Seismic Waves. Types of Wave Propagation. Body Waves P & S Waves. P and S waves are often called body waves because they propagate outward in all directions from a source (such as an earthquake) and travel through the interior of the Earth.
Types of Wave Propagation
Surface WavesRayleigh & Love Waves
For more descriptions/information click on http://www.tjhsst.edu/~jlafever/wanimate/Wave_Properties2.html