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What is an Avalanche?

Types of Avalanches
How Do Avalanches Form?
How Do Avalanches Start?
Avalanche Sizes
Avalanche Formation Quiz

Where Do Avalanches Happen?

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The Avalanche Forecast

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The Daily Process

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Backcountry Resources

What is an Avalanche?

Avalanche Formation Quiz

You've completed the section on avalanche formation. Let's see what you've learned.

Question 1

Questionnaire

Slab avalanches are:

The most dangerous to people

A slab of cohesive snow sliding on a weakness in the snowpack.

Able to move downhill at up to 130 km/h.

All of the above

Question 2

Questionnaire

Which of these describes a size three avalanche?

It is relatively harmless to people.

It can bury a car, destroy a small building, or break trees.

It could destroy a small village.

Question 3

From left: A picture of a thermometer reading -0.6 celsius, explosives avalanche control, and a snowmobiler riding on a slope. — Avalanche Canada/Marmot Basin/Avalanche Canada

Questionnaire

Which of the following is a natural trigger for an avalanche?

Rapidly rising temperatures to near or above 0° C

A ski patroller conducting avalanche control with explosives.

Someone riding a snowmobile.

Avalanche Sizes Where Do Avalanches Happen?

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