Research Institute for Marine Geodynamics (IMG) Research and Development Center for Earthquake and Tsunami Forecasting (FEAT) Earthquake and Tsunami Monitoring Group
Career
Senior Researcher
Profile
Speciality
Research Achievement
Peer reviewed publications (Belonging to JAMSTEC)
Bassett, D., G. Fujie, S. Kodaira, R. Arai, Y. Yamamoto, S. Henrys, D. Barker, A. Gase, H. van Avendonk, N. Bangs, H. Seebeck, B. Tozer, K. Jacobs, T. Luckie, D. Okaya, K. Mochizuki. Heterogeneous Crustal Structure of the Hikurangi Plateau Revealed by SHIRE Seismic Data: Origin and Implications for Plate Boundary Tectonics. GEOPHYSICAL RESEARCH LETTERS, 2023, 50, 22, doi: 10.1029/2023GL105674
Gou Fujie, Shuichi Kodaira, Koichiro Obana, Yojiro Yamamoto, Takeshi Isse, Tomoaki Yamada, Tetsuo No, Yasuyuki Nakamura, Seiichi Miura. The nature of the Pacific plate as subduction inputs to the northeastern Japan arc and its implication for subduction zone processes. Progress in Earth and Planetary Science, 2023, 10, 50, doi: 10.1186/s40645-023-00578-8
Satoru Baba, Eiichiro Araki, Yojiro Yamamoto, Takane Hori, Gou Fujie, Yasuyuki Nakamura, Takashi Yokobiki, Hiroyuki Matsumoto. Observation of shallow slow earthquakes by distributed acoustic sensing using offshore fiber-optic cable in the Nankai Trough, southwest Japan. GEOPHYSICAL RESEARCH LETTERS, 2023, 50, 12, p. e2022GL102678, doi: 10.1029/2022GL102678
Jesse Hutchinson, Honn Kao, Michael Riedel, Koichiro Obana, Kelin Wang, Shuichi Kodaira, Tsutomu Takahashi & Yojiro Yamamoto. Tectonic evolution of the Nootka fault zone and deformation of the shallow subducted Explorer plate in northern Cascadia as revealed by earthquake distributions and seismic tomography. Scientific Reports, 2023, 13, doi: 10.1038/s41598-023-33310-z
Koichiro Obana, Tsutomu Takahashi, Yojiro Yamamoto, Takeshi Iinuma, Yasuyuki Nakamura, Gou Fujie, Seiichi Miura and Shuichi Kodaira. Fault geometry of M6-class normal-faulting earthquakes in the outer trench slope of Japan Trench from ocean bottom seismograph observations. Progress in Earth and Planetary Science, 2023, 10, 1, doi: 10.1186/s40645-023-00541-7
Yojiro Yamamoto, Shuichiro Yada, Keisuke Ariyoshi, Takane Hori and Narumi Takahashi. Seismicity distribution in the Tonankai and Nankai seismogenic zones and its spatiotemporal relationship with interplate coupling and slow earthquakes. Progress in Earth and Planetary Science, 2022, 9, 32, doi: 10.1186/s40645-022-00493-4
Yojiro Yamamoto, Keisuke Ariyoshi, Shuichiro Yada, Masaru Nakano, Takane Hori. Spatio-temporal distribution of shallow very-low-frequency earthquakes between December 2020 and January 2021 in Kumano-nada, Nankai subduction zone, detected by a permanent seafloor seismic network. EARTH PLANETS AND SPACE, 2022, 74, 14, doi: 10.1186/s40623-022-01573-x
Dan Bassett, Adrien Arnulf, Stuart Henrys, Daniel Barker, Harm Van Avendonk, Nathan Bangs, Shuichi Kodaira, Hannu Seebeck, Laura Wallace, Andrew Gase, Thomas Luckie, Katrina Jacobs, Brook Tozer, Ryuta Arai, David Okaya, Kimihiro Mochizuki, Gou Fujie, Yojiro Yamamoto. Crustal structure of the Hikurangi margin from SHIRE seismic data and the relationship between forearc structure and shallow megathrust slip behaviour. GEOPHYSICAL RESEARCH LETTERS, 2022, 49, 2, p. e2021GL096960, doi: 10.1029/2021GL096960
Yojiro Yamamoto, Dogan Kalafat, Ali Pinar, Narumi Takahashi, Remzi Polat, Yoshiyuki Kaneda, Haluk Ozener. Seismic velocity structure along the North Anatolian Fault beneath the Central Marmara Sea and its implication for seismogenesis. GEOPHYSICAL JOURNAL INTERNATIONAL, 2021, 228, 1, p. 396-411, doi: 10.1093/gji/ggab351
Yojiro Yamamoto, Tsutomu Takahashi, Yuka Kaiho, Koichiro Obana, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. Corrigendum to “Seismic structure off the Kii Peninsula, Japan, deduced from passive- and active-source seismographic data” [Earth Planet. Sci. Lett. 461 (2017) 163–175]. EARTH AND PLANETARY SCIENCE LETTERS, 2021, 568, doi: 10.1016/j.epsl.2021.117051
Andrew C Gase, Harm JA Van Avendonk, Nathan L Bangs, Dan Bassett, Stuart A Henrys, Daniel HN Barker, Shuichi Kodaira, Katrina M Jacobs, Thomas W Luckie, David A Okaya, Gou Fujie, Yojiro Yamamoto, Adrien F Arnulf, Ryuta Arai. Crustal structure of the northern Hikurangi margin, New Zealand: Variable accretion and overthrusting plate strength influenced by rough subduction. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2021, 126, 5, p. e2020JB021176, doi: 10.1029/2020JB021176
