Japan Geoscience Union Meeting 2022

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[E] Oral

S (Solid Earth Sciences ) » S-SS Seismology

[S-SS03] Seismological advances in the ocean

Tue. May 24, 2022 10:45 AM - 12:15 PM 301A (International Conference Hall, Makuhari Messe)

convener:Tatsuya Kubota(National Research Institute for Earth Science and Disaster Resilience), convener:Takashi Tonegawa(Research and Development center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology), Yukihiro Nakatani(Nansei-Toko Observatory for Earthquakes and Volcanoes, Research and Education Center for Natural Hazards, Kagoshima University), Chairperson:Shinji Yoneshima(Earthquake Prediction Research Center, Earthquake Research Institute, University of Tokyo), Tatsuya Kubota(National Research Institute for Earth Science and Disaster Resilience)

10:45 AM - 11:00 AM

[SSS03-07] Development of broadband ocean bottom seismology in Japan – A review

★Invited Papers

*Daisuke Suetsugu1, Hajime Shiobara2 (1.institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology, 2.Earthquake Research Institute, The University of Tokyo)

Keywords:Broadband ocean bottom seismometer

A dense broadband seismic network in oceanic regions has been considered as essential for major breakthroughs in Earth sciences, since many phenomena caused by plate tectonics and mantle dynamics studies (e.g., subduction zones, spreading ridges, and hot spots) take place in oceanic regions. The development of broadband ocean-bottom seismometers (BBOBSs) was initiated in the late 1980s. Observations with BBOBSs were implemented in the late 1990s and become a common practice at present. Numerous scientific studies have been conducted and significant data were collected, despite the limited coverage of the observations owing to the vastness of oceanic regions. In this presentation, we review the development of BBOBS instrumentation and scientific achievements in Japan, then discuss future direction of broadband ocean bottom seismology.