The most commonly used geophysical model to account for this property is the VTI model.
Jean-Pierre Blangy demonstrated that this property has significant effects on AVO analysis, especially when impedance contrasts are low. This property creates "hockey sticks" of nonhyperbolic movement in the far offsets of normal moveout analysis. The relevance of this property was completely redefined by a paper about its "weak" form by Leon Thomsen, in which he introduced his namesake parameters: epsilon, delta, and gamma. The most commonly used geophysical model to account for this property is the VTI model. This property took a central role in the field of (*) exploration geophysics after its azimuthal type was shown to induce S-wave splitting. Thomsen defines this property as "the dependence of seismic velocity upon angle". For 10 points, name this property that more generally refers to the properties of a material being directionally dependent.
Jean-Pierre Blangy demonstrated that this property has significant effects on AVO analysis, especially when impedance contrasts are low.
seismic anisotropy [or: transverse isotropy, TI]