Fig. 11From: Active-source seismic survey on the northeastern Hawaiian Arch: insights into crustal structure and mantle reflectorsa–c Close-up of OBS2 record sections (see Fig. 6a). Arrows indicate the wide-angle reflection phases (DRs) at large offsets. The travel times calculated from the 2-D ray tracing are superimposed on the record sections in the bottom panels. Reduction velocity is 8.5 km/s. Pn indicates refraction phases from the uppermost mantle. d Ray diagram for each DR. Black bars indicate reflection pointsBack to article page