Publications

2024

[110] Usui, Y., Uyeshima, M., Sakanaka, S., Hashimoto, T., Ichiki, M., Kaida, T., Yamaya, Y.,  Ogawa, Y., Masuda, M., Akiyama, T., New robust remote reference estimator using robust multivariate linear regression, Geophys. J. Int., 2024, ggae199, https://doi.org/10.1093/gji/ggae199, 2024, June 6.

[109] Usui, Y., Uyeshima, M., Hase, H., Ichihara, H., Aizawa, K., Koyama, T., Sakanaka, S., Ogawa, T., Yamaya, Y., Nishitani, T., Asamori, K., Ogawa, Y., Yoshimura, R., Takakura, S., Mishina, M., Morita, Y., Three-dimensional electrical resistivity structure beneath a strain concentration area in the back-arc side of the northeastern Japan Arc, J. Geophys. Res. Solid Earth, 129, e2023JB028522. https://doi.org/10.1029/2023JB028522, 2024, May 17.

[108] Jarvis, P.A, Caldwell, T.G., Noble, C.,  Ogawa, Y., Vagasky, C., Volcanic lightning reveals umbrella cloud dynamics of the 15 January 2022 Hunga volcano eruption, Tonga. Bull Volcanol 86, 54,  https://doi.org/10.1007/s00445-024-01739-3, 2024. May 13

[107] Cornel E.J. de Ronde, Ery C. Hughes, Yasuo Ogawa and Michael C. Rowe, Okataina Volcanic Centre, New Zealand: magmatic, volcanological, structural, thermal, and geothermal evolution of an active caldera system—Introduction, J. Volcanol. Geotherm. Res., Volume 448, 108037, https://doi.org/10.1016/j.jvolgeores.2024.108037, April 2024, 2024.

2023

[106] Yamada, T., Terada, A., Noguchi, R., Kanda, W., Ueda, H., Aoyama, H., Ohkura, T., Ogawa, Y., Tanada, T., The onset, middle, and climax of precursory hydrothermal intrusion of the 2018 phreatic eruption at Kusatsu-Shirane volcano, J. Geophys. Res. Solid Earth, 128, 11, e2023JB026781, https://doi.org/10.1029/2023JB026781, 2023.

[105] Heise, W, Bertrand, EA, Caldwell, TG, Ogawa, Y, Bannister S, Bennie, SL, Hart, R, Palmer, N, Tseng, KH, Fukai, M, Ishikawa, M, Seki, K, Nishizawa, T, McGrath, J, An electrical resistivity image of the Hikurangi Subduction Margin, Geophys. J. Int., 235, 1552–1564, https://doi.org/10.1093/gji/ggad313, 2023.

[104] Ogawa, Y., Nishitani, N., Furuya, M., Acocella, V., and Hussmann, H., 20th Anniversary Issue: Earth, Planetary, and Space Science in the Next Decade, Earth Planets Space, 75:17, https://doi.org/10.1186/s40623-023-01774-y, 2023.

2022

[103] Suzuki, Y., Akatsuka, T., Yamaya, Y., Watanabe, N., Okamoto, K., Osato, K., Kajiwara, T., Ogawa, Y., Mogi, T., Tsuchiya, N., Asanuma, H., Estimation of an ultra-high-temperature geothermal reservoir model in the Kakkonda geothermal field, northeastern Japan, Geothermics, 105, 102525, https://doi.org/10.1016/j.geothermics.2022.102525, 2022.

[102] Hill GJ, Wannamaker PE, Maris V, Stodt JA, Kordy MA, Unsworth MJ, Bedrosian P, Wallin E, Uhlmann DF, Ogawa Y, Kyle PR, Autor correction: Trans-crustal structural control of CO2-rich extensional magmatic systems revealed at Mount Erebus Antarctica: Nat Commun,13, 2989,10.1038/s41467-022-31694-6, 2022.

[101] Ogawa Y, Ohba T, Fischer TP, Yamamoto M, Jolly A, Special issue “Understanding phreatic eruptions - recent observations of Kusatsu-Shirane volcano and equivalents -”, Earth Planets Space, 74:100, https://doi.org/10.1186/s40623-022-01643-0, 2022.

[100] Hill GJ, Wannamaker PE, Maris V, Stodt JA, Kordy MA, Unsworth MJ, Bedrosian P, Wallin E, Uhlmann DF, Ogawa Y, Kyle PR, Trans-crustal structural control of CO2-rich extensional magmatic systems revealed at Mount Erebus Antarctica: Nat Commun,13, 2989, https://doi.org/10.1038/s41467-022-30627-7, 2022. (Press Release from the University of Utah)   (EOS article)  (selected as a highlighted research by the Czech Academy of Sciences)

[99] Tseng, K-H, Ogawa, Y., Nurhasan, Tank, S.B., Ujihara, N., Honkura, Y., Terada, A., Usui, Y., Kanda, W., Correction to: Anatomy of active volcanic edifice at the Kusatsu–Shirane volcano, Japan, by magnetotellurics: hydrothermal implications for volcanic unrests, Earth Planets Space, 74:81, https://doi.org/10.1186/s40623-022-01630-5, 2022.

