Abstract

In the paper, “Seismic velocities in transversely isotropic media,” by Franklyn K. Levin in Geophysics, v. 44, no. 5, p. 918–936 (May 1979), the following correction should be made. Equation (A-7) which appears on p. 933 should read as follows:

dV2,3/dθ = (sin 2 θ/4 V2,3)[P2−Q2±{[((P2−1)sin2 θ+(Q2−1)cos2θ)(P2−Q2)+2Δ2cos2 θ]/[((P2−1)sin2θ+(Q2−1)cos2 + Δ2 sin2 2θ]1/2}].

The curves plotted in the paper were computed with the correct equation.

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