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Definition of Supervolcano

Supervolcano Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
A supervolcano is any volcano capable of producing a volcanic eruption with an ejecta volume greater than . This is thousands of times larger than normal volcanic eruptions. Supervolcanoes can occur either when magma in the mantle rises into the crust from a hotspot but is unable to break through the crust, thus pressure builds in a large and growing magma pool until the crust is unable to contain the pressure (this is the case for the Yellowstone Caldera), but they can also form at convergent plate boundaries (for example, Toba).

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