Takashi Tonegawa, Ryota Takagi, Kaoru Sawazaki, Katsuhiko Shiomi. Short-term and long-term variations in seismic velocity at shallow depths of the overriding plate west of the Japan Trench. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2022, 128, 1, p. e2022JB025262, doi: 10.1029/2022JB025262
Daisuke Suetsugu, Masayuki Obayashi, Takashi Tonegawa, Hajime Shiobara, Hiroko Sugioka, Aki Ito, Takehi Isse, Yasushi Ishihara, Satoru Tanaka, Junko Yoshimitsu. Nature of mantle discontinuities beneath the Ontong Java Plateau. PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 2022, doi: 10.1016/j.pepi.2022.106969
Takashi Tonegawa, Yoshio Fukao. Wave propagation of meteotsunamis and generation of free tsunamis in the sloping area of the Japan Trench for the 2022 Hunga–Tonga volcanic eruption. EARTH PLANETS AND SPACE, 2022, 74, p. 159, doi: 10.1186/s40623-022-01727-x
Takashi Tonegawa, Shunsuke Takemura, Suguru Yabe, Kiyoshi Yomogida. Fluid migration before and during slow earthquakes in the shallow Nankai subduction zone. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2022, 127, 3, doi: 10.1029/2021JB023583
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 wave from ambient seafloor noise observed by distributed acoustic sensing. GEOPHYSICAL RESEARCH LETTERS, 2022, 49, 4, doi: 10.1029/2022GL098162
Tatsuya Kubota, Tatsuhiko Saito, Yoshio Fukao, Hiroko Sugioka, Aki Ito, Takashi Tonegawa, Hajime Shiobara, Mikiya Yamashita. Earthquake Rupture and Tsunami Generation of the 2015 Mw 5.9 Bonin Event Revealed by In Situ Pressure Gauge Array Observations and Integrated Seismic and Tsunami Wave Simulation. GEOPHYSICAL RESEARCH LETTERS, 2021, 48, 22, doi: 10.1029/2021GL095915
Masayuki Obayashi, Junko Yoshimitsu, Daisuke Suetsugu, Hajime Shiobara, Hiroko Sugioka, Aki Ito, Takehi Isse, Yasushi Ishihara, Satoru Tanaka, Takashi Tonegawa. Interrelation of the stagnant slab, Ontong Java Plateau, and intraplate volcanism as inferred from seismic tomography. Scientific Reports, 2021, doi: 10.1038/s41598-021-99833-5
Yoshio Fukao, Tatsuya Kubota, Hiroko Sugioka, Aki Ito, Takashi Tonegawa, Hajime Shiobara, Mikiya Yamashita, Tatsuhiko Saito. Detection of “Rapid” Aseismic Slip at the Izu-Bonin Trench. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2021, 126, 9, doi: 10.1029/2021JB022132
Akamatsu Yuya, Katayama Ikuo, Tonegawa Takashi. Changes in elastic wave velocity during brittle deformation of gabbro and peridotite: Implications for oceanic Moho reflectivity. EARTH AND PLANETARY SCIENCE LETTERS, 2021, 568, p. 117036, doi: 10.1016/j.epsl.2021.117036
Takehi Isse, Daisuke Suetsugu, Akira Ishikawa, Hajime Shiobara, Hiroko Sugioka, Aki Ito, Yuki Kawano, Kazunori Yoshizawa, Yasushi Ishihara, Satoru Tanaka, Masayuki Obayashi, Takashi Tonegawa & Junko Yoshimitsu. Seismic evidence for a thermochemical mantle plume underplating the lithosphere of the Ontong Java Plateau. Communications Earth & Environment, 2021, 2, 98, doi: 10.1038/s43247-021-00169-9
