UPSC Prelims PYQ 2004: Geological causes of earthquakes

Consider the following geological phenomena:

1. Development of a fault
2. Movement along a fault
3. Impact produced by a volcanic eruption
4. Folding of rocks

Which of the above causes earthquakes?

1. 1, 2, and 3
2. 2 and 4
3. 1, 3, and 4
4. 1, 2, 3, and 4

Explanation

Option (d) is correct

• Earthquakes can result from a variety of geological processes. They may occur due to the development of faults and the sudden movement along existing faults, which release accumulated tectonic stress. Volcanic eruptions can also generate earthquakes through the movement of magma and associated underground disturbances. Additionally, folding of rocks caused by compressional forces within the Earth’s crust can trigger seismic activity when stresses are suddenly released.

Answer: (d) 1, 2, 3 and 4