Which of the following statements in respect of landslides are correct

Which of the following statements in respect of landslides are correct?

These occur only on gentle slopes during rain.
They generally occur in clay-rich soil.
Earthquakes trigger landslides.

Select the correct answer using the code given below.

1 and 2 only

1 and 3 only

2 and 3 only

1, 2 and 3

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC NDA-1 – 2022

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Statement 1 is incorrect because landslides occur primarily on steep slopes where gravity is a significant factor, not only on gentle slopes. While rain is a common trigger, landslides can occur due to other factors as well. Statement 2 is correct as clay-rich soils become unstable when saturated, increasing the risk of landslides. Statement 3 is correct as earthquakes are well-known triggers for landslides due to ground shaking.

Landslides are mass movements occurring on slopes. Their occurrence is influenced by factors like slope angle, soil/rock type, water content, and external triggers like rain or earthquakes.

Factors contributing to landslides include geological factors (weak materials, jointing), morphological factors (steep slopes, erosion), physical factors (intense rainfall, seismic activity), and human factors (deforestation, construction). Clay soils are particularly prone to landslides due to their low shear strength when wet.

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