Suguru Yabe, Satoru Baba, Takashi Tonegawa, Masaru Nakano, Shunsuke Takemura. Seismic energy radiation and along-strike heterogeneities of shallow tectonic tremors at the Nankai Trough and Japan Trench. TECTONOPHYSICS, 2021, 800, doi: 10.1016/j.tecto.2020.228714
Hiroyuki Matsumoto, Eiichiro Araki, Toshinori Kimura, Gou Fujie, Kazuya Shiraishi, Takashi Tonegawa, Koichiro Obana, Ryuta Arai, Yuka Kaiho, Yasuyuki Nakamura, Takashi Yokobiki, Shuichi Kodaira, Narumi Takahashi, Robert Ellwood, Victor Yartsev, Martin Karrenbach. Detection of hydroacoustic signals on a fiber-optic submarine cable. Scientific Reports, 2021, 11, doi: 10.1038/s41598-021-82093-8
Tonegawa Takashi, Kimura Toshinori, Araki Eiichiro. Near-Field Body-Wave Extraction From Ambient Seafloor Noise in the Nankai Subduction Zone. Frontiers in Earth Science, 2021, 8, p. 699, doi: 10.3389/feart.2020.610993
Yuki Kawano, Takehi Isse, Akiko Takeo, Hitoshi Kawakatsu, Daisuke Suetsugu, Hajime Shiobara, Hiroko Sugioka, Aki Ito, Yasushi Ishihara, Satoru Tanaka, Masayuki Obayashi, Takashi Tonegawa, Junko Yoshimitsu. Persistent Long-Period Signals Recorded by an OBS Array in the Western-Central Pacific: Activity of Ambrym Volcano in Vanuatu. GEOPHYSICAL RESEARCH LETTERS, 2020, 47, 19, doi: 10.1029/2020GL089108
Takeshi Akuhara, Takeshi Tsuji, Takashi Tonegawa. Overpressured Underthrust Sediment in the Nankai Trough Forearc Inferred From Transdimensional Inversion of High‐Frequency Teleseismic Waveforms. GEOPHYSICAL RESEARCH LETTERS, 2020, 47, 15, doi: 10.1029/2020GL088280
Takashi Tonegawa, Yusuke Yamashita, Tsutomu Takahashi, Masanao Shinohara, Yasushi Ishihara, Shuichi Kodaira, Yoshiyuki Kaneda. Spatial relationship between shallow very low frequency earthquakes and the subducted Kyushu-Palau Ridge in the Hyuga-nada region of the Nankai subduction zone. GEOPHYSICAL JOURNAL INTERNATIONAL, 2020, 222, 3, p. 1542-1554, doi: 10.1093/gji/ggaa264
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
D. Suetsugu, H. Shiobara, H. Sugioka, A. Ito, T. Isse, Y. Ishihara, S. Tanaka, M. Obayashi, T. Tonegawa, J. Yoshimitsu, T. Kobayashi. High QScS beneath the Ontong Java Plateau. EARTH PLANETS AND SPACE, 2019, 71, doi: 10.1186/s40623-019-1077-8
T. Tonegawa, S. Miura, A. Ishikawa, T. Sano, D. Suetsugu, T. Isse, H. Shiobara, H. Sugioka, A. Ito, Y. Ishihara, S. Tanaka, M. Obayashi, J. Yoshimitsu, T. Kobayashi. Characterization of Crustal and Uppermost‐Mantle Seismic Discontinuities in the Ontong Java Plateau. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2019, 124, 7, p. 7155-7170, doi: 10.1029/2018JB016970
Shunsuke Takemura, Takanori Matsuzawa, Akemi Noda, Takashi Tonegawa, Youichi Asano, Takeshi Kimura, Katsuhiko Shiomi. Structural Characteristics of the Nankai Trough Shallow Plate Boundary Inferred From Shallow Very Low Frequency Earthquakes. GEOPHYSICAL RESEARCH LETTERS, 2019, 46, 8, p. 4192-4201, doi: 10.1029/2019GL082448
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