Koichiro Obana, Gou Fujie, Yojiro Yamamoto, Yuka Kaiho, Yasuyuki Nakamura, Seiichi Miura, Shuichi Kodaira. Seismicity around the trench axis and outer-rise region of the southern Japan Trench, south of the main rupture area of the 2011 Tohoku-oki earthquake. GEOPHYSICAL JOURNAL INTERNATIONAL, 2021, 226, 1, p. 131-145, doi: 10.1093/gji/ggab093
Jesse Hutchinson, Honn Kao, Michael Riedel, Koichiro Obana, Kelin Wang, Shuichi Kodaira, Tsutomu Takahashi, Yojiro Yamamoto. Significant geometric variation of the subducted plate beneath the northernmost Cascadia subduction zone and its tectonic implications as revealed by the 2014 MW 6.4 earthquake sequence. EARTH AND PLANETARY SCIENCE LETTERS, 2020, 551, doi: 10.1016/j.epsl.2020.116569
Yojiro Yamamoto, Dogan Kalafat, Ali Pinar, Narumi Takahashi, Zeynep Coskun, Remzi Polat, Yoshiyuki Kaneda, Haluk Ozener. Fault geometry beneath the western and Central Marmara Sea, Turkey, based on ocean bottom seismographic observations: Implications for future large earthquakes. TECTONOPHYSICS, 2020, 791, doi: 10.1016/j.tecto.2020.228568
Yojiro Yamamoto, Tsutomu Takahashi, Yasushi Ishihara, Koichiro Obana, Seiichi Miura, Shuichi Kodaira, Yoshiyuki Kaneda. Plate geometry model and seismicity in the northern Ryukyu subduction zone, Japan, deduced from amphibious seismic observations. EARTH AND PLANETARY SCIENCE LETTERS, 2020, 536, doi: 10.1016/j.epsl.2020.116143
Yojiro Yamamoto, Ali Pinar, Dogan Kalafat, Narumi Takahashi, Haluk Ozener, Yoshiyuki Kaneda. Comment on “An Alternative View of the Microseismicity along the Western Main Marmara Fault,” by E. Batsi et al. BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, 2020, 110, 1, p. 381-382, doi: 10.1785/0120180317
Andrew C. Gase, Harm J. A. Van Avendonk, Nathan L. Bangs, Thomas W. Luckie, Daniel H. N. Barker, Stuart A. Henrys, Dan Bassett, David A. Okaya, Katrina M. Jacobs, Shuichi Kodaira, Gou Fujie, Adrien F. Arnulf, and Yojiro Yamamoto. Seismic Evidence of Magmatic Rifting in the Offshore Taupo Volcanic Zone, New Zealand. GEOPHYSICAL RESEARCH LETTERS, 2019, 46, 22, p. 12949-12957, doi: 10.1029/2019GL085269
Aki Ito, Takashi Tonegawa, Naoki Uchida, Yojiro Yamamoto, Daisuke Suetsugu, Ryota Hino, Hiroko Sugioka, Koichiro Obana, Kazuo Nakahigashi, Masanao Shinohara. Configuration and structure of the Philippine Sea Plate off Boso, Japan: constraints on the shallow subduction kinematics, seismicity, and slow slip events. EARTH PLANETS AND SPACE, 2019, 71, 111, doi: 10.1186/s40623-019-1090-y
Naoki Uchida, Kalafat Dogan, Pinar Ali, Yojir Yamamoto. Repeating earthquakes and interplate coupling along the western part of the North Anatolian Fault. TECTONOPHYSICS, 2019, 769, doi: 10.1016/j.tecto.2019.228185
K. Mochizuki, R. Sutherland, S. Henrys, D. Bassett, H. Van Avendonk, R. Arai, S. Kodaira, G. Fujie, Y. Yamamoto, N. Bangs and D. Barker. Recycling of depleted continental mantle by subduction and plumes at the Hikurangi Plateau large igneous province, southwestern Pacific Ocean. GEOLOGY, 2019, 47, 8, p. 795-798, doi: 10.1130/G46250.1
Koichiro Obana,Gou Fujie,Tsutomu Takahashi,Yojiro Yamamoto,Takashi Tonegawa,Seiichi Miura,Shuichi Kodaira. Seismic velocity structure and its implications for oceanic mantle hydration in the trench-outer rise of the Japan Trench. GEOPHYSICAL JOURNAL INTERNATIONAL, 2019, 217, 3, p. 1629-1642, doi: 10.1093/gji/ggz099
Ryusuke Yamamoto, Motoyuki Kido , Yusaku Ohta , Narumi Takahashi, Yojiro Yamamoto , Ali Pinar , Dogan Kalafat , Haluk Ozener , and Yoshiyuki Kaneda. Seafloor Geodesy Revealed Partial Creep of the North Anatolian Fault Submerged in the Sea of Marmara. GEOPHYSICAL RESEARCH LETTERS, 2019, 46, 3, p. 1268-1275, doi: 10.1029/2018GL080984
Ayako Nakanishi, Narumi Takahashi, Yojiro Yamamoto, Tsutomu Takahashi, Seckin Ozgur Citak, Takeshi Nakamura, Koichiro Obana, Shuichi Kodaira and Yoshiyuki Kaneda. Three-dimensional plate geometry and P-wave velocity models of the subduction zone in SW Japan: Implications for seismogenesis. Geological Society of America Special Paper, 2018, 534, p. 1-18, doi: 10.1130/2018.2534(04)
Koichiro Obana, Yasuyuki Nakamura, Gou Fujie, Shuichi Kodaira, Yuka Kaiho, Yojiro Yamamoto, Seiichi Miura. Seismicity in the source areas of the 1896 and 1933 Sanriku earthquakes and implications for large near-trench earthquake faults. GEOPHYSICAL JOURNAL INTERNATIONAL, 2018, 212, 3, p. 2061-2072, doi: 10.1093/gji/ggx532
