Question

The 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.

Answer 1

The type of seismic waves that arrive at the surface first and move by compressing and expanding the ground like an accordion are called "P-Waves"

In short, Your Answer would be Option B

Hope this helps!