volcanic explosivity index

(VEI)
   a measure of the severity of a volcanic eruption. The VEI scale is from 0 to 8; an index value of v corresponds to an output of at least 103+v cubic meters of magma. The Mt. St. Helens eruption of 1980 was a 5 on this scale, and the largest eruption of historic times (the Tambora eruption of 1815) rated a 7. A table is provided.

Dictionary of units of measurement. 2015.

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  • Volcanic Explosivity Index — USGS PHOTO GLOSSARY OF VOLCANIC TERMS The Volcanic Explosivity Index, or VEI, was proposed in 1982 as a way to describe the relative size or magnitude of explosive volcanic eruptions. It is a 0 to 8 index of increasing explosivity. Each increase… …   Glossary of volcanic terms

  • Volcanic Explosivity Index — Der Vulkanexplosivitätsindex (Abkürzung VEI, engl. Volcanic Explosivity Index) ist eine logarithmische Skala von 0 bis 8 zur Angabe der Stärke eines Vulkanausbruchs, vergleichbar mit der Richterskala für Erdbeben. Messgrößen sind die Menge an… …   Deutsch Wikipedia

  • Volcanic Explosivity Index — The Volcanic Explosivity Index (VEI) was devised by Chris Newhall of the U.S. Geological Survey and Steve Self at the University of Hawaiokinai in 1982 to provide a relative measure of the explosiveness of volcanic eruptions. Volume of products,… …   Wikipedia

  • vEI index — GLOSSARY OF VOLCANIC TERMS The Volcanic Explosivity Index, which is a measure of the size of an eruption based on its magnitude, intensity and destructive power. The VEI is measured on an eight point scale, where 8 is the most destructive and… …   Glossary of volcanic terms

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  • VEI — USGS PHOTO GLOSSARY OF VOLCANIC TERMS See: Volcanic Explosivity Index …   Glossary of volcanic terms

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