Landslide

Landslide is a geological event that occurred because of ground motion such as falling rocks or clumps of soil. Although the main cause of this incident is that the gravitational influence of a steep slope, but there are also other factors that also affect:
erosion caused by rivers or ocean waves create the slopes are too steep
from rock and soil slopes weakened through saturation due to heavy rain
earthquakes causing pressure which resulted weak slopes
volcanic ash deposits create a quiet, torrential rain and dust flow
vibrations from machinery, traffic, use of explosives, and even lightning
weight that is too excessive, eg, from the gathering of rain or snow