## PP wave displacement R/T coefficients in weakly anisotropic media

**Ivan Psencik** **&**
**Vaclav Vavrycuk**
### Summary

Approximate *PP* plane wave displacement coefficients of reflection and
transmission for weak contrast interfaces separating weakly but arbitrarily
anisotropic elastic media are presented. The *PP* reflection coefficient for
such an interface has been derived recently by Vavrycuk and
Psencik (1997). The *PP* transmission coefficient presented in
this paper was derived by the same approach. The coefficients are given
as a sum of the coefficient for the weak contrast interface separating
two nearby isotropic media and a term depending linearly on contrasts of
the so-called weak anisotropy (WA) parameters (parameters specifying
deviation of properties of the medium from isotropy), across the interface.
While the reflection coefficient depends only on 8 of the complete set of
the WA parameters describing *P* wave phase velocity in weakly
anisotropic media, the transmission coefficient depends on their
complete set. Tests of accuracy of the approximate formulae are presented
on several models.

### Whole paper

The reprint is available in
PDF (1533 kB).

PAGEOPH, **151** (1998), 699-718.