Researcher Information
researchmap URL
Research History
- Apr. 2022 - Present
Japan Agency for Marine-Earth Science and Technology, Research Institute for Marine Geodynamic, Principal Researcher - Apr. 2011
Japan Agency for Marine-Earth Science and Technology, 地球内部ダイナミクス領域, 主任研究員 - Apr. 2004
Japan Agency for Marine-Earth Science and Technology, 研究員 - Apr. 1999
海洋科学技術センター, 研究員
Research activity information
Papers
- Takeshi Akuhara; Masanao Shinohara; Tomoaki Yamada; Ryosuke Azuma; Ryota Hino; Koichiro Obana; Tsutomu Takahashi; Gou Fujie; Shuichi Kodaira; Yoshio Murai; Hisatoshi Baba; Yusuke Yamashita; Hiroshi Yakiwara
Non-double-couple components of the 2024 Noto earthquake aftershocks: influence on focal mechanism estimation
Earth, Planets and Space, 25 Sep. 2025
77, 1 - Yue Sun; Ayumu Miyakawa; Koichiro Obana; Ehsan Jamali Hondori; Jin-Oh Park
Normal faults geometry and slip tendency in the outer-rise of the Japan Trench
Progress in Earth and Planetary Science, 12 Aug. 2025 - Xin Liu; Ayako Nakanishi; Gou Fujie; Takashi Tonegawa; Yasuyuki Nakamura; Koichiro Obana; Shuichi Kodaira
Abundant fluids in southern Kumano Basin linked to fluid source and slow earthquakes at the plate boundary in the Nankai Trough
Proceedings of the National Academy of Sciences, 08 Aug. 2025
122, 32 - Ryosuke Azuma; Ryota Hino; Gou Fujie; Koichiro Obana; Yusaku Ohta; Shuichi Kodaira
Seismic Structure Characterizing the Large Shallow Slip Zone of the 17th‐Century Kuril Earthquake
Journal of Geophysical Research: Solid Earth, May 2025 - Koichiro Obana; Aki Ito; Toshiya Fujiwara; Masayuki Obayashi; Kentaro Imai; Yasuyuki Nakamura; Kenta Yoshida; Noriko Tada; Tomoya Nakajima; Hiroyuki Matsumoto; Gou Fujie; Satoru Tanaka; Shigeaki Ono; Shuichi Kodaira
Earthquake activity in the Torishima Rift and Sofu Seamount, and its relationship to the October 2023 tsunamis in Japan
Earth, Planets and Space, 28 Apr. 2025 - Masanao SHINOHARA; Ryota Hino; Tsutomu Takahashi; Koichiro Obana; Shuichi Kodaira; Ryosuke Azuma; Tomoaki Yamada; Takeshi Akuhara; Yusuke Yamashita; Eiji Kurashimo; Yoshio Murai; Takehi lsse; Kazuo Nakahigashi; Hisatoshi Baba; Yusaku Ohta; Yoshihiro Ito; Hiroshi Yakiwara; Yukihiro Nakatani; Gou Fujie; Toshinori Sato; Hajime Shiobara; Kimihiro Mochizuki; Shin’ichi Sakai; The R/V Hakuho-maru KH-24-JE01 and KH-24-JE02C shipboard science parties; Yusuke Ota; Syuichi Suzuki; Takehi Isse; Hideji Abe; Shuichirou Hirano; Hiroaki Yamahana; Yojiro Sasagawa; Nanami Murai; Nagisa Nakao; Yuzuru Kaneko; Aina Idoguchi; Kansuke Takahashi; Teruki Ohta; Shuichi Suzuki; Masataka Masuda; Hideji Abe; Shin’ichi Tanaka; Takafumi Kasaya; Satoshi Ogura; Shun Fukushima; Ching-Yu Hu; Hiroaki Yamahana; Nagisa Nakao; Ryotaro Fujimura; Yuto Hirayama; Aina Idoguchi
Precise aftershock activity in the marine source region of the 2024 Noto-Hanto earthquake by rapid response observation using ocean bottom seismometers
Earth, Planets and Space, 03 Apr. 2025 - Toshitaka Baba; Tetsuo No; Koichiro Obana; Kentaro Imai; Naotaka Chikasada; Yuichiro Tanioka; Shuichi Kodaira
Authentic fault models and dispersive tsunami simulations for outer-rise normal earthquakes in the southern Kuril Trench
Earth, Planets and Space, Dec. 2024
76, 1 - Tetsuo No; Shuichi Kodaira; Kentaro Imai; Koichiro Obana; Gou Fujie; Yasuyuki Nakamura; Kazuya Shiraishi; Ryo Miura; Masao Nakanishi
Mapping normal faults on the outer slope of the western Kuril Trench based on recent seismic reflection and bathymetric data
Earth, Planets and Space, Dec. 2024
76, 1 - Toshiya Fujiwara; Kentaro Imai; Masayuki Obayashi; Kenta Yoshida; Noriko Tada; Koichiro Obana; Gou Fujie; Shigeaki Ono; Shuichi Kodaira
The Sofu Seamount Present in the Source Area of the October 2023 Earthquake and Tsunami in Japan