Yojiro Yamamoto, Tsutomu Takahashi, Yasushi Ishihara, Yuka Kaiho, Ryuta Arai, Koichiro Obana, Ayako Nakanishi, Seiichi Miura, Shuichi Kodaira, Yoshiyuki Kaneda. Modeling the Geometry of Plate Boundary and Seismic Structure in the Southern Ryukyu Trench Subduction Zone, Japan, Using Amphibious Seismic Observations. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2018, 123, doi: 10.1002/2017JB015330
Shuichi Kodaira, Yasuyuki Nakamura, Yojiro Yamamoto, Koichiro Obana, Gou Fujie, Tetsuo No, Yuka Kaiho, Takeshi Sato, Seiichi Miura. Depth-varying structural characters in the rupture zone of the 2011 Tohoku-oki earthquake. Geosphere, 2017, doi: https://doi.org/10.1130/GES01489.1
Aki Ito, Yojiro Yamamoto, Ryota Hino, Daisuke Suetsugu, Hiroko Sugioka, Masaru Nakano, Koichiro Obana, Kazuo Nakahigashi, Masanao Shinohara. Tomographic image of crust and upper mantle off the Boso Peninsula using data from an ocean bottom seismograph array. EARTH PLANETS AND SPACE, 2017, 69, 118, doi: 10.1186/s40623-017-0703-6
Yojiro Yamamoto, Narumi Takahashi, Ali Pinar, Dogan Kalafat, Seckin Citak, Mustafa Comoglu, Remzi Polat, Yoshiyuki Kaneda. Geometry and segmentation of the North Anatolian Fault beneath the Marmara Sea, Turkey, deduced from long-term ocean bottom seismographic observations. Journal of Geophysical Research: Solid Earth, 2017, 122, doi: 10.1002/2016JB013608
Yojiro Yamamoto, Tsutomu Takahashi, Yuka Kaiho, Koichiro Obana, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. Seismic structure off the Kii Peninsula, Japan, deduced from passive- and active-source seismographic data. Earth and Planetary Science Letters, 2017, 461, p. 163-175, doi: 10.1016/j.epsl.2017.01.003
Aki Ito, Hiroko Sugioka, Koichiro Obana, Ryota Hino, Daisuke Suetsugu, Kazuo Nakahigashi, Masanao Shinohara, Masaru Nakano, Yojiro Yamamoto. Upper boundaries of the Pacific and Philippine Sea plates near the triple junction off the Boso Peninsula deduced from ocean-bottom seismic observations. Earth, Planets Space, 2017
Aki Ito, Hiroko Sugioka, Koichiro Obana, Ryota Hino, Daisuke Suetsugu, Kazuo Nakahigashi, Masanao Shinohara, Masaru Nakano & Yojiro Yamamoto. Upper boundaries of the Pacific and Philippine Sea plates near the triple junction off the Boso Peninsula deduced from ocean-bottom seismic observations. EARTH PLANETS AND SPACE, 2017, 69, 1, doi: 10.1186/s40623-017-0608-4
Takashi Tonegawa, Koichiro Obana, Yojiro Yamamoto, Shuichi Kodaira, Kelin Wang, Michael Riedel, Honn Kao, and George Spence. Fracture Alignments in Marine Sediments Off Vancouver Island from Ps Splitting Analysis. Bulletin of the Seismological Society of America, 2016, 107, 1, doi: 10.1785/0120160090
Ryuta Arai, Tsutomu Takahashi, Shuichi Kodaira, Yuka Kaiho, Ayako Nakanishi, Gou Fujie, Yasuyuki Nakamura, Yojiro Yamamoto, Yasushi Ishihara, Seiichi Miura & Yoshiyuki Kaneda. Structure of the tsunamigenic plate boundary and low-frequency earthquakes in the southern Ryukyu Trench. Nature Communications, 2016, 7, doi: 10.1038/ncomms12255
Yojiro Yamamoto, Narumi Takahashi, Seckin Citak, Dogan Kalafat, Ali Piner, Cemil Gurbuz, Yoshiyuki Kaneda. Offshore seismicity in the western Marmara Sea, Turkey, revealed by ocean bottom observation. Earth Planets Space, 2015, 67, 147, doi: 10.1186/s40623-015-0325-9
Koichiro Obana, Martin Scherwath, Yojiro Yamamoto, Shuichi Kodaira, Kelin Wang, George Spence, Michael Riedel, Honn Kao. Earthquake activity in northern Cascadia subduction zone off Vancouver Island revealed by ocean bottom seismograph observations. Bulletin of the Seismological Society of America, 2014, 105, 1, p. 489-495, doi: 10.1785/0120140095
Tsutomu Takahashi, Koichiro Obana, Yojiro Yamamoto, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. S-wave attenuation structure on the western side of the Nankai subduction zone: implications for fluid distribution and dynamics. Journal of Geophysical Research: Solid Earth, 2014, 119, p. 7805-7822, doi: 10.1002/2014JB011103
Yasuyuki Nakamura, Shuichi Kodaira, Becky J Cook, Tamara Jeppson, Takafumi Kasaya, Yojiro Yamamoto, Yoshitaka Hashimoto, Mika Yamaguchi, Koichiro Obana and Gou Fujie. Seismic imaging and velocity structure around the JFAST drill site in the Japan Trench: low Vp, high Vp/Vs in the transparent frontal prism. EARTH PLANETS AND SPACE, 2014, 66, 121, doi: 10.1186/1880-5981-66-121
Yojiro Yamamoto, Koichiro Obana, Tsutomu Takahashi, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. Seismicity and structural heterogeneities around the western Nankai Trough subduction zone, southwestern Japan. Earth and Planetary Science Letters, 2014, 396, p. 34-45, doi: 10.1016/j.epsl.2014.04.006
