The VEI combines total volume of explosive products, eruptive cloud height, and other descriptive measures of eruption. 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. Read More. Witness the VEI 8 super eruption of any VEI 8 super volcano. In the early 2000s, the term “supereruption” began being used as a catchy way to describe VEI 8 eruptions. 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. 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. The Yellowstone volcano spewed an estimated 1,000 cubic kilometers (240 cubic miles) of material. But we shouldn’t forget volcanoes in the Cascades Range, as well. 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. True flood basalts are VEI 8 effusive basaltic eruptions 1000 km3 or much more, and not at all acossiated with calderas, because they feed from very deep, not a shalllow chamber. These flows can reach lengths of 2000 kilometers during extreme chases during severe LIP events. 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. An eruption is classified as a VEI 8 if the measured volume of deposits is greater than 1,000 cubic kilometers (240 cubic miles). Report Item Close. 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. Roblox is a global platform that brings people together through play. Ash deposits from the Yellowstone’s last volcanic eruption can still be found as far away from Yellowstone Iowa, Louisiana, and California. Volcanoes that have produced explosive VEI-8 eruptions, often called supervolcanoes in the media. Read More. Earth can outclass the biggest nuclear bombs with volcanoes of unprecedented scale. 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