Velocity ratio

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The ratio of P-wave velocity to S-wave velocity in a rock, often called gamma (uppercase), Γ, VP/VS, VP:VS ratio or even just 'VPVS'. An important property in rock physics and AVO analysis. Usually about 2 in water-wet clastic rocks.

See also


Conversion formulas — edit
The elastic properties of homogeneous isotropic linear elastic materials are uniquely determined by any two moduli. Given any two, the others can thus be calculated. Key reference: Mavko, G, T Mukerji and J Dvorkin (2003), The Rock Physics Handbook, Cambridge University Press.

P-wave velocity
S-wave velocity
Velocity ratio
1st Lamé parameter
Shear modulus
Young's modulus
Bulk modulus
Poisson's ratio
P-wave modulus

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