3. Avalanches
An avalanche is the rapid gravitational movement of a mass of snow down a slope, caused by a break in the snowpack. Its main characteristics are the mass of snow mobilized and the speed of propagation. Avalanche triggering depends essentially on :
the slope ;
thickness ;
the mechanical characteristics of the snowpack.
3.1 Snowy coat
Snow cover is formed by the accumulation of snow on the ground. It is a heterogeneous material, made up of a succession of strata corresponding to successive snowfalls, which evolve until they melt
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Avalanches
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