[98] Yamaya, Y., Suzuki, Y., Murata, Y., Okamoto, K., Watanabe, N., Asanuma, H., Hase, H., Ogawa, Y., Mogi, T., Ishizu, K., Uchida, T., 3-D resistivity imaging of the supercritical geothermal system in the Sengan geothermal region, NE Japan, Geothermics, 103, 102412, doi:10.1002/essoar.10509292.1, 2022.

[97] Ishizu, K., Ogawa, Y., Nunohara, K., Tsuchiya, N., Ichiki, M., Hase, H., Kanda, W., Sakanaka, S., Honkura, Y., Hino, Y., Seki, K., Tseng, K.H., Yamaya, Y., Mogi, T., Estimation of spatial distribution and fluid fraction of a potential supercritical geothermal reservoir by magnetotelluric data: a case study from Yuzawa geothermal field, NE Japan, J. Geophys. Res. Solid Earth, https://doi.org/10.1029/2021JB022911, 2022. [Press release in Japanese]  Most downloaded article in 2023 (Top 10% downloaded),

2021

[96] Iwamori, H, Ueki, K., Hoshide, T., Sakuma, H., Ichiki, M., Watanabe, T., Nakamura, M., Nakamura, H., Nishizawa, T., Nakao, A., Ogawa, Y., Kuwatani, T., Nagata, K., Okada, T., Takahashi, E., Simultaneous Analysis of Seismic Velocity and Electrical Conductivity in the Crust and the Uppermost Mantle: A forward Model and Inversion Based on Grid Search, J. Geophys. Res. Solid Earth, https://doi.org/10.1029/2021JB022307, 17194028, 2021. [Press release in Japanese]

[95] Ishizu, K., and Ogawa Y, Offshore–onshore resistivity imaging of freshwater using a controlled source electromagnetic method: A feasibility study, Geophysics, 86 (6), https://doi.org/10.1190/geo2020-0906.1, 2021.

[94] Terada, A., W. Kanda, Y. Ogawa, T. Yamada, M. Yamamoto, T. Ohkura,H. Aoyama, T. Tsutsui, S. Onizawa, The 2018 phreatic eruption at Mt. Motoshirane of Kusatsu–Shirane volcano, Japan: Eruption and intrusion of hydrothermal fluid observed by a borehole tiltmeter network, Earth Planets Space,73:157, https://doi.org/10.1186/s40623-021-01475-4, 2021. [Press release in Japanese] (Best Paper Award, The Volcanological Society of Japan)

[93] Ishizu, K., Y. Ogawa, T. Mogi, Y. Yamaya and T. Uchida, Ability of the magnetotelluric method to image a deep conductor: Exploration of a supercritical geothermal system, Geothermics, 96, 102205, https://doi.org/10.1016/j.geothermics.2021.102205, 2021.

[92] Usui Y, Uyeshima M, Ogawa T, Yoshimura R, Oshiman N, Yamaguchi S, Toh H, Murakami H, Aizawa K, Tanbo T, Ogawa Y, Nishitani T, Sakanaka S, Mishina M, Satoh H, Goto T, Kasaya T, Mogi T, Yamaya Y, Shiozaki I and Honkura Y, Electrical resistivity structure around the Atotsugawa fault, central Japan, revealed by a new 2-D inversion method combining Wideband-MT and Network-MT datasets, J. Geophys. Res. Solid Earth, 126, e2020JB020904, https://doi.org/10.1029/2020JB020904, 2021.

[91] Yamada, T, Kurokawa, AK, Terada, A, Kanda, W, Ueda, H, Aoyama, H, Ohkura, T, Ogawa, Y, Tanada, T, Locating hydrothermal fluid injection of the 2018 phreatic eruption at Kusatsu-Shirane volcano with volcanic tremor amplitude, Earth Planets Space,73:14, https://doi.org/10.1186/s40623-020-01349-1, 2021.

2020

[90] Tseng, K-H, Ogawa, Y., Nurhasan, Tank, S.B. , Ujihara, N., Honkura, Y., Terada, A., Usui, Y., Kanda, W., Anatomy of Active Volcanic Edifice at the Kusatsu-Shirane Volcano, Japan, by Magnetotellurics: Hydrothermal Implications for Volcanic Unrests, Earth Planets Space, 72:161, https://doi.org/10.1186/s40623-020-01283-2, 2020. (selected as a highlighted paper)   ITB BULLETIN

[89] Karaş, M., Tank, S.B., Ogawa, Y., Oshiman, N., Matsushima, M., Honkura, Y., Probing the relationship between electrical conductivity and creep through upper crustal fluids along the western part of the North Anatolian Fault with three-dimensional magnetotellurics, Tectonophysics, 791, 228561, https://doi.org/10.1016/j.tecto.2020.228561, 2020.

[88] Hill, G.J., Bibby, H.M., Peacock, J., Wallin, E.L., Ogawa, Y., Caricchi, L., Keys, H., Bennie, S.L., Avram, Y., Temporal magnetotellurics reveals mechanics of the 2012 Mount Tongariro, NZ, eruption, Geophys. Res. Lett.,47,8, e2019GL086429, https://doi.org/10.1029/2019GL086429, 2020.