Koichiro Obana, Shuichi Kodaira, Yasuyuki Nakamura, Takeshi Sato, Gou Fujie, Tsutomu Takahashi, Yojiro Yamamoto. Aftershocks of the December 7, 2012 intraplate doublet near the Japan Trench axis. Earth, Planets and Space, 2014, 66, p. 24, doi: 10.1186/1880-5981-66-24
Yojiro Yamamoto, Koichiro Obana, Shuichi Kodaira, Ryota Hino, Masanao Shinohara. Structural heterogeneities around the megathrust zone of the 2011 Tohoku earthquake from tomographic inversion of onshore and offshore seismic observations. Journal of Geophysical Research, 2014, 119, doi: 10.1002/2013JB010582
Yasuyuki Nakamura, Koichiro Obana, Shuichi Kodaira, Yojiro Yamamoto, Gou Fujie, Seiichi Miura and Narumi Takahashi. Seismic survey using Ultra-Deep OBS in the Japan Trench axis area. The 11th SEGJ International Symposium, 2013
Tsutomu Takahashi, Koichiro Obana, Yojiro Yamamoto, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. The 3-D distribution of random velocity inhomogeneities in southwestern Japan and the western part of the Nankai subduction zone. Journal of Geophysical Research: Solid Earth, 2013, 118, p. 2246-2257, doi: 10.1002/jgrb.50200
Yojiro Yamamoto, Koichiro Obana, Tsutomu Takahashi, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. Imaging of the subducted Kyushu-Palau Ridge in the Hyuga-nada region, western Nankai Trough subduction zone. Tectonophysics, 2013, 589, p. 90-102, doi: 10.1016/j.tecto/2012.12.028
Kensuke Suzuki, Ryota Hino, Yoshihiro Ito, Yojiro Yamamoto, Syuichi Suzuki, Hiromi Fujimoto, Masanao Shinohara, Masao Abe, Yoshiharu Kawaharada, Yohei Hasegawa, and Yoshiyuki Kaneda. Seismicity near the hypocenter of the 2011 off the Pacific coast of Tohoku earthquake deduced by using Ocean Bottom Seismographic data. Earth Planets Space, 2013, 64, 12, p. 1125-1135, doi: 10.5047/eps.2012.04.010
Goto Hiroyuki, Yamamoto Yojiro, Kita Saeko. Dynamic rupture simulation of the 2011 off the Pacific coast of Tohoku Earthquake: Multi-event generation within dozens of seconds. Earth Platets Space, 2013, 64, 12, p. 1167-1175
Koichiro Obana, Gou Fujie, Tsutomu Takahashi, Yojiro Yamamoto, Yasuyuki Nakamura, Shuichi Kodaira, Narumi Takahashi, Yoshiyuki Kaneda, Masanao Shinohara. Normal-faulting earthquakes beneath the outer slope of the Japan Trench after the 2011 Tohoku earthquake: Implications for the stress regime in the incoming Pacific plate. Geophysical Research Letters, 2012, 39, doi: 10.1029/2011GL050399
Yamamoto Y., R. Hino, and M. Shinohara. Mantle wedge structure in the Miyagi Prefecture forearc region, central northeastern Japan arc, and its relation to corner-flow pattern and interplate coupling. Journal of Geophysical Research, 2011, 116, B10310, doi: doi:10.1029/2011JB008470
Hino R., R. Azuma, Y. Ito, Y. Yamamoto, K. Suzuki, H. Tsushima, S. Suzuki, M. Miyashita, T. Tomori, M. Arizono, G. Tange. Insight into complex rupturing of the immature bending normal fault in the outer slope of the Japan Trench from aftershocks of the 2005 Sanriku earthquake (Mw = 7.0) located by ocean bottom seismometry. Geochem. Geophys. Geosyst., 2009, 10, doi: 10.1029/2009GC002415
Yojiro Yamamoto, Ryota Hino, Kensuke Suzuki, Yoshihiro Ito, Tomoaki Yamada, Masanao Shinohara, Toshihiko Kanazawa, Gen Aoki, Masayuki Tanaka, Kenji Uehira, Gou Fujie, Yoshiyuki Kaneda, Tetsuo Takanami, Toshinori Sato. Spatial heterogeneity of the mantle wedge structure and interplate coupling in the NE Japan forearc region. Geophys. Res. Lett., 2008
Peer reviewed publications (Not belonging to JAMSTEC)
Yojiro Yamamoto, Ryota Hino, Minoru Nishino, Tomoaki Yamada, Toshihiok Kanazawa, Tetsuo Hashimoto, Gen Aoki. Three-dimensional seismic velocity structure around the focal area of the 1978 Miyagi-Oki earthquake. Geophysical Research Letters, 2006, 33, doi: doi:10.1029/2005GL025619
Invited oral presentation(Belonging to JAMSTEC)
Gou Fujie, Shuichi Kodaira, Koichiro Obana, Yuka Kaiho, Yojiro Yamamoto, Tsutomu Takahashi, Tomoaki Yamada. Plate bending-related faulting just prior to subduction and subduction zone seismicity in NE Japan. JpGU 2017, 2017
Ayako NAKANISHI, Mikiya YAMASHITA , Yojiro YAMAMOTO , Gou FUJIE , Seiichi MIURA, Shuichi KODAIRA, Yoshiyuki KANEDA , Nobukazu Seama. Along-trough variation in the seismic structure of the incoming Philippine Sea plate just seaward of the Nankai Trough. JpGU-AGU Joint Meeting 2017, 2017
