Anisotropic

VTI and TTI media: pseudo-acoustic VTI, the rotated staggered grid in 2-D and 3-D, and the displacement formulation.

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  Wavefield · VTI + shear suppression

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  Run Duveneck (1st-order), Liang (2nd-order pseudo-acoustic), and Alkhalifah (η-acoustic) through the unified AcousticAniso factory on the canonical Duveneck Fig 2 setup; the trailing cell demonstrates the δ→ε disk taper that kills the pseudo-acoustic shear artefact.

  Open notebook

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  Wavefield · Elastic TTI

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  Rotated staggered-grid (ElasticTTI) vz snapshots across three tilt / azimuth cases — the Duveneck Fig 2 setup at full resolution with (ε, δ, γ, θ, φ) rotated symmetry axis.

  Open notebook

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  Wavefield · Elastic TTI · 3-D

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  ElasticTTISG3D on a 2.88 km cube: vz through the source plane for a VTI reference and two rotated axes. In 3-D the azimuth stops being decorative — at φ = 45° the qP front leaves the x–z plane, which no 2-D run can show.

  Open notebook

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  Wavefield · Elastic TTI · displacement (Oh 2020)

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  ElasticTTI2nd: two displacements on a triple time buffer instead of three velocities and five stresses, with the hierarchical (vh, η) parametrisation of Oh et al. 2020. Three tilts, cross-checked against ElasticTTISG on the qP wavefront.

  Open notebook