[87] Matsunaga, Y., Kanda, W., Takakura, S., Koyama, T., Saito, Z., Seki, K., Suzuki, A., Kishita, T., Kinoshita, Y., Ogawa Y., Magmatic hydrothermal system inferred from the resistivity structure of Kusatsu-Shirane Volcano, J. Volcanol. Geotherm. Res., 390, 106742, https://doi.org/10.1016/j.jvolgeores.2019.106742, 2020.

[86] Yaguchi, M., Terada, A., and Ogawa Y., Air-fall ash from the main crater of Asama volcano on August 7, 2019, and its water-soluble components, Journal of Disaster Research, vol.15, no.1, 53-36, 2020.

[85] Asanuma, H., Mogi, T., Tsuchiya, N., Watanabe, N., Naganawa, S., Ogawa, Y., Fujimitsu, Y., Kajiwara, T., Osato, K., Shimada, K. Horimoto, S., Sato, T., Yamada, S., Watanabe, K., Japanese Supercritical Geothermal Project for Drastic Increase of Geothermal Power Generation in 2050, Proceedings World Geothermal Congress 2020, Reykjavik, Iceland, April 26 – May 2, 2020.

2019

[84] Heise W, Ogawa Y, Bertrand EA, Caldwell TG, Yoshimura R, Ichihara H, Bennie SL, Seki K, Saito Z, Matsunaga Y, Suzuki A, Kishita T, Kinoshita Y, Electrical resistivity imaging of the inter-plate coupling transition at the Hikurangi subduction margin, New Zealand, Earth Planet. Sci. Lett., 524, 115710, https://doi.org/10.1016/j.epsl.2019.115710, 2019.

[83] Okamoto K., Asanuma H., Ishibashi T., Yamaya Y., Saishu H., Yanagisawa N., Mogi T., Tsuchiya N., Okamoto A., Naganawa S., Ogawa, Y., Ishitsuka K., Fujimitsu Y., Kitamura K., Kajiwara T., Horimoto S., Shimada K., Geological and engineering features of developing ultra-high-temperature geothermal systems in the world, Geothermics, 82, 267-281, https://doi.org/10.1016/j.geothermics.2019.07.002, 2019

[82] Asanuma, H., Mogi, T., Tsuchiya, N., Watanabe, N., Naganawa, S., Ogawa, Y., Fujimitsu, Y., Kajiwara, T., Osato, K., Shimada, K. Horimoto, S., Sato, T., Yamada, S., Watanabe, K. and Gotoh, Y., Status of Japanese Supercritical Geothermal Project in FY2018, Geothermal Resources Council Transactions, 43, 2019.

2018

[81] Usui, Y., Kasaya, T., Ogawa, Y., Iwamoto, H., Marine magnetotelluric inversion with an unstructured tetrahedral mesh, Geophys. J. Int., 214, 952–974, https://doi.org/10.1093/gji/ggy171, 2018.

[80] Yoshimura, R. Y. Ogawa, Y. Yukutake, W. Kanda, S. Komori, H. Hase, T.N. Goto, R. Honda, M. Harada, T. Yamazaki, M. Kamo, S. Kawasaki, T. Higa, T. Suzuki, Y. Yasuda, M. Tani, Y. Usui, Resistivity characterisation of Hakone volcano, central Japan, by three-dimensional magnetotelluric inversion, Earth Planets Space, 70:66 https://doi.org/10.1186/s40623-018-0848-y, 2018.

[79] Wannamaker P, Hill G, Stodt J, Maris V, Ogawa Y, Selway K, Boren G, Bertrand E, Uhlmann D, Ayling B, Green AM, Feucht D, Author corrections: Uplift of the central transantarctic mountains. Nat Commun 9:740. doi: 10.1038/s41467-018-03349-y, 2018.

[78] Asanuma, H., Mogi, T., Tsuchiya, N., Watanabe, N., Naganawa, S., Ogawa, Y., Fujimitsu, Y., Kajiwara, T., Osato, K., Shimada, K. Horimoto, S., Sato, T., Ito, T., Yamada, S., Watanabe, K., Gotoh, Y., Nagasawa, Y. and Kohyama, A., Status report on the Japanese Supercritical Geothermal Project for FY2017, Geothermal Resources Council Transactions, 42, 2366-2370, 2018.

2017

[77] Wannamaker, P.E., Hill, G., Stodt, J., Maris, V., Ogawa, Y., Selway, K., Boren, G., Bertrand, E.A., Uhlmann, D., Ayling, B., Green, A.M. and Feucht, D., Uplift of the Central Transantarctic Mountains, Nat Commun, 8:1588, doi:10.1038/s41467-017-01577-2, 2017.