Geophysical Research Letters, 08 May 2024 - Gou Fujie; Shuichi Kodaira; Koichiro Obana; Yojiro Yamamoto; Takehi 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, Dec. 2023
10, 1 - Yasuyuki Nakamura; Shuichi Kodaira; Gou Fujie; Mikiya Yamashita; Koichiro Obana; Seiichi Miura
Incoming plate structure at the Japan Trench subduction zone revealed in densely spaced reflection seismic profiles
Progress in Earth and Planetary Science, 08 Aug. 2023 - Dirk Metz; Koichiro Obana; Yoshio Fukao
Remote Hydroacoustic Detection of an Airplane Crash
Pure and Applied Geophysics, Apr. 2023
180, 4, 1343, 1351 - Koichiro Obana; Tsutomu Takahashi; Yojiro Yamamoto; Takeshi Iinuma; Yasuyuki Nakamura; Gou Fujie; Seiichi Miura; 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, 03 Mar. 2023 - Ryuta Arai; Shuichi Kodaira; Stuart Henrys; Nathan Bangs; Koichiro Obana; Gou Fujie; Seiichi Miura; Daniel Barker; Dan Bassett; Rebecca Bell; Kimihiro Mochizuki; Richard Kellett; Valerie Stucker; Bill Fry
Seismic anisotropy structure of the northern Hikurangi margin, New Zealand, and its significance for subduction fault systems
27 Mar. 2022 - Tsutomu Takahashi; Yuka Kaiho; Yasushi Ishihara; Koichiro Obana; Seiichi Miura; Shuichi Kodaira; Yoshiyuki Kaneda
Trans-dimensional imaging of the random inhomogeneity structure in the southern Ryukyu arc, Japan
Geophysical Journal International, 12 Feb. 2022
229, 2, 1392, 1407 - 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
12 Nov. 2021 - Takashi Tonegawa; Eiichiro Araki; Hiroyuki Matsumoto; Toshinori Kimura; Koichiro Obana; Gou Fujie; Ryuta Arai; Kazuya Shiraishi; Masaru Nakano; Yasuyuki Nakamura; Takashi Yokobiki; Shuichi Kodaira
Extraction of P and Scholte waves from ambient seafloor noise observed by distributed acoustic sensing
Geophysical Research Letters, 07 Nov. 2021 - 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 (2017) 461 (163–175), (S0012821X17300092), (10.1016/j.epsl.2017.01.003))
Earth and Planetary Science Letters, 15 Aug. 2021
568 - Takashi Tonegawa; Eiichiro Araki; Hiroyuki Matsumoto; Toshinori Kimura; Koichiro Obana; Gou Fujie; Ryuta Arai; Kazuya Shiraishi; Masaru Nakano; Yasuyuki Nakamura; Takashi Yokobiki; Shuichi Kodaira
Vp and Vs structure estimations from ambient seafloor noise observed by distributed acoustic sensing
08 Jun. 2021 - 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, 12 Apr. 2021 - Matsumoto, H.; Araki, E.; Kimura, T.; Fujie, G.; Shiraishi, K.; Tonegawa, T.; Obana, K.; Arai, R.; Kaiho, Y.; Nakamura, Y.; Yokobiki, T.; Kodaira, S.; Takahashi, N.; Ellwood, R.; Yartsev, V.; Karrenbach, M.
Detection of hydroacoustic signals on a fiber-optic submarine cable
Scientific Reports, 2021
11, 1 - Qin, Y.; Fujie, G.; Kodaira, S.; Nakamura, Y.; Kaiho, Y.; No, T.; Obana, K.; Miura, S.
High-Density Seismic Refraction Imaging of Plate-Boundary Structures in the Slow Earthquake Gap Zone off Western Kii Peninsula, Nankai Trough
Geophysical Research Letters, 2021
48, 3 - Toshitaka Baba; Naotaka Yamamoto Chikasada; Yasuyuki Nakamura; Gou Fujie; Koichiro Obana; Seiichi Miura; Shuichi Kodaira
Deep Investigations of Outer-Rise Tsunami Characteristics using Well-Mapped Normal Faults along the Japan Trench
Journal of Geophysical Research: Solid Earth, 30 Apr. 2020
125, 10 - Arai, R.; Kodaira, S.; Henrys, S.; Bangs, N.; Obana, K.; Fujie, G.; Miura, S.; Barker, D.; Bassett, D.; Bell, R.; Mochizuki, K.; Kellett, R.; Stucker, V.; Fry, B.
Three-Dimensional P Wave Velocity Structure of the Northern Hikurangi Margin From the NZ3D Experiment: Evidence for Fault-Bound Anisotropy
Journal of Geophysical Research: Solid Earth, 2020
125, 12 - Hutchinson, J.; Kao, H.; Riedel, M.; Obana, K.; Wang, K.; Kodaira, S.; Takahashi, T.; Yamamoto, Y.