Koichiro Obana, Gou Fujie, Shuichi Kodaira, Tsutomu Takahashi, Yojiro Yamamoto, Takeshi Sato, Mikiya Yamashita, Yuka Kaiho, Yasuyuki Nakamura, Seiichi Miura. Seismicity and its relation to the bending-related faults in the incoming Pacific Plate along the Japan Trench. Japan Geoscience Union Meeting 2016, 2016, SIT12-02
Koichiro Obana, Gou Fujie, Yasuyuki Nakamura, Tsutomu Takahashi, Yojiro Yamamoto, Yuka Kaiho, Seiichi Miura, Shuichi Kodaira and Masanao Shinohara. Intra-plate seismicity and structure heterogeneity of incoming/subducting Pacific plate along the Japan trench based on the ocean bottom seismograph observations. AGU Fall Meeting 2018, 2018
Dan Bassett, Stuart A Henrys, Daniel H N Barker, Adrien F Arnulf, Ryuta Arai, Shuichi Kodaira, Harm J Van Avendonk, Nathan L Bangs, Gou Fujie, Yojiro Yamamoto, Koichiro Obana, Jess Irene Tsahai Hillman. The relationship between forearc structure and geodetic locking along the Hikurangi margin from SHIRE seismic data. AGU Fall Meeting 2018, 2018
D Bassett, S Henrys, D Barker, A Arnulf, R Arai, S Kodaira, H van Avendonk, N Bangs, G Fujie, Y Yamamoto, K Obana, J Hillman & SHIRE Team. The Relationship between Forearc Structure and Geodetic Locking along the Hikurangi Margin from SHIRE Seismic Data. New Zealand Geosciences 2018, 2018
R. Arai, S. Kodaira, T. Takahashi, Y. Yamamoto, S. Miura, Y. Kaneda. Structural controls on slip behaviours in the Ryukyu subduction zone. SEISMIX2018, 2018, T.I.4
Koichiro OBANA, Gou FUJIE, Yasuyuki NAKAMURA, Tsutomu TAKAHASHI, Takashi TONEGAWA, Yojiro YAMAMOTO, Yuka KAIHO, Seiichi MIURA, Shuichi KODAIRA. Seismic Velocity Variations in the Uppermost Oceanic Mantle of the Incoming Pacific Plate along the Japan Trench. AOGS 2018, 2018
Koichiro Obana, Gou Fujie, Yasuyuki Nakamura, Tsutomu Takahashi, Yojiro Yamamoto, Yuka Kaiho, Seiichi Miura, Yasushi Ishihara, Shuichi Kodaira, Masanao Shinohara. Distribution of Intra-plate seismicity in trench-outer rise region along the Japan Trench based on ocean bottom seismograph observations. 日本地球惑星科学連合2018年大会, 2018
Pinar Ali, Coskun Zeynep, Kalafat Dogan, Yamamoto Yojiro, Takahashi Narumi, Citak Sekcin, Polat Remzi, Turhan Faith, Kaneda Yoshiyuki, Ozner Haluk. Long-Term OBS Observations in the Sea of Marmara, Northwest Turkey. 2018 Seismology of the Americas Meeting, 2018
Ryusuke Yamamoto , Motoyuki Kido , Yusaku Ohta , Narumi Takahashi , Yojiro Yamamoto , Dogan Kalafat , Ali Pinar , Haluk Ozener , Sinan Ozeren , Yoshiyuki Kaneda. Slip rate of the North Anatolian Fault at the western part of the Sea of Marmara through seafloor geodetic measurement for two years. IAG-IASPEI 2017, 2017
Koichiro Obana, Gou Fujie, Tsutomu Takahashi, Takashi Tonegawa, Yojiro Yamamoto, Shuichi Kodaira, Masanao Shinohara,. Structure of the incoming/subducting Pacific Plate in the central part of the Japan Trench: Results from repeated ocean bottom seismograph observations. IAG-IASPEI 2017, 2017
市原 寛、橋本 順歩、高橋 大和、清水 賢、佐野 守、松野 哲男、島 伸和、山本 揚二朗、井和丸 光、中東 和夫、若林 伸和、小平 秀一、巽 好幸. Integrated offshore investigations in the vicinity of Kikai Caldera, southwestern Japan —towards a comprehensive understanding of destructive caldera eruptions—. JpGU-AGU Joint Meeting 2017, 2017
Koichiro Obana, Gou Fujie, Tsutomu Takahashi, Takashi Tonegawa, Yojiro Yamamoto, Shuichi Kodaira, Masanao Shinohara. Structure of the incoming Pacific Plate subducting into the central part of the Japan Trench: Results from the repeated ocean bottom seismograph observations after the 2011 Tohoku-Oki earthquake. JpGU-AGU Joint Meeting 2017, 2017, SCG67-03
Zeynep Coskun, Yojiro Yamamoto, Esra Kalkan Ertan, Ali Pinar, Dogan Kalafat, Narumi Takahashi, Seckin Citak,Yoshiyuki Kaneda. Focal Mechanisms in the Sea of Marmara Derived from First Motion Polarities of OBS and Nearby Land Stations. EGU 2017, 2017
Koichiro OBANA, Gou Fujie, Shuichi Kodaira, Tsutomu Takahashi, Yojiro Yamamoto, Seiichi Miura, Masanao Shinohara. Seismic velocity structure of the incoming Pacific Plate subducting into the central part of the Japan Trench revealed by traveltime tomography using OBS data. American Geophysical Union, 2016 Fall meeting, 2016
山本龍典, 木戸元之, 太田雄策, 高橋成実, 山本揚二朗, Dogan Kalafat, Ali Pinar,Haluk Ozener, Sinan Ozeren, 金田義行. 海底測地観測によるトルコ・マルマラ海での北アナトリア断層のすべり欠損量検出及び陸上GNSS データを併せた断層モデル推定. 日本測地学会第126回講演会, 2016, 28
Koichiro Obana, Gou Fujie, Shuichi Kodaira, Tsutomu Takahashi, Yojiro Yamamoto, Takeshi Sato, Mikiya Yamashita, Yuka Kaiho,Yasuyuki Nakamura, Seiichi Miura. Seismicity and its relation to the bending-related faults in the incoming Pacific Plate along the Japan Trench. Bend-Fault serpentinization (BFS+H-ODIN) workshop, 2016
