found this explanation at
Sympathetic Vibratory Physics - Vibration as Spiral Vortex
check out the picture there too

"These modes manifest in three perpendicular directions. The straight-lined is Longitudinal; the radial from the center line to the spiral is the Transverse or Shear waves; the spiral is the Raleigh, Lamb or Love wave. When any one of them is present they are all present. Magnitude may vary for each. Superimposing opposite phases will make the energy scalar or latent. Wave forms can be misleading. There are actually no waves per se. Energy moves as a polarization vector. What we see as a wave is actually the result of other forces acting on subtler and higher levels of causative actions."