What are the second fastest type of wave.they cause rock to move side to side?

The second fastest type of wave is the shear wave, or S-wave. These waves cause particles in the material they travel through to move perpendicular to the direction of wave propagation, resulting in a side-to-side motion. S-waves typically travel slower than primary waves (P-waves) and are unable to move through liquids. They are commonly generated during seismic events, contributing to the shaking experienced during earthquakes.