Koichiro Obana, Yasuyuki Nakamura, Yuka Kaiho, Yojiro Yamamoto, Shuichi Kodaira, Gou Fujie. Seismicity observations in the source region of the 1896 Meiji-Sanriku and 1933 Showa-Sanriku Earthquakes. Japan Geoscience Union Meeting 2016, 2016, SSS02-14
Ali Pinar, Yojiro Yamamoto, Mustafa Comoglu, Remzi Polat, Fatih Turhan, Narumi Takahashi, Dogan Kalafat, Seckin Citak. Fault Characterization in the Sea of Marmara (Turkey) Using OBS and Land Seismic Stations. EGU general Assembly 2016, 2016
K. Obana, G. Fujie, S. Kodaira, T. Takahashi, Y. Yamamoto, T. Sato, M. Yamashita, Y. Nakamura, S. Miura. Seismicity and Structure of the Incoming Pacific Plate Subducting into the Japan Trench off Miyagi. American Geophysical Union, 2015 Fall meeting, 2015, T43G-01
Koichiro Obana, Shuichi Kodaira, Yojiro Yamamoto, Tsutomu Takahashi (JAMSTEC), Kelin Wang, Michael Riedel, Honn Kao (Geological Survey of Canada),Martin Scherwath, George Spence, Jesse Hutchinson, Ayodeji Paul Kuponiyi (University of Victoria), Michael Bostock. SeaJade Earthquake Observations in Cascadia Subduction Zone off Vancouver Island. Amphibious Array Facility Workshop, 2014
Tsutomu Takahashi, Koichiro Obana, Yojiro Yamamoto, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. S-wave attenuation on the western side of Nankai subduction zone: implications for geofluid distribution and dynamics. 日本地球惑星科学連合2014年大会, 2014
Tsutomu Takahashi, Koichiro Obana, Yojiro Yamamoto, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. S-WAVE ATTENUATION STRUCTURE ON THE WESTERN SIDE OF NANKAI SUBDUCTION ZONE: IMPLICATIONS FOR GEOFLUID DISTRIBUTION AND DYNAMICS. Geofluid 3, 2014
KODAIRA SHUICHI, KANEDA YOSHIYUKI , SATO TAKESHI , YAMAMOTO YOJIRO , FUJIE GO , OBANA KOICHIRO , TAKAHASHI TSUTOMU , TAKAHASHI NARUMI , NAKANISHI AYAKO. Active-passive integrated seismic study toward constructing a 3-D plate boundary model of the Nankai seismogenic zone, Japan. IUGG, 2011
S. Kodaira, G. Fujie, N. Noguchi, M. Yamashita, T. Sato, T. Takahashi, N. Takahashi, Y. Yamamoto, Y. Kaiho (JAMSTEC), Azusa Nishizawa (Hydrographic and Oceanographic Dep. JCG). 海洋最上部マントル超高速度層. 日本地震学会2010年度秋季大会, 2011
Shuichi Kodaira, Gou Fujie, Mikiya Yamashita, Naoto Noguchi, Takeshi Sato, Tsutomu Takahashi, Yuka Kaiho, Yojiro Yamamoto, Narumi Takahashi. New seismic images in the NW Pacific and its implications for tectono-magmatic processes at paleo-fast-spreading ridge. 2010 AGU Fall Meeting, 2010
Ayako NAKANISHI,Shuichi KODAIRA,Gou Fujie,Koichiro OBANA,Tsutomu TAKAHASHI,Yojiro TAMAMOTO,Takeshi SATO,Kazuhiko KASHIWASE,Hidetoshi Fujimori,Yoshiyuki KANEDA. Geometry of the Philippine Sea plate subducting beneath the southwestern Nankai seismogenic zone. American Geophysical Union 2010 Fall Meeting, 2010
Y. Yamamoto, K. Obana, T. Takahashi, A. Nakanishi, S. Kodaira, Y. Kaneda. Difference of the seismic structure between the Hyuga-nada and the Nankai seismogenic segments. AGU Fall Meeting, 2010
Y. Yamamoto, K. Obana, T. Takahashi, A. Nakanishi, S. Kodaira, Y. Kaneda. Seismicity and seismic velocity structure in the Hyuga-nada region. SSJ Fall Meeting 2010, 2010
Y. Yamamoto, K. Obana, T. Takahashi, S. Kodaira, G. Fujie, A. Nakanishi, K. Takizawa, K. Kashiwase, Y. Kaneda. Deep structure of the Philippine Sea slab subducted in the Hyuga-nada region. 2010 JpGU, 2010
Y. Yamamoto, R. Hino ,M. Shinohara,G. Fujie, S. Miura, S. Kodaira. Seismic velocity structure and seismicity in the forearc region of the Miyagi Prefecture. 2009年日本地震学会秋季大会, 2009
Yojiro Yamamoto, Ryota Hino, Masanao Shinohara, Gou Fujie, Seiichi Miura, Shuichi Kodaira. Seismic velocity structure and depth variation of the plate boundary around the focal area of the off-Miyagi earthquake. JPGU Meeting 2009, 2009
Y. Ito, H. Fujimoto, R. Hino, M. Kido, Y. Osada, Y. Yamamoto, S. Suzuki, R. Azuma, H. Tsushima, K. Suzuki, T. Tsuji, N. Nakayama, J. Ashi, T. Gamo. Seismological, geodetical, and cold-seepage observations for detection of slow earthquakes on the landward slope of Japan Trench -Preliminary report for YK08-06. Asia Seismological Commission, Tsukuba, 2008
Gou Fujie, S. Miura, S. Kodaira, Y. Kaneda, A. Ito, M. Shinohara, K. Mochizuki, T. Yamata, I. Watanabe, T. Kanazawa, R. Hino, M. Nishino, A. Kuwano, Y. Yamamoto Y. Murai, I. Saito, T. Takanami, Y. Machida, Y. Makino, C. Ishimura, Y. Ota, H. Tomoda, T. Sato, K. Uehira. 宮城県沖地震の震源域と地殻構造- 2004年エアガン・OBS構造探査 -. 日本地震学会2005年度秋季大会, 2005
