Azimuthal Anisotropy
Azimuthal Anisotropy : A term used when the seismic wave properties depend on the azimuth of propagation in the horizontal plane. For example, Pn waves in the neighborhood of an oceanic spreading center exhibit azimuthally anisotropic velocity but also SKS and SKKS waves due to upper mantle flow anisotropy (see Fig. 2.7 ??? in Chapter 2 of the Manual)
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