Answer:
usually faster. The P-wave is a compressional wave, meaning it is a wave of compression and expansion that travels through the material. It is also known as a primary wave, and it is the fastest type of seismic wave. The S-wave, or secondary wave, is a shear wave, which is a wave that causes the material to oscillate perpendicular to the direction of the wave. The S-wave is usually slower than the P-wave.