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Which volcanic hazard is a dense, fast‑moving mixture of... | QuestionStock

Representative image for question: Which volcanic hazard is a dense, fast‑moving mixture of hot gas and volcanic ash and rock that races down volcano slopes?

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Which volcanic hazard is a dense, fast‑moving mixture of hot gas and volcanic ash and rock that races down volcano slopes?

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Which volcanic hazard is a dense, fast‑moving mixture of hot gas and volcanic ash and rock that races down volcano slopes?

Options:

Pyroclastic flow
Lahar
Tephra fall
Lava flow

Correct answer: Pyroclastic flow

Explanation: A pyroclastic flow is a ground‑hugging mixture of hot gas and tephra; these flows can exceed 700°C and travel faster than 100 km/h, causing extreme destruction near eruptions.

Created 2026-03-10T17:14:53.392Z. Updated 2026-03-10T17:14:53.392Z.