Figure 4From: Wide-angle refraction experiments in the Daito Ridges region at the northwestern end of the Philippine Sea plateObserved record section, ray diagram, and synthetic seismogram. (a) Observed record section for OBS 41 of line DAr2 on the Amami Plateau. The reduction velocity is 8 km/s. The arrival time readings and calculated travel times are shown on the record section. The calculated Pg arrivals between −30 and 30 km are artificial. (b) Ray diagram. (c) Synthetic seismogram.Back to article page