A landslide is a phenomenon which causes land to slip or rocks and sand to be pushed downwards due to gravitational force. Landslides usually happen when the stability of a slope changes or is disturbed due to natural or man-made conditions. Landslides also occur in places that do not have lots of trees. Earthquakes, heavy rain, waterfalls, digging and blasting are some of the causes of landslides. The landslide that you have referred to was caused by heavy rainfall.