Landslides are very common at foothill areas. So, we should not construct houses at the foothill areas.

North Northeast one : Gangetic plains covering the states of Punjab Haryana, Uttar Pradesh, North Bihar, West Bengal and Brahmaputra valley are the major flood prone areas of our country.
Other Regions : Coastal Andhra Pradesh, Odisha and Southern Gujarat

i) Hazard is defined as a thing, person, event or factor that poses a threat to people, structures or economic assets and which may cause a disaster.
ii) It could be either human-made or naturally occuring in the environment.

i) Landslide is a rapid downward movement of rock, soil and vegetation down the slope under the influence of gravity.
ii) Landslides are generally sudden and infrequent
iii) Presence of steep slope and heavy rainfall are the major causes of landslides.
Other causes of landslides:
i) Weak ground structure
ii) Deforestation
iii) Earthquakes
iv) Volcanic eruptions
v) Mining
vi) Construction of roads and railways over the mountains.
landslide prone
i) Landslides are very common along the steep slopes of the Himalayas the Western Ghats and along the river valleys.
ii) In Tamil Nadu Kodaikanal and Ooty and frequently affected by landslides.

Earthquake is a violent tremor in the earth's crust, sending out a series of shock waves in all directions from its place of origin.
Effects of Earthquake
The primary effects of earthquakes are ground shaking, ground rupture, landslides, Tsunamis and leakage of gas (liquefaction).
Secondary effect
Fire is probably the single most important secondary effect of earthquakes.