[76] Heise, W., T. G. Caldwell, S. Bannister, E.A. Bertrand, Y. Ogawa, S.L. Bennie, and H. Ichihara, Mapping subduction interface coupling using magnetotellurics; Hikurangi Margin, New Zealand, Geophys. Res. Lett., 44,18, 9261-9266, doi:10.1002/2017GL074641, 2017. (Journal Highlights)

[75] Usui, Y., Y. Ogawa, K. Aizawa, W. Kanda, T. Hashimoto, T. Koyama, Y. Yamaya and T. Kagiyama, Three-dimensional resistivity structure of Asama Volcano revealed by data-space magnetotelluric inversion using unstructured tetrahedral elements, Geophys. J. Int., 208 (3): 1359-1372, https://doi.org/10.1093/gji/ggw459, 2017.

[74] Mekkawi MM, Arafa-Hamed T. Amatykul P, Ogawa Y and Atya M, Three Dimensional Modelling of Kharga Reservoir Water, New Valley Egypt, Using Magnetotelluric Data, J Geol Geophys, 7:1 DOI:10.4172/2381-8719.1000318, 2017.

2016

[73] Wang L., Lewis A., Ogawa Y, Jones W., Costelloe M., Modelling geomagnetic induction hazards using a 3-D electrical conductivity model of Australia, Space Weather, 14, 12, https://doi.org/10.1002/2016SW001436, 2016. (Cover page of the issue)

[72] Seki K, Kanda W, Tanbo T, Ohba T, Ogawa Y, Takakura S, Kenji N, Ushioda M, Suzuki A, Saito Z, Matsunaga Y., Resistivity structure and geochemistry of the Jigokudani Valley hydrothermal system, Mt. Tateyama, Japan, J. Volcanol. Geotherm. Res., 325, 15-26, doi: 10.1016/j.jvolgeores.2016.06.010, 2016.

[71] Ichihara, H., Mogi T., Tanimoto, K., Yamaya, Y., Hashimoto, T., Uyeshima, M. and Ogawa, Y., Crustal structure and fluid distribution beneath the southern part of the Hidaka collision zone revealed by 3-D electrical resistivity modeling, Geochem. Geophys. Geosyst., 17, 4, doi:10.1002/2015GC006222, 2016.

[70] Aizawa, K., Sumino, H., Uyeshima, M., Yamaya, Y., Hase, H., Takahashi, H. A. Takahashi, M., Kazahaya, K., Ohno, M., Rung-Arunwan, T., and Ogawa, Y., Gas pathways and remotely triggered earthquakes beneath Mt. Fuji, Japan, Geology, doi:10.1130/G37313.1, 2016.

2015

[66] Ichiki, M., Ogawa, Y., Kaida, T., Koyama, T., Uyeshima, M., Demachi, T., Hirahara, S., Honkura, Y., Kanda, W., Kono, T., Matsushima, M., Nakayama, T., Suzuki, S., Toh, H., Electrical image of subduction zone beneath northeastern Japan. J. Geophys. Res., 120, doi:10.1002/2015JB012028, 2015.

[65] Hill, G.J., Bibby, H.M., Ogawa, Y., Wallin, E.L., Bennie, S.L., Caldwell, T.G., Bertrand, E.A., Heise, W., Structure of the Tongariro volcanic system: insights from magnetotelluric imaging, Earth Planet. Sci. Lett., 432, 115-125, https://doi.org/10.1016/j.epsl.2015.10.003, 2015.

[64] Seki,K., Kanda, W., Ogawa, Y., Tanbo, T., Kobayashi, T., Hino, Y., and Hase, H., Imaging the hydrothermal system beneath the Jigokudani valley, Tateyama volcano, Japan: Implications for structures controlling repeated phreatic eruptions from an audio-frequency magnetotelluric survey, Earth Planets Space, 67:6, 2015.

2014

[69] Ogawa, Y., Ichiki, M., Kanda, W., Mishina, M., and Asamori, K., Three-dimensional magnetotelluric imaging of crustal fluids and seismicity around Naruko volcano, NE Japan, Earth Planets Space, 66:158, https://doi.org/10.1186/s40623-014-0158-y, 2014. (selected as a highlighted paper)

[68] Wang, L., A. Hitchman, Y. Ogawa, W. Siripunvaraporn, M. Ichiki,, K. Fuji-ta., A 3-D resistivity model of the Australian continent using magnetometer array data, Geophys. J. Int., 198, 1171–1186, https://doi.org/10.1093/gji/ggu188, 2014.

[67] Ichihara, H. , S. Sakanaka, M. Mishina, M. Uyeshima, T. Nishitani, Y. Ogawa, Y. Yamaya, T. Mogi, K. Amita and T. Miura, A 3-D electrical resistivity model beneath the focal zone of the 2008 Iwate-Miyagi Nairiku earthquake (M 7.2), Earth Planets Space, 66:50, doi:10.1186/1880-5981-66-50,2014.

[66] Kanda, W. and Ogawa, Y., Three-dimensional electromagnetic imaging of fluids and melts beneath the NE Japan arc revisited by using geomagnetic transfer function data, Earth Planets Space, 66:39, doi:10.1186/1880-5981-66-39, 2014.

