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Progress in Earth and Planetary Science
Fig. 10 | Progress in Earth and Planetary Science

Fig. 10

From: Complex inner core boundary from frequency characteristics of the reflection coefficients of PKiKP waves observed by Hi-net

Fig. 10

Configuration of 2D finite difference simulations and a test run. a Configuration of 2D finite difference simulations using e3d (Larsen and Shultz 1995). Small red circles represent multiple sources used to simulate a plane wave. Triangles mark the locations of virtual receivers used to record the reflected waves. Incidence angles θ are a control parameter. b Spectral ratios between upward and downward waves using a flat discontinuity in simulations for incidence angles of 10°, 20°, and 30°. Thick lines are theoretical values of the reflection coefficient calculated using ak135 (Kennett et al. 1995)

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