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  1. Avalanche | Definition, Causes, & Facts | Britannica

    • An avalanche is a mass of material rapidly moving down a slope. It is typically triggered when the material on a slope breaks loose from its surroundings, and this material quickly collects and carries addition… See more

    Avalanche conditions

    The occurrence of an avalanche depends on the interaction of mountainous terrain, … See more

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    Prediction and protective measures

    In order to reduce fatalities and to protect villages and roads, people attempt to predict and prevent avalanches. Accurate avalanche prediction requires an experience… See more

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  2. Avalanches are caused by various factors, including12345:
    • Material on a slope breaking loose from its surroundings.
    • Increased load due to snowfall and/or erosion during storms.
    • Metamorphic changes in the snowpack, such as melting due to solar radiation.
    • Rain, earthquakes, rockfall, and icefall.
    • Weakened snowpack foundation due to rain or melting.
    • Heavy snowfall and high winds.
    Learn more:
    An avalanche is typically triggered when material on a slope breaks loose from its surroundings; this material then quickly collects and carries additional material down the slope.
    www.britannica.com/science/avalanche
    Most avalanches occur spontaneously during storms under increased load due to snowfall and/or erosion. Metamorphic changes in the snowpack, such as melting due to solar radiation, is the second-largest cause of natural avalanches. Other natural causes include rain, earthquakes, rockfall, and icefall.
    en.wikipedia.org/wiki/Avalanche
    Avalanches begin when a mass of material overcomes the frictional resistance of the sloping surface, often after the material’s foundation has been weakened by rains or the snow has been partially melted by a warm, dry wind. Other weather conditions that can lead to avalanches are heavy snowfall and high winds.
    www.britannica.com/summary/avalanche
    To get an avalanche, you need a surface bed of snow, a weaker layer that can collapse, and an overlaying snow slab. The highest risk period is during and immediately after a snow storm. Underlying snowpack, overloaded by a quick deluge of snow, can cause a weak layer beneath the slab to fracture naturally.
    www.nationalgeographic.com/environment/article/a…
    A snow avalanche begins when an unstable mass of snow breaks away from a slope. The snow picks up speed as it moves downhill, producing a river of snow and a cloud of icy particles that rises high into the air. The moving mass picks up even more snow as it rushes downhill.
    education.nationalgeographic.org/resource/avalanc…
     
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