[65] Aizawa, K., T. Koyama, H. Hase, M. Uyeshima,W. Kanda, M. Utsusgi, R. Yoshimura, Y. Yamaya, T. Hashimoto, K. Yamazaki, S. Komatsu, A. Watanabe, K. Miyakawa, Y. Ogawa, Three-dimensional resistivity structure and magma plumbing system of the Kirishima volcanoes as inferred from broad-band magnetotelluric data, J. Geophys. Res.,119, doi:10.1002/2013JB010682, 2014.

2013

[64] Heise, W., T.G. Caldwell, E.A. Bertrand, G.J. Hill, S.L. Bennie, and Y. Ogawa, Changes in electrical resistivity track changes in tectonic plate coupling, Geophys. Res. Lett., 40:1-5. doi: 10.1002/grl.50959, 2013. (AGU SPOTLIGHT)

[63] Aizawa, K., T. Koyama, M. Uyeshima, H. Hase, T. Hashimoto,W. Kanda, R. Yoshimura,M. Utusgi, Y. Ogawa, K. Yamazaki, Magnetotelluric and temperature monitoring after the 2011 sub-Plinian eruptions of Shinmoe-dake volcano, Earth Planets Space, 65, 539-550, 2013.

[62]Matsushima, M., Y. Honkura, M. Kuriki, and Y. Ogawa, Circularly polarised electric fields associated with seismic waves generated by blasting, Geophy. J. Int. , 194, 200-211, 2013.

[61] Kaya, T., T. Kasaya, S. B. Tank, Y. Ogawa, M. K. Tuncer, N. Oshiman, Y. Honkura, M. Matsushima, Electrical characterization of the North Anatolian Fault Zone underneath the Marmara Sea, Turkey by ocean bottom magnetotellurics, Geophys. J. Int., 193, 664-677, 2013.

[60] Boonchaisuk, S. W. Siripunvaraporn and Y. Ogawa, Evidence for middle Triassic to Miocene dual subduction zones beneath the Shan-Thai terrane, western Thailand from magnetotelluric data, Gondwana Research, 23, 4, 1607–1616, 2013.

[59] Kuriki, M., Matsushima, M., Ogawa, Y., Honkura Y., Erratum to: Spectral peaks in electric field at resonance frequencies for seismically excited motion of ions in the Earth's magnetic field, Earth Planets Space, 65, 57, 2013.

[58] Kanda, W., T. Yamazaki, Y. Ogawa, T. Hashimoto, S. Sakanaka, K. Aizawa, S. Takakura, T. Koyama, K. Yamada T. Kobayashi S. Komori, Shallow Resistivity Structure of Sakurajima Volcano Revealed by Audio-frequency Magnetotellurics, Bull. Volcanol. Soc. Jpn., 58, 1, 251-167, 2013.

2011

[57] Kuriki, M., M. Matsushima, Y. Ogawa, and Y. Honkura , Spectral peaks in electric field at resonance frequencies for seismically excited motion of ions in the Earth’s magnetic field, Earth Planets Space, 63, 503–507, 2011.

[56] Ichihara, H., M. Uyeshima, S. Sakanaka, T. Ogawa, M. Mishina, Y. Ogawa, T. Nishitani, Y. Yamaya, A. Watanabe, Y. Morita, R. Yoshimura, Y. Usui, A fault-zone conductor beneath a compressional inversion zone, northeastern Honshu, Japan, Geophys. Res. Lett., 38, L09301, doi:10.1029/2011GL047382, 2011

[55] Aizawa, K., W. Kanda, Y. Ogawa, M. Iguchi, A. Yokoo, H. Yakiwara, T. Sugano, Temporal Changes in Electrical Resistivity at Sakurajima Volcano from Continuous Magnetotelluric Observations, J. Volcanol. Geotherm. Res., 199, 165-175, 2011

2010

[54] Asamori, K., K. Umeda, Y. Ogawa and T. Oikawa, Electrical Resistivity Structure and Helium Isotopes Around Naruko Volcano, Northeastern Japan and its Implication for the Distribution of Crustal Magma, International Journal of Geophysics, Volume 2010, Article ID 738139, doi:10.1155/2010/738139, 2010.

[53] Aizawa, K., A. Yokoo, W. Kanda, Y. Ogawa, M. Iguchi, Magnetotelluric Pulses Generated by Volcanic Lightning at Sakurajima Volcano, Japan, Geophys. Res. Lett., 37, L17301, doi:10.1029/2010GL044208, 2010.

[52] Yamaguchi, S., Y. Ogawa, K. Fuji-ta, N. Ujihara, H. Inokuchi, and N. Oshiman, Audio-frequency magnetotelluric imaging of the Hijima fault in the Yamasaki fault system, southwest Japan, Earth Planets Space, 62(4), 401-411, 2010.

