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at lest 300000 landslids happen each year
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoLandslides typically occur after periods of heavy rain, when the ground has become waterlogged and unable to hold together. However, landslides can also be triggered by mining, leaking water pipes, earthquakes and volcanic eruptions.
Wiki User
∙ 8y agoDepending on the cause(s), landslides can last just a few seconds up to a minute or so. However, they may be on going as forces that continually act upon the affected area dislodge more sediments.
Wiki User
∙ 8y agoAs one example, the landslide in Oslo, in Washington state occurred after it had rained many days. It occurred so suddenly, people in homes had no warning or time to escape. In less than 1 minute, an entire cliff of a hillside sheered off, slid down the height, and continued for one mile beyond the houses. Scientists who study landslides were surprised to see how far the mud, trees, and boulders traveled. But that happens because the water saturated ground forms a slippery surface between the dirt particles, so there is no friction. Mud becomes as smooth and slippery as if standing on a sheet of ice! They show a documentary on You-Tube where scientists built a large trough down an incline. The dump in dirt, then add in electrodes to measure when, how fast, and how much water content is needed to made particles of earth slide against each other. Then, they turn on water and wait for the controlled slide to occur in the experiment. Once saturation occurs, it can take mere seconds for the mass of "land" to move as a whole, sending the top to bottom of the soil (in distance) to become one mass of moving earth.
In this documentary, scientists say the Oslo mud traveled at 60mph in less than 1 minute! The trough experiment I mentioned is about halfway through this video. It is fascinating to watch the experiments!
Wiki User
∙ 11y agoIt is difficult to estimate how often they occur, because it can depend on the weather (like heavy rain).
Wiki User
∙ 11y agoIt takes about a butt crack and a half and a 5 dumps for a landslide to occur.
Wiki User
∙ 11y agojemimah whiteway is so awesome
Anonymous
every year
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Where does landslides mostly occur?
usually happen on landforms
Do landslides occur near rivers?
Landslides can occur anywhere that there is a slope. If there is a slope near a river, there is every chance that, given the right conditions, a landslide could occur.
How are landslides causes?
Landslides typically occur after periods of heavy rain, when the ground has become waterlogged and unable to hold together. However, landslides can also be triggered by mining, leaking water pipes, earthquakes and volcanic eruptions.
What part of the world is most known for landslides?
Landslides occur anywhere in the world where there is mountainous countryside, but even then, they are not restricted to only areas of high elevation. However, generally speaking, places with a lot of high mountain ranges such as Nepal are statistically most likely to have landslides.
Was there a tsunami that recently hit Japan?
Yes. Tsunamis can occur in lakes as the result of landslides.
What time of the year do landslides occur?
Landslides typically occur after periods of heavy rain, when the ground has become waterlogged and unable to hold together. However, landslides can also be triggered by mining, leaking water pipes, earthquakes and volcanic eruptions. So, whatever time of year an area has heavy rainfall would be the time when landslides would be more likely to occur. In the United States, that would generally be in the spring - March through May.
When do landslides generally occur?
Landslides occur in seasons of heavy rains they occur mostly in places where the soil structure is weak
Where does landslides mostly occur?
usually happen on landforms
Do landslides occur near rivers?
Landslides can occur anywhere that there is a slope. If there is a slope near a river, there is every chance that, given the right conditions, a landslide could occur.
How does the geographical location of the countrystatearea support landslides to occur?
it occur by sliding
What event is likely to occur when vegetation is destroyed?
Landslides
What are some effects of landslides?
earthquakes may occur because of landslides and tidal waves may also be effects.
How does landslides change the earth?
Landslides can make new lands after they occur. Because it looks different than before it occurred. landslides can change water sources too.
How does landslides change earth?
Landslides can make new lands after they occur. Because it looks different than before it occurred. landslides can change water sources too.
How does landslides changes the Earth's surface?
Landslides can make new lands after they occur. Because it looks different than before it occurred. landslides can change water sources too.
How does landslides change Earth's surface?
Landslides can make new lands after they occur. Because it looks different than before it occurred. landslides can change water sources too.
Where do most landslides and floods occur?
Where the soil is loose and rains heavily