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 - Yamamoto, Y.; Takahashi, T.; Ishihara, Y.; Obana, K.; Miura, S.; Kodaira, S.; Kaneda, Y.
Plate geometry model and seismicity in the northern Ryukyu subduction zone, Japan, deduced from amphibious seismic observations
Earth and Planetary Science Letters, 2020
536 - Nakamura, Y.; Fujiwara, T.; Kodaira, S.; Miura, S.; Obana, K.
Correlation of frontal prism structures and slope failures near the trench axis with shallow megathrust slip at the Japan Trench
Scientific Reports, 2020
10, 1 - Hutchinson, J.; Kao, H.; Spence, G.; Obana, K.; Wang, K.; Kodaira, S.
Seismic characteristics of the nootka fault zone: Results from the seafloor earthquake array Japan–Canada cascadia experiment (seajade)
Bulletin of the Seismological Society of America, 2019
109, 6 - Ito, A.; Tonegawa, T.; Uchida, N.; Yamamoto, Y.; Suetsugu, D.; Hino, R.; Sugioka, H.; Obana, K.; Nakahigashi, K.; Shinohara, M.
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, 1 - Obana, K.; Fujie, G.; Takahashi, T.; Yamamoto, Y.; Tonegawa, T.; Miura, S.; Kodaira, S.
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 - Nakanishi, A.; Takahashi, N.; Yamamoto, Y.; Takahashi, T.; Citak, S.O.; Nakamura, T.; Obana, K.; Kodaira, S.; Kaneda, Y.
Three-dimensional plate geometry and P-wave velocity models of the subduction zone in SW Japan: Implications for seismogenesis
Special Paper of the Geological Society of America, 2018
534 - Obana, K.; Nakamura, Y.; Fujie, G.; Kodaira, S.; Kaiho, Y.; Yamamoto, Y.; Miura, S.
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 - Yamamoto, Y.; Takahashi, T.; Ishihara, Y.; Kaiho, Y.; Arai, R.; Obana, K.; Nakanishi, A.; Miura, S.; Kodaira, S.; Kaneda, Y.
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, 2 - Kano, M.; Aso, N.; Matsuzawa, T.; Ide, S.; Annoura, S.; Arai, R.; Baba, S.; Bostock, M.; Chao, K.; Heki, K.; Itaba, S.; Ito, Y.; Kamaya, N.; Maeda, T.; Maury, J.; Nakamura, M.; Nishimura, T.; Obana, K.; Ohta, K.; Poiata, N.; Rousset, B.; Sugioka, H.; Takagi, R.; Takahashi, T.; Takeo, A.; Tu, Y.; Uchida, N.; Yamashita, Y.; Obara, K.
Development of a slow earthquake database
Seismological Research Letters, 2018
89, 4 - Toh, A.; Obana, K.; Araki, E.
Distribution of very low frequency earthquakes in the Nankai accretionary prism influenced by a subducting-ridge
Earth and Planetary Science Letters, 2018
482 - Tonegawa, T.; Obana, K.; Fujie, G.; Kodaira, S.
Lateral variation of the uppermost oceanic plate in the outer-rise region of the Northwest Pacific Ocean inferred from Po-to-s converted waves
Earth, Planets and Space, 2018
70, 1 - Morishita Tomoaki; Gou Fujie; Yamano Makoto; Nakanishi Masao; Obana Koichiro; Nakamura Yasuyuki; Saito Saneatsu; Kodaira Shuichi; Kimura Jun-ichi; Kuroda Junichiro; Ono Shigeaki
Overview of the Drilling Project on the Bend-fault Hydrology in Old Incoming Plate
JOURNAL OF GEOGRAPHY-CHIGAKU ZASSHI, 2017
126, 2, 247, 262
[Reviewed] - Yamamoto, Y.; Takahashi, T.; Kaiho, Y.; Obana, K.; Nakanishi, A.; Kodaira, S.; Kaneda, Y.
Seismic structure off the Kii Peninsula, Japan, deduced from passive- and active-source seismographic data
Earth and Planetary Science Letters, 2017
461 - Ito, A.; Yamamoto, Y.; Hino, R.; Suetsugu, D.; Sugioka, H.; Nakano, M.; Obana, K.; Nakahigashi, K.; Shinohara, M.
Tomographic image of crust and upper mantle off the Boso Peninsula using data from an ocean-bottom seismograph array 4. Seismology
Earth, Planets and Space, 2017
69, 1 - Kodaira, S.; Nakamura, Y.; Yamamoto, Y.; Obana, K.; Fujie, G.; No, T.; Kaiho, Y.; Sato, T.; Miura, S.
Depth-varying structural characters in the rupture zone of the 2011 Tohoku-oki earthquake
Geosphere, 2017
13, 5 - Tonegawa, T.; Obana, K.; Yamamoto, Y.; Kodaira, S.; Wang, K.; Riedel, M.; Kao, H.; Spence, G.
