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Earth, Planets and Space
Fig. 9 | Earth, Planets and Space

Fig. 9

From: Crust and uppermost mantle structure of the Kyushu-Palau Ridge, remnant arc on the Philippine Sea plate

Fig. 9

Vertical record section, ray diagram, and estimated positions of velocity discontinuities. a Vertical geophone record section for OBS 43, line KPr24. The data were processed through predictive deconvolution and band-pass-filtered (4–20 Hz). A gain factor proportional to distance has been used to enhance the distant seismograms. The reduction velocity is 8.0 km/s. Calculated travel times of first arrivals and Moho reflections (PmP) are shown on the record section. b Ray diagram. Iso-velocity contour interval is 0.25 km/s. c Estimated positions of several velocity discontinuities beneath the KPR. The reflectors with white arrows correspond the large amplitude signals in the red ellipses in (a)

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