Hiroyuki Tomoda, Toshinori Sato, Junzo Kasahara, Kimihiro Mochizuki, Ryota Hino, Kenji Uehira, Yojiro Yamamoto, Toyotaro Takeda, Yusuke Ota, Toshihiko Kanazawa, Shuichi Kodaira, Seiichi Miura, Alex Smith, Takeshi Sato, Yoshiyuki Kaneda, Kiyoshi Suyehiro. Seismic structure sruvey in the region of the 1994 Off-Sanriku Earthquake. 日本地震学会2005年度秋季大会, 2005
Gou Fujie, S. Miura, S. Kodaira, Y. Kaneda, A. Ito, M. Shinohara, K. Mochizuki, T. Yamata, I. Watanabe, T. Kanazawa, R. Hino, M. Nishino, A. Kuwano, Y. Yamamoto Y. Murai, I. Saito, T. Takanami, Y. Machida, Y. Makino, C. Ishimura, Y. Ota, H. Tomoda, T. Sato, K. Uehira. 宮城県沖地震震源域付近におけるエアガン-OBS構造探査. 地球惑星科学関連学会2005年合同大会, 2005
新井隆太・小平秀一・藤江剛・尾鼻浩一郎・山本揚二朗・三浦誠一(海洋研究開発機構)・望月公廣(東大地震研)・仲谷幸浩(鹿児島大)・Stuart Henrys・Dan Barker・Richard Kellett・ Dan Bassett (GNS Science) ・Nathan Bangs・Harm van Avendonk (Univ. Texas). ニュージーランドヒクランギ沈み込帯における地震波構造探査・自然地震観測. ブルーアースサイエンス・テク2019, 2019
Kimihiro Mochizuki, Stuart A Henrys, Rupert Sutherland, David A Okaya, Tomoaki Yamada, Masanao Shinohara, Takaya Iwasaki, Hiroshi Sato, Ryuta Arai, Gou Fujie, Yojiro Yamamoto, Yukihiro Nakatani, Shuichi Kodaira, Daniel H N Barker, Dan Bassett, Harm J Van Avendonk, Nathan L Bangs. Subduction structure of the Hikurangi Plateau, from travel-time inversion of OBS data, offshore of the Wellington region, the southern North Island, New Zealand. AGU Fall Meeting 2018, 2018
Gou Fujie, Shuichi Kodaira, Koichiro Obana, Yuka Kaiho, Takeshi Sato, Yojiro Yamamoto, Tsutomu Takahashi, Seiichi Miura, Tomoaki Yamada. Regional variations in the nature of the incoming plate and its implication to the subduction zone. EGU General Assembly 2017, 2017
Yojiro Yamamoto, Narumi Takahashi, Ali Pinar, Dogan Kalafat, Seckin Citak, Mustafa Comoglu, Remzi Polat, Yoshiyuki Kaneda. Geometry and segmentation of the North Anatolian Fault beneath the Marmara Sea, Turkey, deduced from long-term ocean bottom seismographic observations. EGU 2017, 2017
Motoyuki Kido, Ryusuke Yamamoto, Yusaku Ohta, Narumi Takahashi, Yojiro Yamamoto, Dogan Kalafat, Ali Pinar, Haluk Ozener, Sinan Ozeren,Yoshiyuki Kaneda. Seafloor geodetic survey revealed partial creep of North Anatolian Fault at the western part of the Sea of Marmara, Turkey. EGU 2017, 2017
Ryusuke Yamamoto, Motoyuki Kido,Yusaku Ohta,Narumi Takahashi,Yojiro Yamamoto,Dogan Kalafat,Ali Pinar,Haluk Ozener,Sinan Ozeren,Kaneda Yoshiyuki. Estimating slip deficit of the North Anatolian Fault beneath the Sea of Marmara, Turkey, using on- and off-shore geodetic data. AGU Fall Meeting 2016, 2016, G51A-1061
Ayako NAKANISHI , Yojiro YAMAMOTO, Mikiya YAMASHITA, Gou FUJIE , Seiichi MIURA, Shuichi KODAIRA, Yoshiyuki KANEDA. Heterogeneous Structure in the incoming Philippine Sea plate along the southwestern Nankai Trough. American Geophysical Union Fall Meeting2016, 2016
Yojiro Yamamoto, Tsutomu Takahashi, Yasushi Ishihara, Yuka Kaiho, Ryuta Arai, Ayako Nakanishi, Koichiro Obana, Seiichi Miura, Shuichi Kodaira, Yoshiyuki Kaneda. Geometry of plate boundary and seismic structure beneath the southern Ryukyu Trench subduction zone deduced from passive seismic observation. AGU Fall Meeting 2016, 2016, T31D-2928
Ayako NAKANISHI, Yojiro YAMAMOTO, Mikiya YAMASHITA, Gou FUJIE , Seiichi MIURA ,Shuichi KODAIRA, Yoshiyuki KANEDA. Structural variation of the incoming Philippine Sea plate along the Nankai Trough off Shikoku. Japan Geoscience Union Meeting 2016, 2016
Yojiro Yamamoto, Narumi Takahashi, Ali Pinar, Dogan Kalafat, Seckin Citak, Mustafa Comoglu, Remzi Polat, Ozkan Cok, Zafer Ogutcu, Murat Suvarikli, Suleyman Tunc, Cemil Gurbuz, Fatih Turhan, Nurcan Ozel, Yoshiyuki Kaneda. Detailed spatial distribution of microearthquakes beneath the Marmara Sea, Turkey, deduced from long-term ocean bottom observation. EGU general Assembly 2016, 2016
Motoyuki Kido, Narumi Takahashi, Yojiro Yamamoto, Dogan Kalafat, Ali Pinar, Sinan Ozeren , Yusaku Ohta, Yoshiyuki Kaneda. Development of a geodetic monitoring system using seafloor extensometers for the state of the submerged North Anatolian Fault in the Sea of Marmara. EGU General Assembly 2015, 2015, EGU2015-9326
Yojiro YAMAMOTO, Narumi TAKAHASHI, Seckin CITAK, Doǧan KALAFAT, Ali PINAR, Cemil GÜRBÜZ, Yoshiyuki KANEDA. Offshore seismicity in the western Marmara Sea, Turkey, revealed by ocean bottom observation. EGU General Assembly 2015, 2015, EGU2015-1876
