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





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