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National Geographic Avalanches 101

Did You Know?

Speed of snow sliding down a slope reaches around 90 Km/hr during a rapid Avalanche.


An avalanche happens when a layer of snow becomes loose and slides downhill. Thousands of avalanches occur every winter in the mountains and are usually triggered by people. Avalanches are caused by these four factors: a steep slope, a snow cover, a weak layer in the snow cover and a trigger such as a snowboarders or skiers.



Facts about Avalanches


Unleash an Avalanche Interactive


National Geographic Encyclopedia



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