Landslides can occur after heavy rain, if a retaining structure gives way, or if a weakness develops in the ground. They are called mudslides if the soil is saturated with water.
Computer simulation and film footage shows landslides and mudflows that took place in California in 1996 and 1997.
Explains the causes and effects of pyroclasitic flows.
View pictures and descriptions of the landslides and their aftermath.
A slideshow of photographs and explanations about the causes and effects of landslides in this part of US state of Washington.
Learn what a lahar is, where they occur, and the destruction they cause.
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