2009

[51] Yoshimura, R., N. Oshiman, M. Uyeshima, H. Toh, T. Uto, H. Kanezaki, Y. Mochido, K. Aizawa, Y. Ogawa, T. Nishitani, S. Sakanaka, M. Mishina, H. Satoh, T. Goto, T. Kasaya, S. Yamaguchi, H. Murakami, T. Mogi, Y. Yamaya, M. Harada, I. Shiozaki, Y. Honkura, S. Koyama, S. Nakao, Y. Wada, and Y. Fujita, Magnetotelluric Transect of the Niigata-Kobe Tectonic Zone, Central Japan: A Clear Correlation between Strain Accumulation and Resistivity Structure, Geophys. Res. Lett. 36, 20, L20311, doi.org/10.1029/2009GL040016, 2009

[50] Aizawa, K., Y. Ogawa, M. Mishina, K, Takahashi, S. Nagaoka, N. Takagi, S. Sakanaka, T. Miura, Structural controls on the 1998 volcanic unrest at Iwate Volcano: relationship between shallow electric resistive body and possible magmatic fluid ascent route, J. Volcanol. Geotherm. Res., 187, 131–139, 2009.

[49] Honkura, Y., Y. Ogawa, M. Matsushima, S. Nagaoka, N. Ujihara, and T. Yamawaki, A model for observed circular polarized electric fields coincident with the passage of large seismic waves, J. Geophys. Res., 114, B10103, doi:10.1029/2008JB006117, 2009.

[48] Ingham, M.R. , H.M. Bibby, W. Heise, K.A. Jones, P. Cairns, S. Dravitzki, S.L. Bennie, T.G. Caldwell and Y. Ogawa, A magnetotelluric study of Mount Ruapehu volcano, New Zealand, Geophys. J. Int., 179, 887-904, doi:10.1111/j.1365-246X.2009.04317.x, 2009.

[47] Wannamaker, P.E., T.G. Caldwell, G. R. Jiracek, V. Maris, G.J. Hill, Y. Ogawa, H. M. Bibby, S.B. Bennie, and W. Heise, The fluid and deformation regime of an advancing subduction system; Marlborough, New Zealand, Nature, 460, 733-736, doi:10.1038/nature08204, 2009.

[46] Aizawa, K., Y. Ogawa, and T. Ishido, Groundwater flow and hydrothermal systems within volcanic edifices: delineation by electric self-potential and magnetotellurics, J. Geophys. Res., 114, B01208, doi:10.1029/2008JB005910, 2009.

2008

[45] Ichihara, H.,R. Honda, T. Mogi, H. Hase, H. Kamiyama, Y. Yamaya and Y. Ogawa, Resistivity structure around focal area of the 2004 southern Rumoi-Nanbu Earthquake (M6.1), Earth Planets Space, 60, 883-888, 2008.

[44] Aizawa, K., Y. Ogawa, T. Hashimoto, T. Koyama, W. Kanda, Y. Yamaya, M. Mishina, T. Kagiyama, Shallow resistivity structure of Asama volcano and its implications for magma ascent process in the 2004 eruption, J. Volcanol. Geotherm. Res., 173, 165-177, 2008.

[43] Yoshimura, R., N. Oshiman, M. Uyeshima, Y. Ogawa, M. Mishina, H. Toh, S. Sakanaka, H. Ichihara, I. Shiozaki, T. Ogawa, T. Miura, S. Koyama, Y. Fujita, K. Nishimura, Y.Takagi, M. Imai, R. Honda, S. Yabe, S. Nagaoka, M. Tada, and T. Mogi, Magnetotelluric observations around the focal region of the 2007 Noto Hanto Earthquake (Mj6.9), Central Japan, Earth Planets Space, 60, 117-122, 2008.

2007

[42] Heise, W., H. M. Bibby, T. G. Caldwell, S.C. Bannister, Y. Ogawa, S. Takakura, and T. Uchida, Melt distribution beneath a young continental rift: The Taupo Volcanic Zone, New Zealand, Geophys. Res. Lett., 34, L14313, doi:10.1029/2007GL029629, 2007.(Highlighted Paper)

[41] Popova I. V., and Y. Ogawa, Application of a modified Hopfield neural network to noisy magnetotelluric data, Izvestiya - Physics of the Solid Earth, 24, 2007.

2006

[40] Toh, H., K. Baba, M. Ichiki, T. Motobayashi, Y. Ogawa, M. Mishina, and I. Takahashi, Two-dimensional electrical section beneath the eastern margin of Japan Sea, Geophys. Res. Lett., 33, L22309, doi:10.1029/2006GL027435, 2006.

[39] Umeda, K., K. Asamori, T. Negi and Y. Ogawa, Magnetotelluric imaging of crustal magma storage beneath Mesozoic crystalline mountains in a non-volcanic region, Northeast Japan, Geochem. Geophys. Geosyst., 7, Q08005 doi:10.1029/2006001247, 2006.

[38] Nurhasan, Y. Ogawa, N. Ujihara, S.B. Tank, Y. Honkura, S. Onizawa, T. Mori, and M. Makino, Two electrical conductors beneath Kusatsu-Shirane volcano, Japan, imaged by audiomagnetotellurics and their implications for hydrothermal system, Earth Planets Space, 58, 1053-1059, 2006.

[37] Umeda, K., Y. Ogawa, K. Asamori, and T. Oikawa, Aqueous fluids derived from a subducting slab: observed high 3He emanation and conductive anomaly in a non-volcanic region, Kii Peninsula southwest Japan, J. Volcanol. Geotherm. Res., 149, 47-61, 2006.

