Home > Blossary: Volcano
An article detailing different terms relating to volcanoes and volcanic eruptions.

Category: Geography

19 Terms

Created by: Silentchapel

Number of Blossarys: 95

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It is difficult to distinguish an extinct volcano from a dormant (inactive) one. Volcanoes are often considered to be extinct if there are no written records of its activity. Nevertheless, volcanoes ...

Domain: Natural environment; Category: Volcano

Extinct volcanoes are those that scientists consider unlikely to erupt again, because the volcano no longer has a magma supply. Examples of extinct volcanoes are many volcanoes on the Hawaiian – ...

Domain: Natural environment; Category: Volcano

There is no consensus among volcanologists on how to define an "active" volcano. The lifespan of a volcano can vary from months to several million years, making such a distinction sometimes ...

Domain: Natural environment; Category: Volcano

A pyroclastic flow (also known scientifically as a pyroclastic density current) is a fast-moving current of hot gas and rock (collectively known as tephra), which reaches speeds moving away from a ...

Domain: Natural environment; Category: Volcano

Submarine volcanoes are underwater vents or fissures in the Earth's surface from which magma can erupt. They are estimated to account for 75% of annual magma output. The vast majority are located ...

Domain: Natural environment; Category: Volcano

A supervolcano is any volcano capable of producing a volcanic eruption with an ejecta volume greater than 1,000 km3 (240 cu mi). This is thousands of times larger than normal volcanic eruptions. ...

Domain: Natural environment; Category: Volcano

A lahar is a type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris, and water. The material flows down from a volcano, typically along a river valley. Lahars are ...

Domain: Natural environment; Category: Volcano

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