41 citations · 45 across the 2 of their papers we have counts for
3 papers
physics.geo-ph2019
Christoffel equation in the polarization variables
Vladimir Grechka
We formulate the classic Christoffel equation in the polarization variables and solve it for the slowness vectors of plane waves corresponding to a given unit polarization vector.…
physics.geo-ph2019★ 4 cited
Triple singularities of elastic wave propagation in anisotropic media
Vladimir Grechka
A typical singularity of elastic wave propagation, often termed a shear-wave singularity, takes place when the Christoffel equation has a double root or, equivalently, two out of t…
physics.geo-ph2019★ 41 cited
NMO-velocity surfaces and Dix-type formulae in anisotropic heterogeneous media
Vladimir Grechka, Ilya Tsvankin
Reflection moveout of pure modes recorded on conventional-length spreads is described by a normal-moveout (NMO) velocity that depends on the orientation of the common-midpoint (CMP…