Surface waves: a wave on the surface of a moving Earth or under the Earth's surface slightly. And moving with a speed that is slower than the waves in the medium. Surface waves are known to have two types.
.....Love wave: a wave or a particle wave that makes the L of the medium vibrate in horizontal near the Earth's surface. By having a direction perpendicular to the direction of motion of the wave. Love waves are waves that cause damage to the Foundation of the building. And various buildings.
....Rayleigh wave: R wave is the wave or particles of the medium movement in the vertical plane is oval in the same direction as the motion of the waves, mara. Make the surface world is shaking up and down.