RT Journal Article SR Electronic(1) A1 Lu, Yongming A1 Liu, Qiancheng A1 Zhang, Jianfeng A1 Yang, Kai A1 Sun, HuiYR 2019 T1 Poynting and polarization vectors based wavefield decomposition and their application on elastic reverse time migration in 2D transversely isotropic media JF Geophysical Prospecting, VO 67 IS 5 SP 1296 OP 1311 DO https://doi.org/10.1111/1365-2478.12777 PB European Association of Geoscientists & Engineers, SN 1365-2478, AB ABSTRACT With the progress in computational power and seismic acquisition, elastic reverse time migration is becoming increasingly feasible and helpful in characterizing the physical properties of subsurface structures. To achieve high‐resolution seismic imaging using elastic reverse time migration, it is necessary to separate the compressional (P‐wave) and shear (S‐wave) waves for both isotropic and anisotropic media. In elastic isotropic media, the conventional method for wave‐mode separation is to use the divergence and curl operators. However, in anisotropic media, the polarization direction of P waves is not exactly parallel to the direction of wave propagation. Also, the polarization direction of S‐waves is not totally perpendicular to the direction of wave propagation. For this reason, the conventional divergence and curl operators show poor performance in anisotropic media. Moreover, conventional methods only perform well in the space domain of regular grids, and they are not suitable for elastic numerical simulation algorithms based on non‐regular grids. Besides, these methods distort the original wavefield by taking spatial derivatives. In this case, a new anisotropic wave‐mode separation scheme is developed using Poynting vectors. This scheme can be performed in the angle domain by constructing the relationship between group and polarization angles of different wave modes. Also, it is performed pointwise, independent of adjacent space points, suitable for parallel computing. Moreover, there is no need to correct the changes in phase and amplitude caused by the derivative operators. By using this scheme, the anisotropic elastic reverse time migration is more efficiently performed on the unstructured mesh. The effectiveness of our scheme is verified by several numerical examples., UL https://www.earthdoc.org/content/journals/10.1111/1365-2478.12777