There are four types of landslides. Soil creep is a slow movement—as its name suggests—due to tiny shifts in the soil particles. Slumping is a faster slide, occurring when slabs of land slip down a slope. Debris flow happens when a slope becomes saturated with water and triggers a landslide of a water-soaked mass of soil and rocks. Rockfalls are sudden slides caused by heavy rain or frost dislodging larger rock pieces.
One type of natural disaster can happen in any part of the world. Wherever a steep hillside is found, when the pull of gravity is greater than the forces that hold together the particles on the slope, a mass of loose material may come crashing down the slope. On a rocky or muddy hillside, unstable rocks and soil can cause a landslide.