Fig. 1: Location map and schematic ray paths of PKIKP multiples. | Nature Communications

Fig. 1: Location map and schematic ray paths of PKIKP multiples.

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

Fig. 1

A The location map of the 22 Jan 2017, Mw 7.9 Solomon Islands earthquake and stations that contribute to the global stack (see Fig. 2). Black inverted triangles denote the seismic stations, and beachball marks the location and mechanism of the earthquake. The contours show the epicentral distances from the event. B Schematic ray paths of the second and fourth PKIKP multiples, i.e., PKIKP2 and PKIKP4, reverberating along the Earth’s diameter twice and four times. \({\xi }^{{\prime} } \pm \Delta \xi^{\prime}\) is the representative sampling direction angle relative to the Earth’s rotation axis (ERA). The red dashed-dotted circle denotes the tentative innermost inner core (IMIC) boundary with a radius of 650 km. C Similar to panel (B) but for PKIKP and the third multiples, i.e., PKIKP3 reverberating along the Earth’s diameter three times.

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