尾鼻浩一郎・小平秀一・山本揚二朗・高橋努・利根川貴志(海洋研究開発機構),Kelin Wang, Michael Riedel, Honn Kao(Geological Survey of Canada)Martin Scherwath, George Spence, Jesse Hutchinson, Ayodeji Paul Kuponiyi (University of Victoria) 寺田育正・西條暁里(日本海洋事業株式会社). SeaJade:カナダ・カスカディア地震発生帯における海底地震観測. Blue Earth 2015, 2015
高橋努・海宝由佳・石原靖・山本揚二朗・仲西理子・尾鼻浩一郎・ 小平秀一・金田義行. 南部琉球弧における地震活動とランダム速度不均質構造. Blue Earth 2015, 2015
Tsutomu Takahashi, Koichiro Obana, Yojiro Yamamoto, Yuka Kaiho, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. Transdimensional imaging of random velocity inhomogeneities in Nankai subduction zone. 2014 AGU Fall Meeting, 2014
Ayako NAKANISHI, Yojiro YAMAMOTO, Mikiya YAMASHITA, Hikaru IWAMRU, Gou FUJIE, Shuichi KODAIRA, Yoshiyuki KANEDA. Structural variation in the incoming Philippine Sea plate along the Nankai Trough. 2014 AGU Fall Meeting, 2014
Yojiro YAMAMOTO, Narumi TAKAHASHI, Seckin CITAK,Doǧan KALAFAT, Ali PINAR, Cemil GÜRBÜZ, Yoshiyuki KANEDA. Offshore Seismic Observation in the Western Marmara Sea, Turkey. AGU 2014 Fall Meeting, 2014
Takashi Tonegawa, Koichiro Obana, Yojiro Yamamoto, Shuichi Kodaira, Kelin Wang, Michael Riedel, Honn Kao, George Spence. Shear wave anisotropy within marine sediments in the Cascadia subduction zone derived from Ps converted waves. Amphibious Array Facility Workshop, 2014
Ayako NAKANISHI, Narumi TAKAHASHI, Yojiro YAMAMOTO, Tsutomu TAKAHASHI, Koichiro OBANA, Shuichi KODAIRA, Yoshiyuki KANEDA. Three-dimensional velocity model for the Nankai Trough seismogenic zone based on structural studies. 日本地球惑星科学連合2014年大会, 2014
Koichiro Obana, Shuichi Kodaira, Tsutomu Takahashi, Yojiro Yamamoto, Yasuyuki Nakamura, Tetsuo No, Gou Fujie, Ryota Hino, Masanao Shinohara. Seismicity and state of stress near the Japan Trench axis off Miyagi, northeast Japan, after the 2011 Tohoku-Oki earthquake. AGU fall meeting 2013, 2013, T31G-2590
Tsutomu Takahashi, Koichiro Obana, Yojiro Yamamoto, Yuka Kaiho, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. S-wave attenuation structure around the western part of Nankai subduction zone. 日本地球惑星科学連合2013年大会, 2013
Y. Yamamoto, K. Obana, Y. Machida, K. Nakahigashi, M. Shinohara, K. Suzuki, Y. Ito, R. Hino, S. Kodaira, Y. Kaneda, Y. Murai, T. Sato, K. Uehira, H. Yakiwara, K. Hirata 002295, H. Tsushima, A. Yamazaki, H. Sugioka A. Ito, D. Suetsugu. Structural heterogeneities around the shallow megathrust zone of the 2011 Tohoku earthquake deduced from onshore and offshore seismic observations. 日本地球惑星科学連合 2013年連合大会, 2013
NAKANISHI AYAKO, SHIMOMURA NORIO, KODAIRA SHUICHI , OBANA KOICHIRO, TAKAHASHI TSUTOMU, YAMAMOTO YOJIRO, YAMASHITA MIKIYA , TAKAHASHI NARUMI, KANEDA YOSHIYUKI. Three-dimensional model of plate geometry and velocity model for Nankai Trough seismogenic zone based on results from structural studies. 2012 AGU Fall Meeting, 2012
Tsutomu Takahashi, Koichiro Obana, Yojiro Yamamoto, Yuka Kaiho, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. Three-dimensional distribution of random velocity inhomogeneities at the Nankai trough seismogenic zone. 2012 AGU Fall Meeting, 2012
山本揚二朗・尾鼻浩一郎(海洋機構)・町田祐弥・中東和夫・篠原雅尚(東大震研)・鈴木健介・伊藤喜宏・日野亮太(東北大)・小平秀一・金田義行(海洋機構)・ 村井芳夫(北大)・佐藤利典(千葉大)・植平賢司(防災科研)・八木原寛(鹿大)・平田賢治(気象研)・杉岡裕子・伊藤亜妃・末次大輔. Seismic velocity structure around the shallow megathrust zone of the 2011 Tohoku earthquake deduced from onshore and offshore seismic observations. AGU Fall Meeting 2012, 2012
尾鼻浩一郎,藤江 剛,高橋 努,山本揚二朗,中村恭之,高橋成実,小平秀一,金田義行. 2011年東北地方太平洋沖地震に伴う海溝海側斜面の正断層地震. Blue Earth’12, 2012, BE12-P29
Fujiwara Toshiya, Kodaira Shuichi, No Tetsuo, Kaiho Yuka, Fujie Gou, Nakamura Yasuyuki, Takahashi Tsutomu, Yamamoto Yojiro, Takahashi Narumi, Kido Yukari, Kaneda Yoshiyuki. Co-seismic displacement of the 11 March 2011 Tohoku-Oki Earthquake detected by differential multi-narrow beam bathymetric survey. American Geophysical Union Fall Meeting, 2011
Seismic velocity structure in the western part of Nankai subduction zone. AGU Fall Meeting 2011, 2011
Ayako Nakanishi,Norio Shimomura,Shuichi Kodaira,Koichiro Obana, Tsutomu Takahashi,Yojiro Yamamoto,Takeshi Sato,Kazuhiko Kashiwase,Hidetoshi Fujimori,Yoshiyuki Kaneda,Kimihiro Mochizuki,Aitaro Kato,Takashi Iidaka,Eiji Kurashimo,Masanao Shinohara,Tetsuya Takeda,Katsuhiko Shiomi. Structural variation along the southwestern Nankai seismogenic zone related to various earthquake phenomena. 2011 AGU Fall Meeting, 2011
Tsutomu Takahashi, Koichiro Obana, Yojiro Yamamoto, Ayako Nakanishi, Shuichi Kodaira, Yoshiyuki Kaneda. Spatial distribution of random velocity inhomogeneities in the western part of Nankai subduction zone. AGU Fall Meeting 2011, 2011