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Earth, Planets and Space
Fig. 6 | Earth, Planets and Space

Fig. 6

From: Active-source seismic survey on the northeastern Hawaiian Arch: insights into crustal structure and mantle reflectors

Fig. 6

a Record sections covering an offset range of 750 km from OBS1–5 along the EW line. Reduction velocity is 8.5 km/s. b Record sections from OBS1, 2, and 5 along the NS1, NS2, and NS5 lines, respectively. Reduction velocity is 8.0 km/s. All observed waveforms were band-pass-filtered (5–20 Hz), and adjacent traces were stacked within an offset range of 200 m to improve the signal-to-noise ratio. The green, red, cyan, and yellow lines indicate the calculated travel times of P2, P3, Pt, and Pn, respectively. The dashed red line on the OBS1 record section along the EW line indicates the travel times of P3, which were calculated by using a velocity model without any decrease in crustal Vp

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