JpGU-AGU Joint Meeting 2017

Presentation information

[JJ] Oral

S (Solid Earth Sciences) » S-SS Seismology

[S-SS16] [JJ] Crustal Structure

Wed. May 24, 2017 1:45 PM - 3:15 PM 103 (International Conference Hall 1F)

convener:Yasuhira Aoyagi(Central Research Institute of Electric Power Industry), Gokul Kumar Saha(Indian Institute of Science Education and Research,Pune), Chairperson:Toshihiro Igarashi(Earthquake Research Institute, University of Tokyo), Chairperson:Katsuhiko Shiomi(National Research Institute for Earth Science and Disaster Resilience)

3:00 PM - 3:15 PM

[SSS16-06] Seismic structure beneath Ryukyu arc, Japan, inferred from S-wavevector receiver functions

*Takumi Murakoshi1, Hiroshi Takenaka2, Masanao Komatsu2, Nobuyuki Yamada3 (1.National Defense Academy, 2.Okayama University, 3.University of Teacher Education Fukuoka)

Keywords:reciever function, Ryukyu arc, crustal structure

This study describes the seismic images of the crust and uppermost mantle beneath the Ryukyu arc, Japan by using S-wavevector receiver function (SWV-RF) analysis at virtual subsurface receivers. The SWV-RF has a great advantage that the problem of unclearly seismic images beneath very thick sedimentary basin due to the records include strong effect of reverberation within the sedimentary layer can be overcome (Takenaka and Murakoshi, 2010, AGU). In this study, we applied the SWV-RFs from broadband seismic records of the F-net (NIED) and ETOS (JMA) to obtain the seismic images of Moho and subducted Philippine Sea plate beneath the Ryukyu arc, Japan. In this presentation, we will show the estimated seismic structure beneath the Ryukyu arc, which is derived from the depth-converted SWV-RFs.

Acknowledgement: We have used F-net data (NIED), ETOS data (JMA) and deep subsurface structure model by J-SHIS (NIED).