An example of an S wave is wiggling or shaking a rope which is tied down at one or both ends. Both P and S waves travel outward from an earthquake focus inside the earth. The waves are often seen as separate arrivals recorded on seismographs at large distances from the earthquake.
DIFFERENCE
P waves are the fastest and have the lowest amplitudes; S waves are the second fastest and have the second lowest amplitudes
P waves can travel through solids and liquids. S waves are transverse, and they are slower than P waves. They travel through solids only. Seismic records can be used to determine the location of the epicentre of the earthquake.
