In this video we examine the many causes of landslides. These mass movements of earth occur when gravity overcomes the frictional forces keeping layers of rock in place on a slope, resulting in planes of land moving and falling.
The Telegraph (Dec 1, 2016)
Landslides occur when material like debris, rock, and soil become dislodged from the earth and slide downward at speeds that can approach 100 miles per hour. David Montgomery at the University of Washington studies past and present landslides to try to understand what causes