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  4. _c_e0a3b798
experimental

Entrée : Echelle VEI

URI: https://terra-vocabulary.org/ncl/DataTerraRepositoryFairIncubator/motsClefs/c_e0a3b798

Indice d'explosivité volcanique

Métadonnées principales

est un Sensor | Concept
modifié le 17 Nov 2023 08:31:48.911
soumis parElsa David
accepté le 17 Aug 2022 09:07:12.495

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date accepted 17 Aug 2022 09:07:12.495
date submitted 17 Aug 2022 08:04:10.641
definition
entity Echelle VEI
source graph graph

description
fr Indice d'explosivité volcanique
en First proposed by Newhall and Self (1982), a now widely used, open-ended semi-quantitative classification scheme - based principally on the height of the eruption column and the erupted volume of tephra - to describe the size of explosive eruptions. The largest historical eruption (Tambora, Indonesia, in 1815) is assigned a VEI = 7; for comparison, the 18 May 1980 eruption of Mount St. Helens was ranked as VEI = 5. However, much larger explosive eruptions in the geologic past (e.g., voluminous caldera-forming events at Yellowstone volcanic system, Wyoming) can be assigned VEI = 8. Non- explosive eruptions are VEI = 0, regardless of size. As with earthquakes, small to moderate-size explosive volcanic events (< VEI = 5) occur much more frequently than large events (> VEI = 5); Simkin and Siebert (1994) have assigned VEI estimates for all the world’s known eruptions during the last 10,000 years. In terms of the energy involved, the energy of the 1980 Mount St. Helens (VEI = 5) eruption...
item class Sensor | Concept
label
fr Echelle VEI
en Volcanic Explosivity Index
modified 17 Nov 2023 08:31:48.911
notation c_e0a3b798
register mots clefs
status status experimental
submitter
account name edavid@ipgp.fr
name Elsa David

type register item
version info 6
Chargement...
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Définition

alt label VEI
description
fr Indice d'explosivité volcanique
en First proposed by Newhall and Self (1982), a now widely used, open-ended semi-quantitative classification scheme - based principally on the height of the eruption column and the erupted volume of tephra - to describe the size of explosive eruptions. The largest historical eruption (Tambora, Indonesia, in 1815) is assigned a VEI = 7; for comparison, the 18 May 1980 eruption of Mount St. Helens was ranked as VEI = 5. However, much larger explosive eruptions in the geologic past (e.g., voluminous caldera-forming events at Yellowstone volcanic system, Wyoming) can be assigned VEI = 8. Non- explosive eruptions are VEI = 0, regardless of size. As with earthquakes, small to moderate-size explosive volcanic events (< VEI = 5) occur much more frequently than large events (> VEI = 5); Simkin and Siebert (1994) have assigned VEI estimates for all the world’s known eruptions during the last 10,000 years. In terms of the energy involved, the energy of the 1980 Mount St. Helens (VEI = 5) eruption...
exact match c bf946f9e
in scheme Vocabulaire des mots clefs
label
fr Echelle VEI
en Volcanic Explosivity Index
pref label
fr Echelle VEI
en Volcanic Explosivity Index
same as c bf946f9e
source GFZ
top concept of Vocabulaire des mots clefs
type Sensor | Concept
was attributed to Pôle FormaTerre