Fracture alignments in marine sediments off vancouver Island from Ps splitting analysis
Bulletin of the Seismological Society of America, 2017
107, 1 - Ito, A.; Sugioka, H.; Obana, K.; Hino, R.; Suetsugu, D.; Nakahigashi, K.; Shinohara, M.; Nakano, M.; Yamamoto, Y.
Upper boundaries of the Pacific and Philippine Sea plates near the triple junction off the Boso Peninsula deduced from ocean-bottom seismic observations 4. Seismology
Earth, Planets and Space, 2017
69, 1 - Takahashi, T.; Obana, K.; Kodaira, S.
S-wave attenuation structure beneath the northern Izu-Bonin arc 4. Seismology
Earth, Planets and Space, 2016
68, 1 - To, A.; Obana, K.; Sugioka, H.; Araki, E.; Takahashi, N.; Fukao, Y.
Small size very low frequency earthquakes in the Nankai accretionary prism, following the 2011 Tohoku-Oki earthquake
Physics of the Earth and Planetary Interiors, 2015
245 - Tonegawa, T.; Fukao, Y.; Takahashi, T.; Obana, K.; Kodaira, S.; Kaneda, Y.
Ambient seafloor noise excited by earthquakes in the Nankai subduction zone
Nature Communications, 2015
6 - Obana, K.; Scherwath, M.; Yamamoto, Y.; Kodaira, S.; Wang, K.; Spence, G.; Riedel, M.; Kao, H.
Earthquake activity in northern Cascadia subduction zone off vancouver island revealed by ocean-bottom seismograph observations
Bulletin of the Seismological Society of America, 2015
105, 1 - Nakamura, Y.; Kodaira, S.; Cook, B.J.; Jeppson, T.; Kasaya, T.; Yamamoto, Y.; Hashimoto, Y.; Yamaguchi, M.; Obana, K.; Fujie, G.
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, 1 - Yamamoto, Y.; Obana, K.; Kodaira, S.; Hino, R.; Shinohara, M.
Structural heterogeneities around the megathrust zone of the 2011 Tohoku earthquake from tomographic inversion of onshore and offshore seismic observations
Journal of Geophysical Research: Solid Earth, 2014
119, 2 - Takahashi, T.; Obana, K.; Yamamoto, Y.; Nakanishi, A.; Kodaira, S.; Kaneda, Y.
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, 10 - Obana, K.; Takahashi, T.; No, T.; Kaiho, Y.; Kodaira, S.; Yamashita, M.; Sato, T.; Nakamura, T.
Distribution and migration of aftershocks of the 2010 Mw 7.4 Ogasawara Islands intraplate normal-faulting earthquake related to a fracture zone in the Pacific plate
Geochemistry, Geophysics, Geosystems, 2014
15, 4 - Obana, K.; Kodaira, S.; Nakamura, Y.; Sato, T.; Fujie, G.; Takahashi, T.; Yamamoto, Y.
Aftershocks of the December 7, 2012 intraplate doublet near the Japan Trench axis
Earth, Planets and Space, 2014
66, 1 - Yamamoto, Y.; Obana, K.; Takahashi, T.; Nakanishi, A.; Kodaira, S.; Kaneda, Y.
Seismicity and structural heterogeneities around the western Nankai Trough subduction zone, southwestern Japan
Earth and Planetary Science Letters, 2014
396 - 村井芳夫; 東龍介; 篠原雅尚; 町田祐弥; 山田知朗; 中東和夫; 真保敬; 望月公廣; 日野亮太; 伊藤喜宏; 佐通利典; 塩原肇; 植平賢司; 八木原寛; 尾鼻浩一郎; 高橋成実; 小平秀一; 平田賢治; 対馬弘晃; 岩崎貴哉
海底地震観測からわかった2011年東北地方太平洋沖地震の余震分布と応力変化
北海道大学地球物理学研究報告, 19 Mar. 2013
76, 147, 158 - Takahashi, T.; Obana, K.; Yamamoto, Y.; Nakanishi, A.; Kodaira, S.; Kaneda, Y.
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, 5 - Obana, K.; Kodaira, S.; Shinohara, M.; Hino, R.; Uehira, K.; Shiobara, H.; Nakahigashi, K.; Yamada, T.; Sugioka, H.; Ito, A.; Nakamura, Y.; Miura, S.; No, T.; Takahashi, N.
Aftershocks near the updip end of the 2011 Tohoku-Oki earthquake
Earth and Planetary Science Letters, 2013
382 - Yamamoto, Y.; Obana, K.; Takahashi, T.; Nakanishi, A.; Kodaira, S.; Kaneda, Y.