2005

[36] Aizawa, K., R. Yoshimura, N. Oshiman, K. Yamazaki, T. Uto, Y. Ogawa, S. B. Tank, W. Kanda, S. Sakanaka, Y. Furukawa, T. Hashimoto, M. Uyeshima, T. Ogawa, I. Shiozaki, T. Hurst, Hydrothermal System beneath Mt. Fuji volcano inferred from Magnetotellurics and Electric Self-potential, Earth Planet. Sci. Lett., 235, 343-355, 2005.

[35] Uyeshima, M., Y. Ogawa, Y. Honkura, S. Koyama, N. Ujihara, T. Mogi, Y. Yamaya, M.. Harada, S. Yamaguchi, I.Shiozaki, T. Noguchi, Y. Kuwaba, Y. Tanaka, Y. Mochido, N. Manabe, M. Nishihara, M. Saka and M. Serizawa, Resistivity imaging across the source region of the 2004 Mid-Niigata Prefecture earthquake (M6.8), central Japan, Earth Planets Space, 57, 441-446, 2005.

[34] Tank, S.B., Y. Honkura, Y. Ogawa, M. Matsushima, N. Oshiman, M. K. Tuncer, C. Celik, E. Tolak, and A. M. Isikara, Magnetotelluric imaging of the fault rupture area of the 1999 Izmit (Turkey) earthquake, Phys. Earth Planet. Inter., 150, 213-225, 2005.

2004

[33] Ogawa Y. and Y. Honkura, Mid-crustal electrical conductors and their correlations to seismicity and deformation at Itoigawa-Shizuoka Tectonic Line, Central Japan, Earth Planets Space, 56, 1285-1291, 2004.

[32] Rao, C. K., Y. Ogawa, S. G. Gokarn and G. Gupta, Electromagnetic Imaging of magma across the Narmada Son lineament, Central India, Earth Planets Space, 56, 229-238, 2004.

[31] Ujihara, N., Y. Honkura, and Y. Ogawa, Electric and magnetic field variations arising from the seismic dynamo effect for aftershocks of the M7.0 earthquake of 26 May 2003 off Miyagi Prefecture, NE Japan, Earth Planets Space,56, 115-123, 2004.

2003

[30] Tank, S. B., Y. Honkura, Y. Ogawa, N. Oshiman, M. K.Tuncer, C. Celik, E. Tolak, and A. M. Isikara, Resistivity structure in the western part of the fault rupture zone associated with the 1999 Izmit earthquake and its seismogenic implication, Earth Planets Space, 55, 437-442, 2003.

2002

[29] Ogawa, Y., S. Takakura, and Y. Honkura, Resistivity structure across Itoigawa-Shizuoka tectonic line and its implications for concentrated deformation, Earth Planets Space, 54, 1115-1120, 2002.

[28] Ogawa Y., On two-dimensional modeling of magnetotelluric field data, Surveys in Geophysics, 23 (2-3), 251-273, 2002

2001

[27] Mitsuhata, Y., Y. Ogawa Y., M. Mishina, T. Kono, T. Yokokura and T. Uchida, Electromagnetic heterogeneity of the seismogenic region of 1962 M6.5 Northern Miyagi Earthquake, northeastern Japan, Geophys. Res. Lett., 28, 4371-4374, 2001.

[26] Matsushima N., H. Oshima, Y. Ogawa, S. Takakura, H. Satoh, M. Utsugi, and Y. Nishida, Magma prospecting in Usu volcano, Hokkaido, Japan, using magnetotelluric soundings, J. Volcanol. Geotherm. Res., 109 (4), 263-277, 2001

[25] Ogawa Y., M. Mishina, T. Goto, H. Satoh, N. Oshiman, T. Kasaya, Y. Takahashi, T. Nisitani, S. Sakanaka, M. Uyeshima, Y. Takahashi, Y. Honkura, and M. Matsushima, Magnetotelluric imaging of fluids in intraplate earthquakes zones, NE Japan back arc, Geophys. Res. Lett., 28, 3741-3744, https://doi.org/10.1029/2001GL013269, 2001.

[24] Satoh H., Y. Nishida, Y. Ogawa, M. Takada, and M. Uyeshima, Crust and upper mantle resistivity structure in the southwestern end of the Kuril Arc as revealed by the joint analysis of conventional MT and network MT data, Earth Planets Space, 53, 829-842, 2001.

2000

[23] Uchida, T., Y. Ogawa, S. Takakura, and Y. Mitsuhata, Geoelectrical investigation of the Kakkonda geothermal field, northern Japan, Proceedings of World Geothermal Congress 2000, 1893-1898, 2000

1999

[22] Ogawa, Y., H. M. Bibby, T. G. Caldwell, S. Takakura, T. Uchida, N. Matsushima, S. L. Bennie, T. Tosha, Y. Nishi, Wide-band Magnetotelluric Measurements across the Taupo Volcanic Zone, New Zealand - Preliminary Results, Geophys. Res. Lett., 26, 3673-3676, 1999.

[21] Uchida, T., Y. Ogawa, S. Takakura, and Y. Mitsuhata, Three-dimensionality of magnetotelluric data in the Kakkonda geothermal field, northern Japan, Proceedings of the 2nd International Symposium on Three-Dimensional Electromagnetics, 285-288, 1999.

