Avalanches And Landslides

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Avalanches and Landslides

OUTLINE

1. a.WHAT IS AN AVALANCHE OR LANDSLIDE?

b.EXACTLY HOW DOES AN AVALANCHES OCCUR

2. a.I TALK A LITTLE ABOUT PAST AVALANCHES

b.PAST DEATHS FROM AVALANCHES

3. a.CONCLUSION CLOSING OF MY REPORT

What is an avalanche? , well it's a large mass of snow and ice or of earth or

rock sliding down a mountain side or a cliff. And how does an avalanche occur,

well mainly they happen by vibrations caused by movement of the earth such as an

earthquake, gunfire, rainy weather, and many more.

Now I would like to talk a little about past avalanches and landslides that have

occurred like the 1903 Frank landslide and avalanche that happened at the same

time, in Alberta Canada it destroyed the parks canyons it's beautiful trees'

it's wonderful sights and killed nearly one hundred people, and covered a small

town near Alberta with ice and snow.

Another devastating avalanche incident is the 1964 Sherman slide, in which a

huge avalanche was triggered by the 1964 Alaskan earthquake. The slide spilled

out onto the Sherman glacier, during the big slide several other smaller slides

happened and those were the one that took lives in Anchorage, and destroyed

property

There are a couple of types of avalanches and how the destroy so much this one

is named "Loose Snow Avalanches"1, it starts' in a small area then grows in size

and mass as it descends.Another type is the "Slab Avalanche" it actually starts

in a large area of ice and snow and then begins to slide.

On September 12 of 1717 crusaded down the Troilet, Italy glacier, gaining speed

on a cushion of air reaching a falling velocity of km/hr over a 3600 m fall.

Two towns were destroyed, with seven people killed and a 120 cows lost. The

slosh of an avalanche ran up the far side of the valley at a speed of 125 km/hr.

In developed areas such as ski resorts it is possible to predict avalanches

because they are controlled with explosives and artillery. In a back-country

areas it is possible to predict avalanches because the forecast relies on

experience of the person making the observation. There are no computer models

available to predict avalanches and therefore predictions are only accomplished

by repetitive observations and knowledge of snow properties.

Due to difficulty in reliable predictions method areas of avalanche hazards must

rely on controlling or altering the effects of an avalanche.

The back country explorer must be highly skilled in determining safe routes and

rescue procedures over and above relying on predictions of avalanches for

personal safety.

Avalanches kill people many ways but the most common cause of death is

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