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landslides ![click to hear : landslides click to hear : landslides](../../images/speaker-vert.gif)
Ground movements that vary in speed, depending on the slope’s gradient, the nature of the soil and what triggers it.
mudflow ![click to hear : mudflow click to hear : mudflow](../../images/speaker-vert.gif)
Sudden flow of mud along a slope; it occurs when torrential rains quickly saturate the soil.
creep ![click to hear : creep click to hear : creep](../../images/speaker-vert.gif)
Very slow, imperceptible movement of earth along a slope, caused mainly by alternating wet and dry periods.
earthflow ![click to hear : earthflow click to hear : earthflow](../../images/speaker-vert.gif)
The upper section of a sloping water-soaked terrain that collapses, forming a tongue of land the length of the slope.
rockslide ![click to hear : rockslide click to hear : rockslide](../../images/speaker-vert.gif)
Rock mass that suddenly detaches and falls from the top of a steep slope; it is caused by freeze-thaw action or by gravity.