Yabe Suguru, Tonegawa Takashi, Nakano Masaru. Scaled Energy Estimation for Shallow Slow Earthquakes. JOURNAL OF GEOPHYSICAL RESEARCH - Solid Earth, 2019, 124, 2, doi: 10.1029/2018JB016815
Shunsuke Takemura, Hisahiko Kubo, Takashi Tonegawa, Tatsuhiko Saito, Katsuhiko Shiomi. Modeling of Long-Period Ground Motions in the Nankai Subduction Zone: Model Simulation Using the Accretionary Prism Derived from Oceanfloor Local S-Wave Velocity Structures. PURE AND APPLIED GEOPHYSICS, 2018, 176, 2, p. 627-647, doi: 10.1007/s00024-018-2013-8
Takashi Tonegawa, Koichiro Obana, Gou Fujie and Shuichi Kodaira. 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, doi: 10.1186/s40623-018-0880-y
Shunsuke Takemura, Takanori Matsuzawa, Takeshi Kimura, Takashi Tonegawa, Katsuhiko Shiomi. Centroid Moment Tensor Inversion of Shallow Very Low Frequency Earthquakes Off the Kii Peninsula, Japan, Using a Three‐Dimensional Velocity Structure Model. GEOPHYSICAL RESEARCH LETTERS, 2018, 45, 13, p. 6450-6458, doi: 10.1029/2018GL078455
Masaru Nakano , Mamoru Hyodo, Ayako Nakanishi, Mikiya Yamashita, Takane Hori, Shin-ichiro Kamiya, Kensuke Suzuki, Takashi Tonegawa, Shuichi Kodaira, Narumi Takahashi, Yoshiyuki Kaneda. The 2016 Mw 5.9 earthquake off the southeastern coast of Mie Prefecture as an indicator of preparatory processes of the next Nankai Trough megathrust earthquake. Progress in Earth and Planetary Science, 2018, 5, doi: 10.1186/s40645-018-0188-3
Daisuke Suetsugu, Hajime Shiobara, Hiroko Sugioka, Noriko Tada, Aki Ito, Takehi Isse, Kiyoshi Baba, Hiroshi Ichihara, Toyonobu Ota, Yasushi Ishihara, Satoru Tanaka, Masayuki Obayashi, Takashi Tonegawa, Junko Yoshimitsu, Takumi Kobayashi, Hisashi Utada. The OJP array: seismological and electromagnetic observation on seafloor and islands in the Ontong Java Plateau. JAMSTEC Report of Research and Development, 2018, 26, p. 54-64, doi: 10.5918/jamstecr.26.54
Takashi Tonegawa, Yoshio Fukao, Hajime Shiobara, Hiroko Sugioka, Aki Ito, Mikiya Yamashita. Excitation location and seasonal variation of transoceanic infragravity waves observed at an absolute pressure gauge array. JOURNAL OF GEOPHYSICAL RESEARCH - Oceans, 2017, 123, 1, p. 40-52, doi: 10.1002/2017JC013488
Takashi Tonegawa, Eiichiro Araki, Toshinori Kimura, Takeshi Nakamura, Masaru Nakano, Kensuke Suzuki. Sporadic low-velocity volumes spatially correlate with shallow very low frequency earthquake clusters. Nature Communications, 2017, 8, doi: 10.1038/s41467-017-02276-8
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
Takemura Shunsuke, Yoshimoto Kazuo, Tonegawa Takashi. Scattering of trapped P and S waves in the hydrated subducting crust of the Philippine Sea plate at shallow depths beneath the Kanto region, Japan. Geophysical Journal International, 2015, 203, 3, p. 2261-2276, doi: doi:10.1093/gji/ggv423
Takashi Tonegawa, Yoshio Fukao, Go Fujie, Shunsuke Takemura, Tsutomu Takahashi, Shuichi Kodaira. Geographical distribution of shear wave anisotropy within marine sediments in the northwestern Pacific. Progress in Earth and Planetary Science, 2015, 2, p. 27, doi: 10.1186/s40645-015-0057-2
