions.It was devised by Chris Newhall of the United States Geological Survey and Stephen Self at the University of Hawaii in 1982.. Volume of products, eruption cloud height, and qualitative observations (using terms ranging from "gentle" to "mega-colossal") are used to determine the explosivity value. In this 4th episode, we compare the scale, power and size of several infamous volcanoes and how they compare in size to others. Ash deposits from the Yellowstone’s last volcanic eruption can still be found as far away from Yellowstone Iowa, Louisiana, and California. The term "supervolcano" implies a volcanic center that has had an eruption of magnitude 8 on the Volcano Explosivity Index (VEI), meaning that at one point in time it erupted more than 1,000 cubic kilometers (240 cubic miles) of material. They include Taupo in New Zealand, site of the world’s last VEI-8 eruption 26,500 years ago and Iran’s Mount Damavand, which lies just 50 kilometres from Tehran. These flows can reach lengths of 2000 kilometers during extreme chases during severe LIP events. As examples,the 1570 effusive eruption of Masaya (Nicaragua) was a VEI 0 event, the 1980 eruption of Mount St.Helens was a VEI 5, and the Pleistocene Lava Creek Tuff eruption of Yellowstone Calderas was a VEI 8. These include the Taupo Volcano in New Zealand, which produced an enormous VEI 8 eruption around 26,500 years ago, and the Campi Flegrei calderas along the Bay of Naples in Italy. Read More. The researchers already have a long list of candidate volcanoes that might be capable of a VEI-7 blast. It was so large, in fact, that in a 2004 report in the Bulletin of Volcanology, scientists recommended adding a ninth level to the VEI scale, and declared the La Garita eruption a magnitude 9.2. 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