Which of the following statements with reference to L-Wave or Long Wave generated by an earthquake is/are correct?1.They follow the Earth's circumference
2.They travel at more or less at a constant rate
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This question was previously asked in

NDA-I (GAT) Official Paper (Held On: 13 Apr, 2025)

Answer 1

The correct answer is 1 only.

Key Points

L-Waves (Long Waves) travel along the Earth's surface, following its circumference.
They are also known as surface waves and are generated during earthquakes.
L-Waves are slower compared to P-Waves (Primary Waves) and S-Waves (Secondary Waves).
The speed of L-Waves is not constant and depends on the Earth's material properties and the nature of the medium.
They cause significant destruction due to their high amplitude and horizontal motion.

Additional Information

P-Waves: Primary waves are the fastest seismic waves, traveling through solids, liquids, and gases.
S-Waves: Secondary waves are slower than P-Waves and can only travel through solids.
Seismic Wave Categories: Seismic waves generated during earthquakes are categorized as body waves (P and S waves) and surface waves (L and Rayleigh waves).
Rayleigh Waves: Another type of surface wave that travels in an elliptical motion and causes vertical displacement.
Earthquake Impact: Surface waves, including L-Waves, are primarily responsible for the damage to buildings and infrastructure during an earthquake.