Takemura Shunsuke, Yoshimoto Kazuo, Tonegawa Takashi. Velocity increase in the uppermost oceanic crust of the Philippine Sea plate beneath the Kanto region due to dehydration inferred from high-frequency trapped P waves. Earth, Planets and Space, 2015, 67, 41, doi: doi:10.1186/s40623-015-0210-6
Takashi Tonegawa, Yoshio Fukao, Tsutomu Takahashi, Koichiro Obana, Shuichi Kodaira, Yoshiyuki Kaneda. Ambient seafloor noise excited by earthquakes in the Nankai subduction zone. Nature Communications, 2015, doi: 10.1038/ncomms7132
Takashi Tonegawa, Ryohei Iritani, Hitoshi Kawakatsu. Extraction of Moho-generated phases from vertical and radial receiver functions of seismic array. Bulletin of the Seismological Society of America, 2013, 103, 3, p. 2011-2024
Takashi Tonegawa, Yoshio Fukao, Kiwamu Nishida, Hiroko Sugioka, Aki Ito. A temporal change of shear wave anisotropy within the marine sedimentary layer associated with the 2011 Tohoku-Oki earthquake. Journal of Geophysical Research, 2013, 118, p. 607-615, doi: DOI:10.1002/jgrb.50074
tonegawa takashi. Inter-source body wave propagation derived from seismic interferometry. Geophys. J. Int., 2010, 183, p. 861-868
Takeo A., Idehara K., Iritani R., Tonegawa T., Nagaoka Y., Nishida K., Kawakatsu H.,Tanaka S., Miyakawa K., Iidaka T., Obayashi M., Tsuruoka H., Shiomi K., Obara K.. Very broadband analysis of a swarm of very low frequency earthquakes and tremors beneath Kii Peninsula, SW Japan. Geophys. Res. Lett., 2010, 37, doi: , doi:10.1029/2010GL042586
tonegawa takashi. Seismic Interferometry of teleseismic S-wave coda for retrieval of body waves -An application to the Philippine Sea slab underneath the Japanese Islands-. Geophys. J. Int., 2009, 178, 3, p. 1574-1586
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
Takashi Tonegawa, Koichiro Obana, Gou Fujie, Shuichi Kodaira. Lateral variation of seismic structure of the uppermost Pacific Plate in the Northwest Pacific Ocean. American Geophysical Union fall meeting 2017, 2017
Tanaka Satoru, Ishihara Yasushi, Nguyen Le Minh, Nguyen Hung Tien, Kim Taewoon,Tonegawa Takashi, Arai Ryuta. 10-years collaboration of JAMSTEC and IGP, VAST in Seismology and its achievements. Viet-Geophys2017, 2017
M. Nakano, A. Nakanishi, M. Yamashita, T. Tonegawa, T. Hori, S. Kamiya, K. Suzuki, K. Obana, S. Kodaira, E. Araki, N. Takahashi. Rupture on the megasplay fault along the Nankai trough during the off-Mie earthquake (Mw=6.0) on 1 April 2016. 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
Masaru Nakano, Ayako Nakanishi, Mikiya Yamashita, Takashi Tonegawa, Takane Hori, Shin'ichiro Kamiya, Kensuke Suzuki, Koichiro Obana, Shuichi Kodaira, Eiichiro Araki, Narumi Takahashi. Rupture on the megasplay fault along the Nankai trough during the off-Mie earthquake (Mw=6.0) on 1 April 2016. 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