Imaging of the subducted kyushu-palau ridge in the hyuga-nada region, western nankai trough subduction zone
Tectonophysics, 2013
589 - Murai, Y.; Azuma, R.; Shmohara, M.; Machida, Y.; Yamada, T.; Nakahigashi, K.; Shinbo, T.; Mochizuki, K.; Hino, R.; Ito, Y.; Sato, T.; Shiobara, H.; Uehira, K.; Yakiwara, H.; Obana, K.; Takahashi, N.; Kodaira, S.; Hirata, K.; Tsushima, H.; Iwasaki, T.
Aftershock distribution of the 2011 off the Pacific coast of Tohoku earthquake and stress regime changes revealed by ocean bottom seismographic observation
Journal of the Hokkaido University, Faculty of Science, Series VII: Geophysics, 2013
76 - Shinohara, M.; Machida, Y.; Yamada, T.; Nakahigashi, K.; Shinbo, T.; Mochizuki, K.; Murai, Y.; Hino, R.; Ito, Y.; Sato, T.; Shiobara, H.; Uehira, K.; Yakiwara, H.; Obana, K.; Takahashi, N.; Kodaira, S.; Hirata, K.; Tsushima, H.; Iwasaki, T.
Precise aftershock distribution of the 2011 off the Pacific coast of Tohoku Earthquake revealed by an ocean-bottom seismometer network
Earth, Planets and Space, 2012
64, 12 - Sugioka, H.; Okamoto, T.; Nakamura, T.; Ishihara, Y.; Ito, A.; Obana, K.; Kinoshita, M.; Nakahigashi, K.; Shinohara, M.; Fukao, Y.
Tsunamigenic potential of the shallow subduction plate boundary inferred from slow seismic slip
Nature Geoscience, 2012
5, 6 - Minato, S.; Tsuji, T.; Matsuoka, T.; Obana, K.
Crosscorrelation of earthquake data using stationary phase evaluation: Insight into reflection structures of oceanic crust surface in the Nankai Trough
International Journal of Geophysics, 2012
2012 - Obana, K.; Fujie, G.; Takahashi, T.; Yamamoto, Y.; Nakamura, Y.; Kodaira, S.; Takahashi, N.; Kaneda, Y.; Shinohara, M.
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, 2 - Nakahigashi, K.; Shinohara, M.; Kurashimo, E.; Yamada, T.; Kato, A.; Takanami, T.; Uehira, K.; Ito, Y.; Iidaka, T.; Igarashi, T.; Sato, H.; Hino, R.; Obana, K.; Kaneda, Y.; Hirata, N.; Iwasaki, T.; Kanazawa, T.
Seismic structure of the source region of the 2007 Chuetsu-oki earthquake revealed by offshore-onshore seismic survey: Asperity zone of intraplate earthquake delimited by crustal inhomogeneity
Tectonophysics, 2012
562-563 - Tsutomu Takahashi; Koichiro Obana; Shuichi Kodaira; Daisuke Suetsugu; Narumi Takahashi; Shin'ichiro Kamiya; Yoshihiko Tamura
Random inhomogeneities in the northern Izu-Bonin arc estimated by tomographic inversion of peak delay times ofSwave seismograms
Journal of Geophysical Research, 08 Mar. 2011
116, B3 - Takahashi, T.; Obana, K.; Kodaira, S.; Suetsugu, D.; Takahashi, N.; Kamiya, S.; Tamura, Y.
Random inhomogeneities in the northern Izu-Bonin arc estimated by tomographic inversion of peak delay times of S wave seismograms
Journal of Geophysical Research: Solid Earth, 2011
116, 3 - Scherwath, M.; Spence, G.; Obana, K.; Kodaira, S.; Wang, K.; Riedel, M.; McGuire, J.; Collins, J.
Seafloor seismometers monitor northern Cascadia earthquakes
Eos, 2011
92, 47 - Shinohara, M.; Yamada, T.; Nakahigashi, K.; Sakai, S.; Mochizuki, K.; Uehira, K.; Ito, Y.; Azuma, R.; Kaiho, Y.; No, T.; Shiobara, H.; Hino, R.; Murai, Y.; Yakiwara, H.; Sato, T.; Machida, Y.; Shinbo, T.; Isse, T.; Miyamachi, H.; Obana, K.; Takahashi, N.; Kodaira, S.; Kaneda, Y.; Hirata, K.; Yoshikawa, S.; Obara, K.; Iwasaki, T.; Hirata, N.
Aftershock observation of the 2011 off the Pacific coast of Tohoku Earthquake by using ocean bottom seismometer network
Earth, Planets and Space, 2011
63, 7 - Obana, K.; Kamiya, S.; Kodaira, S.; Suetsugu, D.; Takahashi, N.; Takahashi, T.; Tamura, Y.
Along-arc variation in seismic velocity structure related to variable growth of arc crust in northern Izu-Bonin intraoceanic arc
Geochemistry, Geophysics, Geosystems, 2010
11, 8 - Obana, K.; Kodaira, S.; Kaneda, Y.
