Fig. 4From: Complex inner core boundary from frequency characteristics of the reflection coefficients of PKiKP waves observed by Hi-netSpectrograms including PcP and PKiKP. Raw seismograms and spectrograms of event 3 for a PcP and b PKiKP recorded at station IKTH. Spectrogram scaling is in decibels (dB). The predicted arrival times of PcP and PKiKP are located at a lapse time of 50 sBack to article page