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The volcanic explosivity index (VEI) is a scale used to measure the size of explosive volcanic eruptions. It was devised by Christopher G. Newhall of the United States Geological Survey and Stephen Self in 1982.
This article is a list of historical volcanic eruptions of approximately magnitude 6 or more on the Volcanic Explosivity Index (VEI) or equivalent sulfur dioxide emission during the Holocene, and Pleistocene eruptions of the Decade Volcanoes (Avachinsky–Koryaksky, Kamchatka; Colima, Trans-Mexican Volcanic Belt; Mount Etna, Sicily; Galeras ...
The volcanic explosivity index (commonly shortened to VEI) is a scale, from 0 to 8, for measuring the strength of eruptions but does not capture all of the properties that may be perceived to be important. It is used by the Smithsonian Institution's Global Volcanism Program in assessing the impact of historic and prehistoric lava flows.
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Volcanic eruptions that rated 6 on the volcanic explosivity index.Such eruptions release a tephra volume of at least 10 km 3 (2.4 cu mi) with profound long-term effects on the surrounding area and noticeable short-term effects on global climate.
In the criteria of Volcanic Explosivity Index, recognizing an eruption as ultra-Plinian would make it at least VEI-5 or higher. [ 9 ] The threshold for ultra-Plinian eruptions is defined by an eruptive column height of 45 km (28 mi), [ 10 ] or 41 km (25 mi) more recently. [ 11 ]
Volcanic eruptions that rated 3 on the volcanic explosivity index. Such eruptions release a tephra volume of at least 0.01 km 3 (0.0024 cu mi) with noticeable effects on the surrounding area. For smaller volcanic eruptions that have produced at least 0.01 km 3 (0.0024 cu mi) of tephra at a time, see Category:VEI-2 eruptions.
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