Narumi Takahashi, Shin'ichiro Kamiya, Masaru Nakano, Kensuke Suzuki, Ayako Nakanishi, Koichiro Obana, Mikiya Yamashita, Takashi Tonegawa, Kentaro Imai, Takeshi Iinuma, Eiichiro Araki, Takane Hori, Shuichi Kodaira. Direct observation of a plate boundary earthquake by a seafloor network in the Nankai Trough seismogenic zone (DONET): an example of the M=6.5 earthquake on 1st April, 2016. 2016 AGU Fall Meeting, 2016
Takashi Tonegawa, Eiichiro Araki, Toshinori Kimura, and Takeshi Nakamura. Temporal variation of the Rayleigh admittance: Implication for S-wave velocity changes in the toe of the Nankai accretionary prism. EGU General Assembly 2016, 2016
Takehi Isse, Hitoshi Kawakatsu, Satoru Tanaka, Y John Chen, J. Ning, S. Grand, F. Niu, Masayuki Obayashi, Koji Miyakawa, K. Idehara, T. Tonegawa, Ryohei Iritani. Anisotropic structure of the upper mantle beneath the northeastern China from surface wave analysis. JpGU2013, 2013
Obayashi M,Kawakatsu H,Tanaka S,Chen Y J,Ning J,Grand Sm P,Niu F,Miyakawa K,Idehara K,Tonegawa T,Iritani R. P-wave tomography of Northeastern China observed with NECESSArray. AGU2011, 2011
S Tanaka,H Kawakatsu,Y Chen,J Ning,S Grand,F Niu,M Obayashi,K Miyakawa,K Idehara,T Tonegawa,R Iritani. P-wave Velocity Structure in the Lowermost 600 km of the Mantle beneath Western Pacific Inferred from Travel Times and Amplitudes Observed with NECESSArray. AGU2011, 2011
利根川 貴志、入谷 良平、川勝 均. Crustal Vp, Vs, and thickness estimations via vertical and radial receiver functions: Toward upper mantle imaging with corrections of crustal lateral variations. 日本地球惑星科学連合2011年大会, 2011
K. Idehara,S. Tanaka,N. Takeuchi,H. Kawakatsu,K. Miyakawa,T. Tonegawa,R. Iritani,NECESSArray Project Team. 大陸広帯域地震計観測網を用いた西太平洋下における最下部マントルS 波速度不均質構造. 地震学会地震学会2010秋季大会, 2010
S. Tanaka,H. Kawakatsu,K. Miyakawa,K. Idehara,T. Tonegawa R. Iritani,NECESSArray Project Team. NECESSArrayで観測されたトンガ・フィジー地域の地震によるP波走時の特徴. 地震学会2010年秋季大会, 2010
H. Kawakatsu,S. Tanaka,K. Miyakawa,K. Idhehara,T. Tonegawa,R. Iritani,NECESSArray Project Team. NECESSArray観測網の設置とファースト・データ. 地球惑星科学連合2010年大会, 2010
H. Kawakatsu, S. Tanaka, K. Miyakawa, K. Idhehara, T. Tonegawa, R. Iritani, M. Obayashi. 中国東北部における広帯域機動地震観測計画:NECESSArrayの現状. 日本地震学会2009年秋季大会, 2009
Masaru Nakano, Mamoru Hyodo, Ayako Nakanishi, Mikiya Yamashita, Takane Hori, Shin-ichiro Kamiya, Kensuke Suzuki, Takashi Tonegawa, Shuichi Kodaira, Narumi Takahashi and Yoshiyuki Kaneda. The 2016 off southeast Mie Prefecture earthquake (Mw=5.9) as an indicator of preparatory processes of the next Nankai Trough megathrust earthquake. The 2nd Asia-Pacific Workshop on Lithosphere and Mantle Dynamics, 2018
Satoru Tanaka, Daisuke Suetsugu, Hajime Shiobara, Hiroko Sugioka, Aki Ito, Takehi Isse, Yasushi Ishihara, Masayuki Obayashi, Takashi Tonegawa, Junko Yoshimitsu, Takumi Kobayashi. Shear wave splitting observed in the Ontong Java Plateau and adjacent regions. JpGU2018, 2018
Takashi Tonegawa, Takeshi Akuhara, Eiichiro Araki, Toshinori Kimura. Offshore receiver function imaging of the Philippine Sea Plate in the Nankai subduction zone. 日本地球惑星科学連合2018年大会, 2018
