Reveal an avalanche

　　One day in February 1999, several skiers downwards along the slope to slide to the snow against their natural and unrestrained, like in the snow flutters the swallow. Suddenly, the sound "click" sound, followed by a mass of snow fog down from behind, quickly buried them. They startled from the narcissism: an avalanche! But everything is too late...

　　Snow fog rolled up rushing forward, they rushed up the snow together along the acceleration ran down the hill, running snow more and more, faster and faster, with the way the forest zone of trying to stop the rush of snow, but almost all the trees and the snow flow desolately broken. After forest belt is some residents housing, residents have no time to leave the house, together with the house be running snow swept away. 4 km along the narrow strip of a mess, trees, villages and farmland, electrical,... There is no escape.

　　The avalanche of up to 250 km per hour, with the energy can achieve a l05 l04 mega joule. If it meets people unfortunately, the impact of the nipples can only be equivalent to 15 tons of run over by a truck on the body.

　　The occurrence of avalanche seems quite by chance, when it occurs, in what place, it is difficult to grasp. It is like a snowflake fall to the ground, or larger voice can trigger an avalanche in the mountain, the Alps are likely to be an avalanche of skiers disturb the peace of the heavy snow, thus caused the sudden disaster.