Causes Terrain Safety Types of Avalanches Miscellaneous
100
37-39 degrees
What is the most common angle for avalanches?
100
Any feature that increases consequences in an avalanche.
What is a terrain trap?
100
Probe, transceiver and shovel.
What are 3 important pieces of equipment to bring in the back country?
100
Slab, wet and dry
What are the 3 types of avalanches?
100
Mount St. Helens explosion.
What was the worlds fastest avalanche?
200
Snow can fracture when the strength of the bonds that hold it together are overcome by stress that overloads the bonds.
What is the definition of a trigger?
200
Trees, cliffs, gullies, ice fall, canyon, crevasses.
What are 3 common terrain traps?
200
Arms and legs
What is the most common fracture in an avalanche?
200
When a slab underneath begins to slide, taking the top with it
How does a Slab avalanche start?
200
Both were in Peru
Where has the two most deadly avalanches occurred?
300
In the trees
What is the best area to ski/snowboard in to avoid avalanches?
300
Crevasses.
What is the worst kind of terrain traps?
300
If your covered, spit to figure out which way is up.
What is the spit test?
300
Slab
What is the most dangerous avalanche?
300
Within 24 hours of a rapid, heavy snowfall.
When do most avalanches occur?
400
Weather, snowfall, temperature, wind direction, snow pack conditions, slope angle, slope orientation and terrain
What are 3 major causes of avalanches?
400
A route that isnt to steep and without terrain traps.
What is the best route to take?
400
Between 200 and 500$
How much to transceivers cost? (Between)
400
When a small amount of snow begins to slide, it gradually brings more with it.
How does a point release start?
400
Approximately 150
How many people die a year from avalanches? Approximately.
500
Walking
What is the most common form of travel that causes avalanches?
500
92% at 15 min and 30-35% at 30 min
What are survival times?
500
Stand fingertip to fingertip and probe left, center and then right, then move forward
What iz the most efficient way to probe in a small group?
500
Sound does not cause avalanches.
What is a common misconception about avalanches?
500
Force of the avalanche or asphyxiation from the snow.
What makes an avalanche so deadly?






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