Warning: Display title "Dictionary:<i>V<sub>S</sub>/V<sub>P</sub></i>" overrides earlier display title "Dictionary:VS/VP".
The ratio of velocities of S-wave to P-wave. This ratio is sensitive to lithology or interstitial fluid. The ratio is about 1/2 for most rocks, is larger for gas saturation, and zero for fluids. Measurements of Poisson's ratio give equivalent information.