Question

Which is the most destructive earthquake wave?

• A. P-wave
• B. S-wave
• C. L-wave
• D. None of these

Hint:

Surface waves (L-waves and Rayleigh waves) are responsible for almost all the damage associated with an earthquake, even though they are the slowest to arrive.

Answer 1

The Correct Option is C

The given question is asking about the most destructive type of earthquake wave. To answer this correctly, let's briefly examine the types of seismic waves involved:

• P-wave (Primary wave): These are the fastest seismic waves and the first to be detected by seismographs. They travel through solids, liquids, and gases but generally cause minimal damage.
• S-wave (Secondary wave): These follow P-waves and are slower, traveling only through solids. They can cause more damage than P-waves since they have a higher amplitude.
• L-wave (Surface wave): These waves travel along the Earth's surface and generally have the highest amplitude and the longest duration, causing the most severe ground shaking and damage.

The most destructive earthquake waves are L-waves, also known as surface waves. They travel along the Earth's surface and often cause significant damage during an earthquake due to their high amplitude and extended duration on the ground. This is why they are considered the most destructive.

In comparison, P-waves and S-waves, despite being significant in diagnosing an earthquake's characteristics, do less damage. L-waves, traveling with larger amplitudes, lead to more severe shaking and infrastructure damage.

Therefore, the correct answer is L-wave, as they are the most destructive in terms of earthquake activity.