Displacement in Rayleigh waves occurs in a retrograde elliptical motion normal to the surface and parallel to the direction of wave propagation.
22.
Krylov carried out research into Rayleigh waves, including their propagation at hypersonic frequencies, their propagation and scattering on curved and statistically rough surfaces.
23.
Rayleigh waves are much slower than body waves, roughly 90 % of the velocity of body waves for a typical homogeneous elastic medium.
24.
Low frequency ( < 20 Hz ) Rayleigh waves are inaudible, yet they can be detected by many mammals, birds, insects and spiders.
25.
In the Oklahoma City case, both seismic vibrations are a shallow-earth wave called a Rayleigh wave, after the 19th century English scientist Lord Rayleigh.
26.
In isotropic, linear elastic materials described by Lame coefficients \ lambda and \ mu, Rayleigh waves have a speed given by solutions to the equation
27.
One example is Rayleigh waves on the Earth's surface : those waves with a higher frequency travel more slowly than those with a lower frequency.
28.
This means that the velocity of a Rayleigh wave in practice becomes dependent on the wavelength ( and therefore frequency ), a phenomenon referred to as dispersion.
29.
Because Rayleigh waves are surface waves, the amplitude of such waves generated by an earthquake generally decreases exponentially with the depth of the hypocenter ( focus ).
30.
Rayleigh waves, also known as " ground roll ", are waves that travel as ripples with motion similar to those of waves on the surface of water.