Takashi Tonegawa, Minh Le Nguyen, Satoru Tanaka, Yasushi Ishihara, Giang Thi Ha, Ryuta Arai, Hung Tien Nguyen, Bor-Shouh Huang, Win-Gee Huang. Seismic discontinuities in the upper mantle around Vietnam inferred from receiver functions. IAG-IASPEI2017, 2017
Takashi Tonegawa, Eiichiro Araki, Toshinori Kimura, Takeshi Nakamura, Masaru Nakano, Kensuke Suzuki. Lateral variation of low S-wave velocity zone in the Nankai accretionary prism derived from Rayleigh admittance. 日本地球惑星科学連合2017年大会, 2017
Tonegawa Takashi, Araki Eiichiro, Kimura Toshinori, Nakamura Takeshi, Nakano Masaru, Suzuki Kensuke. S-wave velocity structure in the Nankai accretionary prism derived from Rayleigh admittance. 19th EGU General Assembly, EGU2017, 2017
中野優・神谷眞一郎・鈴木健介・尾鼻浩一郎・山下幹也・利根川貴志・仲西理子・堀高峰・小平秀一・荒木英一郎・高橋成実. 2016年4月1日三重県南東沖地震(MJMA=6.5)の地震活動解析. 日本地震学会2016年度秋季大会, 2016, p. S09-P04
M. Nakano, E. Araki, T. Tonegawa, R. Nakata, and T. Hori. Spatio-temporal distribution of shallow very-low-frequency (VLF) earthquakes off the Kii Peninsula, southwest Japan. Joint workshop on slow earthquakes 2016, 2016
利根川貴志,石原靖. A receiver function imaging of the 660-km discontinuity beneath the Ogasawara Islands. 日本地球惑星科学連合2016年大会(国際セッション), 2016
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
Takashi Tonegawa, Hajime Shiobara, Takehi Isse, Hiroko Sugioka, Aki Ito, Akiko Takeo, Hitoshi Kawakatsu, Hisashi Utada. Seismic structure of oceanic crust and sediment in the northwestern Pacific. Structure and Dynamics of the Oceanic Lithosphere/Asthenosphere System, 2015
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
Takashi Tonegawa, Yoshio Fukao, Go Fujie, Tsutomu Takahashi, Shuichi Kodaira. Shear wave anisotropy within marine sediments in the northwestern Pacific: an ambient noise analysis on ocean bottom seismometers. SEG/AGU Summer Research WORKSHOP, 2014
Takashi Tonegawa, Yoshio Fukao, Kiwamu Nishida, Hiroko Sugioka, Aki Ito. A temporal change of shear wave anisotropy within the marine sedimentary layer associated with the 2011 Tohoku-Oki earthquake. AGU fall meeting 2012, 2012
A temporal change of shear wave anisotropy within the marine sedimentary layer associated with the 2011 Tohoku-Oki earthquake. AGU fall meeting 2012, 2012
tonegawa takashi. Basal reflector under the Philippine Sea plate. AGU fall meeting 2011, 2011
Iritani R,Kawakatsu H,Tanaka S,Chen Y, J,Ning J,Grand S P,Niu F,Takeuchi N,Obayashi M,Miyakawa K,Idehara K,Tonegawa T. The depth profiling of attenuation structure of the western hemisphere of the inner core by analyzing NECESSArray data. AGU2011, 2011
Takeuchi N,Kawakatsu H,Tanaka S,Chen Y J,Ning J,Grand S P,Niu F,Obayashi M,Iritani R,Miyakawa K,Idehara K,Tonegawa T. Upper-mantle Tomography with Array Analysis of Triplicated P-arrivals Observed by NECESSArray. AGU2011, 2011
Idehara K,Kawakatsu H,Tanaka S.,Chen Y J,Ning J,Grand S P,Niu F,Takeuchi N,Obayashi M,Miyakawa K,Tonegawa T,Iritani R. Pacific large-low-shear-velocity province bounded by an extensive high-velocity anomaly observed with NECESSArray. AGU2011, 2011