Seismicity at the eastern end of the 1944 Tonankai earthquake rupture area
Bulletin of the Seismological Society of America, 2009
99, 1 - Nakanishi, A.; Kurashimo, E.; Tatsumi, Y.; Yamaguchi, H.; Miura, S.; Kodaira, S.; Obana, K.; Takahashi, N.; Tsuru, T.; Kaneda, Y.; Iwasaki, T.; Hirata, N.
Crustal evolution of the southwestern Kuril Arc, Hokkaido Japan, deduced from seismic velocity and geochemical structure
Tectonophysics, 2009
472, 1-4 - No, T.; Takahashi, N.; Kodaira, S.; Obana, K.; Kaneda, Y.
Characteristics of deformation structure around the 2007 Niigata-ken Chuetsu-oki earthquake detected by multi-channel seismic reflection imaging
Earth, Planets and Space, 2009
61, 9 - Obana, K.; Kodaira, S.
Low-frequency tremors associated with reverse faults in a shallow accretionary prism
Earth and Planetary Science Letters, 2009
287, 1-2 - Shinohara, M.; Kanazawa, T.; Yamada, T.; Nakahigashi, K.; Sakai, S.; Hino, R.; Murai, Y.; Yamazaki, A.; Obana, K.; Ito, Y.; Iwakiri, K.; Miura, R.; Machida, Y.; Mochizuki, K.; Uehira, K.; Tahara, M.; Kuwano, A.; Amamiya, S.; Kodaira, S.; Takanami, T.; Kaneda, Y.; Iwasaki, T.
Precise aftershock distribution of the 2007 Chuetsu-oki Earthquake obtained by using an ocean bottom seismometer network
Earth, Planets and Space, 2008
60, 11 - Nakamura, M.; Yoshida, Y.; Zhao, D.; Takayama, H.; Obana, K.; Katao, H.; Kasahara, J.; Kanazawa, T.; Kodaira, S.; Sato, T.; Shiobara, H.; Shinohara, M.; Shimamura, H.; Takahashi, N.; Nakanishi, A.; Hino, R.; Murai, Y.; Mochizuki, K.
Three-dimensional P- and S-wave velocity structures beneath Japan
Physics of the Earth and Planetary Interiors, 2008
168, 1-2 - Obana, K.; Kodaira, S.; Kaneda, Y.
Seismicity related to heterogeneous structure along the western Nankai trough off Shikoku Island
Geophysical Research Letters, 2006
33, 23 - Araki, E.; Shinohara, M.; Obana, K.; Yamada, T.; Kaneda, Y.; Kanazawa, T.; Suyehiro, K.
Aftershock distribution of the 26 December 2004 Sumatra-Andaman earthquake from ocean bottom seismographic observation
Earth, Planets and Space, 2006
58, 2 - Obana, K.; Kodaira, S.; Kaneda, Y.
Seismicity in the incoming/subducting Philippine Sea plate off the Kii Peninsula, central Nankai trough
Journal of Geophysical Research: Solid Earth, 2005
110, 11 - Sakai, S.; Yamada, T.; Shinohara, M.; Hagiwara, H.; Kanazawa, T.; Obana, K.; Kodaira, S.; Kaneda, Y.
Urgent aftershock observation of the 2004 off the Kii Peninsula earthquake using ocean bottom seismometers
Earth, Planets and Space, 2005
57, 4 - Obana, K.; Kodaira, S.; Kaneda, Y.
Microseismicity around rupture area of the 1944 Tonankai earthquake from ocean bottom seismograph observations
Earth and Planetary Science Letters, 2004
222, 2 - Nakanishi, A.; Smith, A.J.; Miura, S.; Tsuru, T.; Kodaira, S.; Obana, K.; Takahashi, N.; Cummins, P.R.; Kaneda, Y.
Structural factors controlling the coseismic rupture zone of the 1973 Nemuro-Oki earthquake, the southern Kuril Trench seismogenic zone
Journal of Geophysical Research: Solid Earth, 2004
109, 5 - Iinuma, T.; Protti, M.; Obana, K.; Gonz{\'a}lez, V.; Van der Laat, R.; Kato, T.; Miyazaki, S.; Kaneda, Y.; Hern{\'a}ndez, E.
Inter-plate coupling in the Nicoya Peninsula, Costa Rica, as deduced from a trans-peninsula GPS experiment
Earth and Planetary Science Letters, 2004
223, 1-2 - Obana, K.; Kodaira, S.; Kaneda, Y.; Mochizuki, K.; Shinohara, M.; Suyehiro, K.
Microseismicity at the seaward updip limit of the western Nankai Trough seismogenic zone
Journal of Geophysical Research: Solid Earth, 2003
108, 10 - Obana, K.; Kodaira, S.; Mochizuki, K.; Shinohara, M.
Micro-seismicity around the seaward updip limit of the 1946 Nankai earthquake dislocation area
Geophysical Research Letters, 2001
28, 12 - Obana, K.; Katao, H.; Ando, M.
