Question

In the below given diagram, which set of waves represent surface waves?

• A. A
• B. B
• C. C
• D. They are all surface waves

Answer 1

The correct option is C C

Siesmic waves are categorised as body waves and surface waves. Body waves are further categorised as P-waves (primary) and S-waves (secondary). P-waves, S-waves and surface waves can be identified on the above given seismographic diagram.

The first wave 'A' is the P-wave. The following wave 'B' is more intense and is the S-wave. The next set of waves to be recorded by the siesmograph are the surface waves. They are the slowest and the most destructive of the three kinds of siesmic waves.