Weak elastic anisotropy - Delta Geophysics

GE()PHYSIC S. VOL. 51. NO. IO (OCTOBER 1986); P. 19541966, 5 I TABLE Weak elastic anisotropy Leon Thomsen* ABSTRACT Most bulk elastic media are weakly anisotropic. -The equations governing weak anisotropy are much simpler than those governing strong anisotropy , and they are much easier to grasp intuitively. These equations indi- cate that a certain anisotropic parameter (denoted 6) controls most anisotropic phenomena of importance in exploration Geophysics . some of which are nonnegligible even when the anisotropy is weak. The critical parame- ter 6 is an awkward combination of elastic parameters, a combination which is totally independent of horizon- tal velocity and which may be either positive or nega- tive in natural contexts.

Weak Elastic Anisotropy 1955 there are nine such relations, each involving one component of stress and nine components of strain. These nine equations

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  Elastic, Wake, Anisotropy, Weak elastic anisotropy

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