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Disasters  see also The weather, Climate: hurricanes, cyclones and storms
About Avalanches Snow is deposited in successive layers as the winter progresses. These layers may have dissimilar physical properties and an avalanche occurs when one layer slides on another (Surface Avalanche), or the whole snow cover slides on the ground (Full-Depth). An avalanche may be Dry or Wet, according to whether free water is present in the snow. It may be of Loose Snow, when the avalanche starts at a single point or a Slab Avalanche which occurs when an area of more cohesive snow separates from the surrounding snow and slides out. In practice, any snow slide big enough to carry a person down is important. Avalanche configurations are illustrated in the SAIS "Avalanche Recording Form"
Almanac of disasters fires, earthquakes, transportation
Anatomy of an avalanche animation
Avalanche awareness
Avalanches many people get killed every year because of avalanches
Avalanches tutorial, Avalanche Encyclopedia, Avalanche Danger Scale
Avalanches an avalanche is a mass of loosened snow or ice that suddenly and swiftly slides down a mountain, often growing as it descends and collects additional material such as mud, rocks, trees and debris. Snow avalanches can occur whenever snow is deposited on slopes steeper than approximately 20 to 30 degrees
Disaster image catalog pictures and images
Earthforces earth science, plate tectonics, volcano, earthquake, tsunami, floods
Earth watching Cyclones, Earthquakes, Fires, Floods, Oil Slicks, Volcanoes, photos from space
Forest fires there are two ways a forest fire can be created: natural and by humans
Freak waves freak waves are waves that can raise 60 meters in height from a calm sea to destroy ships are in existance, researchers told. Many tought it was mysterious but tides seem to change. Growing evidence including satellite images, shed light in to these stories
Freak waves, part of Power of waves animated
Freak waves freak waves, rogue waves, extreme waves and ocean wave
Freak waves - Rogue waves
Landslides the term landslide refers to the downslope movement of masses of rock and soil. Landslides are caused by one or a combination of the following factors: change in slope gradient, increasing the load the land must bear, shocks and vibrations, change in water content, ground water movement, frost action, weathering of rocks, and removal or changing the type of vegetation covering slopes
Natural hazards photographs of damage caused by natural hazards
Savage earth if our planet is a sleeping giant, it slumbers fitfully, slowly and insidiously, earthquakes, volcanoes, tsunamis, and other natural disasters. Highlights include animated illustrations
Savage earth animations page hot zones, volcanic eruption, collision zone animation, mid-ocean ridge animation, subduction animation
Wave simulator and freak waves
Catastrophic flood dynamic database reports of catastrophic floods, and of the various kinds of evidence by which they are recognized, are listed in this database
Earth observatory: real time flood map
Floods a flood appears, when more water is coming in than the ground and plants can take up. Water can come in through rains, rivers, broken dams and smelting snow. Most people die because of the coastal floods
Floods a flood is the inundation of normally dry land resulting from the rising and overflowing of a body of water. It is a natural geologic process that shapes the landscape, provides habitat and creates rich agricultural lands. Human activities and settlements tend to use floodplains, frequently interfering with the natural processes and suffering inconvenience or catastrophe as a result
Floods a flood typically occurs when a river (or other body of water) overflows its banks
Flood warnings
Floods alert
Iceland flood on 30 Sept. 1996 a subglacial volcano erupted under the Vatnajokull ice cap. Subsequently on 5 Nov. at 08:00 meltwater reached the edge of the glacier fracturing it in several places. At 08:30 the water was 3-4 m high and 500-600 m across issued from the glaicer
Lynmouth flood of 1952
Sedimentary evidence favouring the formation of rogen landscapes by outburst floods

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Last updated on: 2011-01-02 | Copyright © 2011-2021 Educypedia.