Geophysical ProspectingVolume 69, Issue 6 p. 1387-1387 ErratumFree Access Erratum First published: 14 June 2021 https://doi.org/10.1111/1365-2478.13087AboutSectionsPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL In Wang, Lu and Zhang (2021), the following errors were found on pages 351, 354 and 355. On page 351, Equation (4) currently read: u q P = p x sin v + p z cos v , u q S V = − p x cos v + p z sin ν , (4) This should be: u q P = u x sin ν + u z cos ν , u q S V = − u x cos ν + u z sin ν , (4) On page 354, a coefficient is missing from the root symbol of Equation (7) and currently read: v q P ( θ ) = V P 0 1 + ε sin 2 θ + f 2 1 + 2 ε sin 2 θ f 2 − 2 ( ε − δ ) sin 2 θ f − 1 , v q S V ( θ ) = V P 0 1 + ε sin 2 θ − f 2 1 + 2 ε sin 2 θ f 2 − 2 ( ε − δ ) sin 2 θ f + 1 . (7) This should be: v q P ( θ ) = V P 0 × 1 + ε sin 2 θ + f 2 1 + 2 ε sin 2 θ f 2 − 2 ( ε − δ ) sin 2 2 θ f − 1 , v q S V ( θ ) = V P 0 × 1 + ε sin 2 θ − f 2 1 + 2 ε sin 2 θ f 2 − 2 ( ε − δ ) sin 2 2 θ f + 1 . (7) On page 355, the sentences after Equation (10) currently read: Although equations (9) and (10) are equivalent to equations (7) and (8), the latter two avoid repetitive operations. If we can obtain the values of (c13 + c44) sin θ cos θ and [(c11 − c44) sin2 θ − (c33 − c44) cos2 θ], the remaining computation is little. Figure 2 shows the change in the polarization angle concerning the phase angle for the qP-wave case with VS0 / VP0 = 0.6 and Thomsen parameters ε = 0.3, δ = 0.1. The group angle, which indicates the direction of the group velocity, is also plotted in the figure to show its diffeence from the phase angle. This should be: Although equations (9) and (10) are equivalent to equations (7) and (8), the latter two avoid repetitive operations. If we can obtain the values of (c13 + c55)sin θcos θ and [(c11 − c55)sin2 θ − (c33 − c55)cos2 θ], the remaining computation is little. Figure 2 shows the change in the polarization angle concerning the phase angle for the qP-wave case with VS0 / VP0 = 0.6 and Thomsen parameters ε = 0.3, δ = 0.1. The group angle, which indicates the direction of the group velocity, is also plotted in the figure to show its diffeence from the phase angle. We apologize for these errors. REFERENCE Wang, X., Lu, Y. & Zhang, J. (2021) Elastic wave-mode separation in 2D transversely isotropic media using optical flow. Geophysical Prospecting, 69, 349– 371. Volume69, Issue6July 2021Pages 1387-1387 ReferencesRelatedInformation