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The derivation of coupled wave equations in terms of elastic strains
differs only slightly from the description in terms of elastic
displacements.
The constitutive equation in terms of strains is

| |
(20) |

Substituting Equation 20 into 5 gives
the following wave
equation in terms of elastic strains (omitting the source term):
| |
(21) |

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** Up:** COUPLED WAVE PROPAGATION IN
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Stanford Exploration Project

1/13/1998