Fig. 5

Spectra of PcP and PKiKP and spectral ratios of PKiKP/PcP. Individual PKiKP, PcP, noise spectra, and PKiKP/PcP spectral ratios for a event 3, b event 6, and c event 11 (see Fig. 2 for the event location). (Top row) Spectra of PcP (blue lines) and PKiKP (red lines), noise in the 20 s window prior to PcP (gray lines), and noise in the 20 s window prior to PKiKP (black lines). Open circles are average spectral amplitudes for PcP, PKiKP, noise prior to PcP, and noise prior to PKiKP at each frequency. (Bottom row) Spectral ratios of PKiKP/PcP (red lines) and noise before PKiKP/PcP (black lines). Open circles are average values of spectral ratios at each frequency