Seafloor positioning system with GPS-acoustic link for crustal dynamics observation - A preliminary result from experiments in the sea-
Earth, Planets and Space, 2000
52, 6 - Obana, K.; Katao, H.; Ando, M.
Sea-floor positioning with global positioning system-acoustic link system
Island Arc, 1999
8, 2
Misc.
- 利根川貴志; 荒木英一郎; 西田周平; 伊藤亜妃; 町田祐弥; 尾鼻浩一郎; 藤江剛
Retrieval of persistent S reflections from the megasplay fault beneath C0010
日本地震学会秋季大会講演予稿集(CD-ROM), 2024
2024 - 野徹雄; 藤江剛; 中村恭之; 高橋努; 尾鼻浩一郎; 石山達也; 赤間健一
Deep marine seismic survey across the eastern edge of hypocentral region of the 2024 Noto Peninsula earthquake
物理探査学会学術講演会講演論文集, 2024
151st - 篠原雅尚; 日野亮太; 高橋努; 尾鼻浩一郎; 小平秀一; 東龍介; 山田知朗; 悪原岳; 山下裕亮; 蔵下英司; 村井芳夫; 一瀬建日; 中東和夫; 馬場久紀; 太田雄策; 伊藤喜宏; 八木原寛; 仲谷幸浩; 藤江剛; 佐藤利典; 塩原肇; 望月公廣; 酒井慎一
2024年能登半島地震震源域における緊急海底地震観測
海洋調査技術学会研究成果発表会講演要旨集, 2024
36th
Presentations
- 尾鼻 浩一郎; 塩原 肇; 杉岡 裕子; 高橋 努; Riedel Michael; Lange Dietrich; Sun Tianhaozhe; Schaeffer Andrew; Douglas Karen; ôté Michelle; Hobbs Tiegan; Stacey Cooper; Wang Kelin; Heesemann Martin; Scherwath Martin; Hutchinson Jesse
海底観測によるカスカディア沈み込み帯北部、バンクーバー島沖の地震活動
日本地震学会2025年度秋季大会, 21 Oct. 2025 - 尾鼻 浩一郎; 伊藤 亜妃; 富士原 敏也; 大林 政行; 今井 健太郎; 中村 恭之; 吉田 健太; 多田 訓子; 中島 倫也; 松本 浩幸; 藤江 剛; 田中 聡; 小野 重明; 小平 秀一
Earthquake activity in the Torishima Rift and Sofu Seamount related to the October 2023 tsunamis observed in Japan
Japan Geoscience Union Meeting 2025, 28 May 2025 - Masanao Shinohara; Ryota Hino; Tsutomu Takahashi; Koichiro Obana; Shuichi Kodaira; Ryosuke Azuma; Tomoaki Yamada; Takeshi Akuhara; Yusuke Yamashita; Eiji Kurashimo; Yoshio Murai; Takehi Isse; Kazuo Nakahigashi; Hisatoshi Baba; Yusaku Ohta; Yoshihiro Ito; Hiroshi Yakiwara; Yukihiro Nakatani; Gou Fujie; Toshinori Sato; Hajime Shiobara; Kimihiro Mochizuki; Shin'ichi Sakai; Masanao Shinohara; Ryota Hino; Tsutomu Takahashi; Koichiro Obana; Shuichi Kodaira; Ryosuke Azuma; Tomoaki Yamada; Takeshi Akuhara; Yusuke Yamashita; Eiji Kurashimo; Yoshio Murai; Takehi Isse; Kazuo Nakahigashi; Hisatoshi Baba; Yusaku Ohta; Yoshihiro Ito; Hiroshi Yakiwara; Yukihiro Nakatani; Gou Fujie; Toshinori Sato; Hajime Shiobara; Kimihiro Mochizuki; Shin'ichi Sakai; KH-24-JE01 and KH-24-JE02C shipboard Scientists
Precise aftershock activity by rapid response seafloor observation in the eastern source region of the 2024 Noto-Hanto earthquake using ocean bottom seismometers
AGU24, 13 Dec. 2024 - Hajime Shiobara; Hiroko Sugioka; Koichiro Obana; Tsutomu Takahashi; Tianhaozhe Sun; Kelin Wang; Andrew J Schaeffer; Tiegan E Hobbs; Cooper Stacey; Karen Louise Douglas; Michael Riedel
