An Etymological Dictionary of Astronomy and Astrophysics
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Of or relating to a volcano. Characterized by volcanoes.

→ volcano; → -ic.

The explosive ejection of superheated matter from a → volcano.

→ volcanic; → eruption.

A logarithmic scale, ranging from 1 to 8, used to measure the intensity of volcano eruptions. The VEI is based on several factors: the degree of fragmentation of the volcanic products released by the eruption, the amounts of sulfur-rich gases that form stratospheric aerosols, the volume of the eruptions, their duration, and the height is reached. The largest eruptions (8) produce an amount of bulk volume of ejected → tephra of ~ 1,000 km³.

→ volcanic; → explosivity; → index.

→ vent.

→ volcanic; → vent.