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Progress in Earth and Planetary Science
Fig. 9 | Progress in Earth and Planetary Science

Fig. 9

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

Fig. 9

Summary map of frequency characteristics of P wave reflection coefficients at the ICB. Distribution of the reflection points of PKiKP waves at ICB (green dots), and “result numbers” indicating their frequency characteristics by colors. White: almost flat spectrum; blue: spectrum with a spectral hole; red: spectrum with a spectral peak; half red and blue: both a hole and a peak. Yellow dots indicate the exit and entrance points of PKiKP at the CMB. Double black and red circles are Fresnel zones at the ICB and CMB, respectively. Inner and outer circles are Fresnel zone estimates for 2 and 1 Hz, respectively

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