Ocean bottom pressure gauge array observation for detecting slow earthquakes with a wide frequency range at Southwestern off the Vancouver Island
AGU24, 12 Dec. 2024 - Toshiya Fujiwara; Kentaro Imai; Masayuki Obayashi; Kenta Yoshida; Noriko Tada; Koichiro Obana; Gou Fujie; Shigeaki Ono; Shuichi Kodaira
The Sofu Seamount Submarine Volcano Present in the Source Area of the October 2023 Earthquakes and Tsunamis in Japan
AGU24, 10 Dec. 2024 - 篠原 雅尚; 日野 亮太; 高橋 努; 尾鼻 浩一郎; 小平 秀一; 東 龍介; 山田 知朗; 悪原 岳; 山下 裕亮; 蔵下 英司; 村井 芳夫; 一瀬 建日; 中東 和夫; 馬場 久紀; 太田 雄策; 伊藤 喜宏; 八木原; 仲谷 幸浩; 藤江 剛; 佐藤 利典; 塩原 肇; 望月 公廣; 酒井 慎; 白鳳丸KH-24-JE01および KH-24-JE02C乗船研究者
緊急海底地震観測による令和６年能登半島地震東部震源域における精密余震活動
日本地震学会2024年度秋季大会, 22 Oct. 2024 - 利根川 貴志; 荒木 英一郎; 西田 周平; 伊藤 亜妃; 町田 祐弥; 尾鼻 浩一郎; 藤江 剛
南海トラフ域C0010での分岐断層からの定常的な反射S波の抽出
日本地震学会2024年度秋季大会, 21 Oct. 2024 - 尾鼻 浩一郎; 塩原 肇; 杉岡 裕子; 高橋 努; Riedel Michael; Sun Tianhaozhe; Schaeffer Andrew; Douglas Karen; Côté Michelle; Hobbs Tiegan; Stacey Cooper; Wang Kelin; Heesemann Martin; Hutchinson Jesse
カスカディア沈み込み帯北部における海底地震、海底圧力計観測
日本地震学会2024年度秋季大会, 21 Oct. 2024 - 孫 岳; 宮川 歩夢; 尾鼻 浩一郎; Jamali Hondori Ehsa; 朴 進午
Shallow crustal structure and slip tendency of normal faults in the outer rise of the Japan Trench
日本地震学会2024年度秋季大会, 21 Oct. 2024 - 悪原 岳; 篠原 雅尚; 山田 知朗; 東 龍介; 日野 亮太; 尾鼻 浩一郎; 高橋 努; 藤江 剛; 小平 秀一; 村井 芳夫; 馬塲 久紀; 山下 裕亮; 八木原 寛
短周期海底地震計記録を用いた令和6年能登半島地震余震のモーメントテンソル解析
日本地震学会2024年度秋季大会, 20 Oct. 2024 - 高橋 努; 藤江 剛; 篠原 雅尚; 日野 亮太; 小平 秀一; 山田 知朗; 悪原 岳; 尾鼻 浩一郎; 東 龍介; 山下 裕亮; 村井 芳夫; 馬塲 久紀; 八木原 寛
令和６年能登半島地震震源域における応力降下量の空間変化
日本地震学会2024年度秋季大会, 20 Oct. 2024 - 尾鼻 浩一郎; 伊藤 亜妃; 中島 倫也; 富士原 敏也; 大林 政行; 田中 聡; 吉田 健太; 多田 訓子; 今井 健太郎; 松本 浩幸; 中村 恭之; 藤江 剛; 小野 重明; 小平 秀一
Earthquake activities near the Sofu Seamount with possible relations to Tsunamis observed in October 2023
日本地球惑星科学連合2024年大会, 31 May 2024 - 富士原 敏也; 今井 健太郎; 大林 政行; 吉田 健太; 多田 訓子; 尾鼻 浩一郎; 藤江 剛; 小野 重明; 小平 秀一
2023年10月9日地震津波の波源域にある孀婦海山
日本地球惑星科学連合2024年大会, 31 May 2024, [Invited] - 篠原 雅尚; 村井 芳夫; 日野 亮太; 太田 雄策; 東 龍介; 佐藤 利典; 塩原 肇; 望月 公廣; 一瀬 建日; 山田 知朗; 悪原 岳; 酒井 慎一; 蔵下 英司; 中東 和夫; 馬場 久紀; 伊藤 喜宏; 山下 裕亮; 八木原 寛; 仲谷 幸浩; 小平 秀一; 尾鼻 浩一郎; 藤江 剛; 高橋 努; KH-24-JE01およびKH-24-JE02C乗船研究者
海底地震計を用いた令和６年能登半島地震の緊急海底観測による余震分布
日本地球惑星科学連合2024年大会, 28 May 2024 - 尾鼻 浩一郎; 高橋 努; 村井 芳夫; 日野 亮太; 太田 雄策; 東 龍介; 佐藤 利典; 篠原 雅尚; 塩原 肇; 一瀬 建日; 山田 知朗; 悪原 岳; 中東 和夫; 馬場 久紀; 伊藤 喜宏; 山下 裕亮; 後藤 忠徳; 八木原 寛; 仲谷 幸浩; 笠谷 貴史; 大田 優介; 金子 純二; 小倉 訓; 野 徹雄; 藤江 剛; 小平 秀一; KH-24-JE01およびKH-24-JE02C 乗船研究者
「白鳳丸」による2024年能登半島地震緊急調査航海（KH-24-JE01、KH-24-JE02C）の概要
日本地球惑星科学連合2024年大会, 28 May 2024
