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A supervolcano is a volcano that has had an eruption with a volcanic explosivity index (VEI) of 8, [1] the largest recorded value on the index. This means the volume of deposits for such an eruption is greater than 1,000 cubic kilometers (240 cubic miles).
The Lava Creek eruption of the Yellowstone Caldera, which occurred 640,000 years ago, [31] ejected approximately 1,000 cubic kilometres (240 cu mi) of rock, dust and volcanic ash into the atmosphere. [3] It was Yellowstone's third and most recent caldera-forming eruption.
A supervolcano is defined as a volcano that has experienced one or more eruptions that produced over 1,000 cubic kilometres (240 cu mi) of volcanic deposits in a single explosive event. [34] Such eruptions occur when a very large magma chamber full of gas-rich, silicic magma is emptied in a catastrophic caldera-forming eruption.
A cubic mile (abbreviation: cu mi or mi 3 [1]) is an imperial and US customary (non-SI non-metric) unit of volume, used in the United States, Canada and the United Kingdom. It is defined as the volume of a cube with sides of 1 mile (1.6 km ) length, giving a volume of 1 cubic mile (4.2 km 3 ).
In 1960, the Aral Sea was the world's twelfth-largest known lake by volume, at 1,100 km 3 (260 cu mi). However, by 2007 it had shrunk to 10% of its original volume and was divided into three lakes, none of which are large enough to appear on this list.
1,000 [40] Cerro Galán: 2.2 Catamarca Province, Argentina 1,000 Elliptical caldera is ~35 km wide [41] Paintbrush tuff (Tiva Canyon Member) 12.7 Southwestern Nevada 1,000 Related to a 1200 cubic km tuff (Topopah Spring Member) as another member in the Paintbrush tuff [35] San Juan—Sapinero Mesa Tuff 28 San Juan volcanic field: 1,000
Sam Ignimbrite in Yemen forms 29.5 million years ago, at least 5,550 cubic kilometers (1,332 cu mi) of distal tuffs associated with the ignimbrites. [88] Jabal Kura’a Ignimbrite in Yemen forms 29.6million years ago, at least 3,700 cubic kilometers (888 cu mi) of distal tuffs associated with the ignimbrites. [88]
A length of 100 kilometers (about 62 miles), as a rough amount, is relatively common in measurements on Earth and for some astronomical objects. It is the altitude at which the FAI defines spaceflight to begin. To help compare orders of magnitude, this section lists lengths between 100 and 1,000 kilometers (10 5 and 10 6 meters).