[20] Ogawa Y., Constrained inversion of COPROD-2S2 dataset using model roughness and static shift norm, Earth Planets Space, 51, 1145-1151, 1999.

[19] Fujita, K., Y. Ogawa, M. Ichiki, S. Yamaguchi, and Y. Makino, Audio frequency magnetotelluric survey of Norikura volcano in the central Japan, J.Volcanol.Geotherm.Res., 90, 209-217, 1999.

1998

[18] Ogawa, Y., N. Matsushima, H. Oshima, S. Takakura, M. Utsugi, K. Hirano, M. Igarashi, and T. Doi, A resistivity cross-section of Usu volcano, Hokkaido, Japan, by audiomagnetotellurics soundings, Earth Planets Space, 50, 339-346, 1998.

1997

[17] Ishido,T., T.Kikuchi, N.Matsushima, Y. Yano, S. Nakao, M.Sugihara, T.Tosha, S.Takakura and Y.Ogawa, Repeated self-potential profiling of Izu-Oshima volcano, Japan, J.Geomag.Geoelectr., 49, 1267-1278, 1997.

[16] Fujita, K., Y. Ogawa, S. Yamaguchi, and K. Yaskawa, Magnetotelluric imaging of the SW-Japan forearc, - a lost paleoland revealed?, Phys. Earth Planet. Inter., 102, 231-238, 1997.

[15] Ogawa, Y., and Y. Honkura, F. Ohtani, H. Kuroki, and Y. Mitsuhata, Preliminary magnetotelluric modeling in the Nikko volcanic region -potential break of fluid trap by volcanic intrusion, J.Geomag.Geoelectr., 49, 1073-1078, 1997.

[14] Ogawa, Y., and Y. Honkura, An audiomagnetotelluric view of the Atera fault, J.Geomag.Geoelectr., 49, 1065-1071, 1997.

[13] Ogawa, Y., Data-adaptive inversion of the Oklahoma EMAP dataset, J.Geomag.Geoelectr., 49, 801-806, 1997.

[12] Ogawa Y., Two-dimensional inversion of Papua New Guinea magnetotelluric dataset assuming static shift as Gaussian distribution, J.Geomag.Geoelectr., 49, 857-867, 1997.

1996

[11] Wannamaker, P.E., A.D. Chave, J.R. Booker, A.G. Jones, J.H. Filloux, Y. Ogawa, M. Unsworth, P. Tarits, and R. Evans, Magnetotelluric experiment probes deep physical state of southeastern U.S., EOS, 77, 34, 329-333, 1996.

[10] Ogawa, Y. and T. Uchida, A two-dimensional magnetotelluric inversion assuming Gaussian static shift, Geophys. J. Int., 126, 69-76, https://doi.org/10.1111/j.1365-246X.1996.tb05267.x,1996.

[9] Ogawa, Y., A.G. Jones, M.J. Unsworth, J.R. Booker, X. Lu, J. Craven, B. Roberts, J. Parmelee, and C. Farquharson, Deep electrical conductivity structures of the Appalachian orogen in the southeastern U.S., Geophys. Res. Lett., 23, 1597-1600, https://doi.org/10.1029/95GL03601, 1996.

1995

[8] Avdeev, D., Y. Ogawa, A. Kuvshinov, and O. Pankranov, An interpretation of magnetovariational data in the northern Tohoku district, Japan, using multi sheet modeling, J.Geomag.Geoelectr., 47, 405-410, 1995.

1994

[7] Ogawa, Y., Y. Nishida, M. Makino, A collision boundary imaged by magnetotellurics, Hidaka Mountains, central Hokkaido, Japan, J.Geophys.Res,, 99, 22373-22388, 1994.

[6] Ogawa, Y., M. Uyeshima, Y. Honkura, H. Utada, S. Koyama, Audio-frequency magnetotelluric imaging of an active strike-slip fault, J.Geomag.Geoelectr., 46, 403-408, 1994.

1992

[5] Ogawa, Y., S. Takakura, and T. Soya, Wideband magnetotelluric measurements across Izu-Oshima volcano, J.Geomag.Geoelectr., 44, 561-566, 1992.

1990

[4] Ogawa, Y., and S. Takakura, CSAMT measurement across the 1986 C Craters of Izu-Oshima Island, Japan, J.Geomag.Geoelectr.., 42, 211-224, 1990.

1987

[3] Ogawa, Y., Preliminary interpretation on detailed magnetovariational profilings in the northern Tohoku district, J.Geomag.Geoelectr.,39, 559-569, 1987.

[2] Ogawa, Y., Two-dimensional resistivity modelling based on regional magnetotelluric survey in the northern Tohoku district, northeastern Japan, J.Geomag.Geoelectr., 39, 349-366, 1987.

1986

[1] Ogawa, Y., T.Yukutake, and H. Utada, Two-dimensional modelling of resistivity structure beneath the Tohoku district, northern Honshu Japan, by a finite element method, J.Geomag.Geoelectr., 38,45-79, 1986.