Question

What kind of wave causes particles in rocks to move at right angles to the direction of the wave

Answer 1

A transverse wave is a wave in which particles of the medium vibrate at right angles, or perpendicular, to the direction that the wave travels.

Answer 2

Secondary waves

A type of seismic body wave in which rock particles vibrate at right angles to the direction of wave travel. Secondary waves cause the rocks they pass through to change in shape.