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Volcano's Deadly Warning

Anatomy of a Volcano

 

Intro | Ash | Lava flow | Lava dome | Lava | Vent | Tephra | Caldera |  Lahar  | Fissure | Dike | Magma

Volcano's Deadly Warning homepage

Lahar
Diagram of a volcano

Lahar
Lahar is an Indonesian word for a rapidly flowing mixture of rock debris and water that originates on the slopes of a volcano. Lahars are also referred to as volcanic mudflows or debris flows. They form in a variety of ways, chiefly from the rapid melting of snow and ice by pyroclastic flows, intense rainfall on loose volcanic rock deposits, the breakout of a lake dammed by volcanic deposits, and as a consequence of debris avalanches.

Left: A lahar from the Unzen Volcano eruption in Kyushu, Japan tore through this street in Shimabara, destroying cars and homes in the process.

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