Question

Please select the word frThe type of seismic waves that arrive at the surface first and move by compressing and expanding the ground like an accordion are called a. S waves. B. P waves. C. Surface waves. D. Mercalli waves. Please select the best answer from the choices provided A B C D

Answer 1

i think its the p wave or, s wave

Answer 2

Option (B)

Step-by-step explanation:

Seismic P waves are the primary waves that are generated during an earthquake. This wave propagation can be marked by the alternating compression and extension. The speed of this wave is 4-8 km/sec on average. It can travel at a faster rate, in comparison to the S waves. So they reach the surface fast. They can travel in both solid as well as liquid. But these waves are less dangerous than the S waves as surface waves propagate through the surface causing a lot of damage.

Thus, the correct answer is option (B).