Layers of snow build up and slide down the mountain A vibration or movement like the voice of a person or a train can start and avalanche Certain weather conditions like wind and rain A rock or a piece of ice can shake the snow to slide down the mountain Water under the snow could make the snow slide A section of the snow could fall down or break apart and slide down the mountain.
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Avalanches are made up of flowing snow. They are distinct from mudslides, rockslides and serac collapses on an icefall.
ReplyDeletehttp://en.wikipedia.org/wiki/Avalanche
weather can also cause avalenches. like the sun can make water under the snow. and make an avelanch.
ReplyDeleteAvalanches are more likely to occur after a heavy snowstorm. then 24 hours following a storm are the most critical. Recent snowfalls puts extra stress on the exsisting snow pack, especially if the new snow does not adequatey bond with the layer of snow already there . snowfall amounts of one foot or more create the most hazardous situation producing avalanches there are large enough toblock highways and causes major destruction.
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