Abstract
Abstract P-wave velocity models related to the Philippine Sea plate subduction have been obtained from seismic explorations at the northern end of the Nansei-Shoto (Ryukyu) Trench. Both multi-channel seismic reflection and ocean bottom seismographic records provide clear images of the rough seafloor topography and irregular P-wave velocity structure of the northwestern extension of the Kyushu-Palau Ridge and Amami Plateau below the landward trench slope. Low velocity (V p ≤ 4–5 km/s) and thick (>7 km) materials above the plate boundary characterize the landward trench slope structure. An exception to this is found where the subducting plate contacts higher velocity (V p > 5 km/s) materials of the landward plate at the estimated position of the seismic asperity of 1968 Hyuganada earthquake (M w 7.5).
Highlights
The Philippine Sea (PHS) plate subducts beneath the Eurasian plate along the Nankai Trough and Nansei-Shoto (Ryukyu) Trench at a rate of about 5 cm/yr (Fig. 1)
P-wave velocity models related to the Philippine Sea plate subduction have been obtained from seismic explorations at the northern end of the Nansei-Shoto (Ryukyu) Trench
We present P-wave velocity models related to the PHS plate subduction in the northernmost Ryukyu Trench region for four profiles (DAr2, DAr5, KPr1 and KPr2 in Fig. 1) among the continental shelf surveys
Summary
The Philippine Sea (PHS) plate subducts beneath the Eurasian plate along the Nankai Trough and Nansei-Shoto (Ryukyu) Trench at a rate of about 5 cm/yr (Fig. 1). P-wave velocity models related to the Philippine Sea plate subduction have been obtained from seismic explorations at the northern end of the Nansei-Shoto (Ryukyu) Trench.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
