rock avalanche

geology

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July 16, 2026

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A rock avalanche is a geological phenomenon where a large mass of rock fragments rapidly descends a steep slope. These events are a type of debris avalanche, characterized by their high water content, which allows them to behave similarly to snow avalanches.123

Avalanches, in general, occur when material on a slope breaks loose and quickly gathers more material as it moves downhill. While snow avalanches are common, rock avalanches, ice avalanches, and debris avalanches (containing a mix of materials like stones and soil) also exist. The occurrence of any avalanche depends on factors such as terrain, weather, and the stability of the material on the slope.1

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landslide
Types of landslides
…of rock or debris, forming rock avalanches and debris avalanches, respectively. Entrapped snow and ice may also help mobilize such flows, but the unqualified term avalanche is generally used to refer only to an avalanche of snow. (See avalanche.) Triggered by earthquake shock or torrential rain in mountainous relief with…
Read More
…of rock or debris, forming rock avalanches and debris avalanches, respectively. Entrapped snow and ice may also help mobilize such flows, but the unqualified term avalanche is generally used to refer only to an avalanche of snow. (See avalanche.) Triggered by earthquake shock or torrential rain in mountainous relief with…
Read More