2020
DOI: 10.1029/2019jb018868 View full text |Buy / Rent full text
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Abstract: This paper presents a fast sweeping method (FSM) to calculate the first‐arrival traveltimes of the qP, qSV, and qSH waves in two‐dimensional (2D) transversely isotropic media, whose symmetry axis may have an arbitrary orientation (tilted transverse isotropy [TTI]). The method discretizes the anisotropic eikonal equation with finite difference approximations on a rectangular mesh and solves the discretized system iteratively with the Gauss‐Seidel iterations along alternating sweeping orderings. At each mesh poi… Show more

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“…Asymptotic approaches allow traveltime computation independent of the P or S wave traveltimes. While the computation of qSH wave traveltimes is similar to the qP case, solving qSV traveltimes should overcome the presence of triplications (Padhi and Willis, 2019;Huang et al, 2020). When performing ray tracing, one should avoid unexpected jumps between branches by constraining the slownesss vector sampling (Vavryčuk, 2001).…”
Section: Introductionmentioning