Fig. 3
From: Seismological evidence for a localized mushy zone at the Earth’s inner core boundary
Comparisons of stacked PKiKP and PcP waveforms of two example events sampling two regions of ICB with different seismic characteristics. a Comparisons for event 5 which samples a sharp ICB beneath central China (black box labeled as A1 in Fig. 2b). b Comparisons for event 11 which samples a double-layered mushy ICB beneath southwest Okhotsk Sea (black box A4 and blue box B in Fig. 2b). Stacked PcP (black traces) and PKiKP (blue traces) waveforms are bandpass filtered in a frequency range of 2–3 Hz. The number of waveforms used in each stacking is indicated at the right of each trace
