Fig. 3: Cylindrically anisotropic model of Earth’s inner core (IC) inferred from exotic PKIKP multiples’ travel times. | Nature Communications

Fig. 3: Cylindrically anisotropic model of Earth’s inner core (IC) inferred from exotic PKIKP multiples’ travel times.

From: Up-to-fivefold reverberating waves through the Earth’s center and distinctly anisotropic innermost inner core

Fig. 3

Fractional velocity (see the Methods section) and fitting curves are plotted as a function of \(\xi^{\prime}\), the representative sampling direction of the ray (left) (see Fig. 1), and \({{{\cos }}}^{2}\xi^{\prime}\) (right). All measured differential travel times are corrected for mantle heterogeneities using the DETOX_P3 model49. Associated uncertainties are plotted by error bars. Dark solid lines are the optimal anisotropic models parameterized in Eq. 1, and light blue opaque lines represent the uncertainty surrounding the optimal model. Various broken lines show models from previous studies (see the legend). The top row (A) compares our inferred bulk IC model with other models, while the bottom row (B) compares our inferred innermost inner core (IMIC) model with other models. Yellow lines in (B) show a representative anisotropy model of the outer inner core (OIC) taken from ref. 34, which is used to account for the OIC structure and obtain our IMIC models.

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