Hi,
The interaction of a body wave with a free su=
rface=20
is complex and academically described in terms of a reflection coefficient =
and=20
surface amplification factor. To add to this the phase and reflection=20
coefficient are frequency dependent.
Total reflection occurs with the incident and refle=
cted=20
waves have the same amplitude.
Although the tractions are equal and opposite, the displacement of the=
=20
incident and reflection waves are additive, and so the surface displacement=
is=20
twice that in the incident wave. This behaviour can be described by a=
=20
surface amplification factor for the transverse displacement in the horizon=
tal=20
plane
The Seismic Wavefield B.L.N.Kennett
Perhaps somebody could translate this into ordinary English!
Martin