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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.
Volcanic eruptions that rated 5 on the volcanic explosivity index. Such eruptions release a tephra volume of at least 1 km 3 (0.24 cu mi) with immediate exceptional effects on the surrounding area. For smaller volcanic eruptions that have produced at least 0.1 km 3 (0.024 cu mi) of tephra at a time, see Category:VEI-4 eruptions.
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Supervolcano – Volcano that has had an eruption with a volcanic explosivity index (VEI) of 8; Trans-Mexican Volcanic Belt – Active volcanic belt that covers central-southern Mexico; Volcanic arc – Chain of volcanoes formed above a subducting plate; Volcanic explosivity index – Predictive Qualitative scale for explosiveness of volcanic ...
This is a list of volcanic eruptions in the 21st century with a volcanic explosivity index (VEI) of 4 or higher, and smaller eruptions that resulted in fatalities, significant damage or disruptions. The largest volcanic eruption of the 21st century is the 2022 Hunga Tonga–Hunga Haʻapai eruption and tsunami , and the deadliest are the 2018 ...
Satellite images of the 15 January 2022 eruption of Hunga Tonga-Hunga Haʻapai. This is a list of volcanoes that have had large explosive eruptions during the Holocene (since about 11,650 years Before Present), with a volcanic explosivity index (VEI) of 5 or higher, or a plume height of at least 30 km.
Taupō Volcanic Zone, Maroa Caldera (size: 16 x 25 km), New Zealand: 230 ka: 140 km 3 (33.6 cu mi) of tephra. [1] Taupō Volcanic Zone, Reporoa Caldera (size: 10 x 15 km), New Zealand: 230 ka: 7: around 100 km 3 (24.0 cu mi) of tephra [2] Taupō Volcanic Zone, Whakamaru Caldera (size: 30 x 40 km), North Island, New Zealand: around 254 ka: 8
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.