2. Large mass of rock
debris or snow that
moves rapidly down
a mountain slope,
sweeping and
grinding everything
in its path.
3. An avalanche begins when a mass of material overcomes
frictional resistance of the sloping surface, often after its
foundation is loosened by spring rains or is rapidly melted by
warm, dry wind. Vibrations caused by loud noises, such as
thunder, or blasting can create an avalanche.
Avalanches usually occur in February, March, and January.
They can also occur in April.
4.
5. There are three different types of avalanches…..
1. A dry snow avalanche consists of powdery snow and air
that can move faster than 100 MPH.
2. A wet snow avalanche is a mass of partially melted snow that
moves slower than a dry snow avalanche.
3. A slab avalanche is when a portion of snow breaks loose as
a slab and splits into pieces as it slides.
6.
7.
8.
9.
10.
11. Avalanches can occur anywhere
in the world.
They occur where ever there is
a high snow covered mountain.
Avalanches can also occur near
plate boundaries. Usually at
convergent plate boundaries.
12.
13.
14. Avalanches don’t do a lot of damage to
cities or towns because they are up in
the high mountains . Avalanches burry
mountain side homes and destroy
forests. They also take down radio
towers and lodges that are in its path.
Avalanches also take away people’s
lives, especially skiers who are taking
a trip down the mountain.
15. Jammu & Kashmir: 11
killed in avalanches,
houses collapse on
12 march 2014.
16.
17.
18. Deaths From Avalanches
Avalanches cause a fair amount of deaths when they
occur. They are so hard to predict and because of that
people never know when they are going to happen.
That is why it is best to never go onto a mountain
alone.
19. To prevent avalanches they build up snow fences to
prevent buildup of snow in the starting-zones.
Also defecting walls are built up to divert avalanche
flows away from buildings and even entire towns.
Sheds are also build across roadways that pass
through persistent avalanche paths and they can help
to protect motorists from avalanches.
Slopes with trees help to prevent avalanches as well.
They use explosives to set off small avalanches in areas
that are of potential danger. This is to reduce the size
of future avalanches in the risk area.
20.
21. Snow Shield's Copper Armor Panel Snow Guard demonstrating
snow retention on a copper roof.
24. Research is done to find out about the mechanisms that
govern the build-up of snow - wind and precipitation -
instability within the snow cover, and the flow of
avalanches.
The main objective of this research is to improve zoning
and make defences more effective and more reliable.
