Pyroclastic flow

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Notion

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Science and technology

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What Wikipedia says

A pyroclastic flow, more broadly known as a pyroclastic density current, is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano. Pyroclastic currents travel at extremely high speeds and have extremely high temperatures.

Excerpt from the Wikipedia article “Pyroclastic flow”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Austin Post, Public domain, via Wikimedia Commons.