[DOC] [TLE] National Park Geology Avalanche Hazards - Explore Nature [PAR] Jun 14, 2007 ... Definition: A flow of snow, ice, rock, and other material that occurs as a result of 
thawing. Context: These occur mostly late in the snow season... [DOC] [TLE] High Country Hazards - Rocky Mountain National Park (U.S. ... [PAR] Be prepared for changing conditions and carry these essentials; raingear, map 
and ... Although lion attacks are rare and bear attacks are even more rare, they 
are possible ... by a mountain lion is quite low compared to many other natural 
hazards. ... Open slopes of 30 to 45 degrees can be loaded with dangerous 
masses of... [DOC] [TLE] Angle of repose - Wikipedia [PAR] The angle of repose, or critical angle of repose, of a granular material is the 
steepest angle of descent or dip relative to the horizontal plane to which a 
material can be piled without slumping. At this angle, the material on the slope 
face is on the verge of sliding. .... The box is slowly tilted at a rate of 
approximately 0.3 degrees/second. [DOC] [TLE] AVALANCHE by Caitlyn Cottam on Prezi [PAR] May 9, 2014 ... Check out this article to learn more or contact your system administrator. ... Or 
how they became one of the worst natural disasters in the world? ... These are a 
mix of both loose snow avalanches and slab. under the cloud of powder snow is 
a ... They happen on snowy mountains of 30-45 degree-slopes. [DOC] [TLE] What is an Avalanche - Natural Disasters [PAR] As an avalanche becomes nearer to the bottom of the slope, it gains speed and 
power, this ... Eventually these weak layers can no longer hold up the weight on 
the ... Any slope that is between 25 to 45 degrees is susceptible to snow 
movement. ... If the slope is a convex slope more tension occurs in the snow 
causing the... [DOC] [TLE] GENERAL RULES FOR AVOIDING AND SURVIVING SNOW ... [PAR] The possible combinations and inter-relationships of these factors are countless 
and ... Slope steepness - Slopes of 30-45 degrees (60-100%) are most likely to ... 
Old Snow - When the old snow depth is sufficient to cover natural anchors, such... [DOC] [TLE] NATURAL HAZARDS AND DISASTERS: LANDSLIDES [PAR] Continuing growth of these urban centers, however, is pushing development onto 
... and sculpted by streams and landslides; slopes as steep as 45 degrees are 
common. ... 17) includes most of north-central and northwestern Puerto Rico 
north of the ... All major types of landslides occur in Puerto Rico, and all 
physiographic... [DOC] [TLE] How Avalanches Occur - Boston Commons High Tech Network [PAR] Dec 22, 2015 ... [5] Most avalanches occur on slopes between 30 and 45 degrees, but can ... [13] 
These avalanches can occur in dry or wet snow, in winter or summer. ... About 90 
percent of all avalanches start on slopes of 30-45 degrees; about 98 ... 
earthquakes can also trigger an avalanche by shaking the mountain... [DOC] [TLE] Forest Service issues avalanche warning for Mt ... - US Forest Service [PAR] May 15, 2009 ... While most of these were shallow slabs, some were more than 1000 ft. ... Ninety 
percent of avalanches occur on slopes from 30-45 degrees. [DOC] [TLE] Natural Hazards - Avalanches [PAR] Avalanches, Avalanche, Natural Hazards and Natural Disasters Association, ... 
Slope angle is important as most avalanches occur on slopes between 25 and ... 
300,000 cubic metres of snow slid down a 30 degree slope which reached a... [DOC] [TLE] Term 3 Research Project-Natural Disasters-Avalanches | GO THE ... [PAR] Sep 14, 2016 ... These avalanches can reach speeds of 130 kilometres within 5 seconds, ... When 
the trigger occurs it causes the snowpack to collapse and cause an avalanche. ... 
Convex slopes of 30-45 degrees are the most dangerous. [DOC] [TLE] How to Survive An Avalanche: Escape Certain Death [PAR] SEARCH: Emergency Supplies, Natural Disasters, Food Shortages & Riots, .... 
Slope steepness - Slopes of 30-45 degrees are the ones most

Question: Most of these natural disasters occur on slopes of 30-45 degrees
Answer: avalanches