avalanche

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Nuclear medicine Avalanche ionization
Wilderness medicine A natural disaster in which massive unsorted mixtures of snow/ice/rock/mud cascade down a steep incline. Powder snow avalanches can exceed speeds of 300 km/h, and masses of 10,000,000 tonnes
Statistics Europe, 150 deaths/year; USA/Canada, 15/year; most are recreational—e.g., snowmobilers, mountaineers, back-country skiers
Avalanche risks Decreased snow stability; slope angles > 35º
Emergency action Do not wait; even in well-equipped ski areas, helicopters take 45 minute to arrive
Survival 15 minutes—85%; 30 minutes—40%; 1 hour—20%; 2 hours—0%
Cause of death Crush injury, hypothermia, suffocation

avalanche

Geomedicine A natural disaster in which a massive block of snow cascades down a steep incline Statistics In North America, ± 15 die thereof/yr; in Europe, 150/yr; most are recreational deaths–eg, snowmobilers, mountaineers, backcountry skiers Avalanche risks ↓ Snow stability; slope angles > 35º COD Crush injury, asphyxia. See Geological disaster.
References in periodicals archive ?
An avalanche in the disputed Kashmir region that hit a military camp near the Siachen glacier in the Karakoram branch of the Himalaya mountains in Pakistan has buried over a hundred troops.
According to Amiri, 28 people were killed and 64 others injured due to avalanches in the province over the past week.
Adams himself knows a little about starting avalanches. Before the research center was built, he and his crew would study avalanches by triggering explosives while they waited in a shack right in a snow slide's path.
VANCOUVER, March 14, 2010 (TAP) - Three people are dead and others feared buried in snow after an avalanche struck a snowmobile competition near Revelstoke, British Columbia, police said on Sunday.
According to Valais police reports, six people have been referred to the cantonal prosecutor after allegedly setting off avalanches that swept onto official pistes in Anzere and Zermatt, risking the lives of people skiing there.
Ogwen Valley team spokesman Chris Lloyd repeated warnings about unstable snow likely to cause avalanches and urged walkers to be careful if visiting the region this weekend.
The avalanches all took place within a matter of hours and followed a warning from experts.
An average of 27 people are killed in avalanches in the Swiss Alps every
Slab avalanches are the most common and most dangerous because a slab of snow breaks loose and cascades to the slope's bottom.
Helicopters were also surveying other roads that had been cut off to determine which ones could be cleared without risking the workers being trapped in new avalanches.
Some forest openings may involve the runout zones of infrequent avalanches. Many options to reduce or eliminate exposure.