(1) Research papers
Tülay Kaya-Eken, Yasuo Ogawa, Yoshiya Usui, Takafumi Kasaya, M. Kemal Tunçer, Yoshimori Honkura, Naoto Oshiman, Masaki Matsushima, Weerachai Siripunvaraporn, 2025, 3-D electromagnetic imaging of highly deformed fluid-rich weak zones and locked section of the North Anatolian fault beneath the Marmara Sea, Geology. doi.org/10.1130/G52995.1. New
Yoshiya Usui, Makoto Uyeshima, Shin'ya Sakanaka, Yusuke Yamaya, Yasuo Ogawa, Masahiro Ichiki, Yoshimori Honkura, Hidekuni Kuroki, Group for MT observation around the Northern Kanto area, 2025, Crustal fluids and their relation to seismic activities in the Nikko-Ashio area of Northeastern Japan inferred by electrical resistivity imaging, Tectonophysics. doi.org/10.1016/j.tecto.2025.230958.
Song, H., Usui, Y., Uyeshima, M. et al. Revealing the Non-uniqueness Inherent in MT Inversion: A Comparative Study of Influential Factors and Algorithm-Dependent Uncertainties in FEMTIC and ModEM with USArray MT Data. Surv Geophys (2025). doi.org/10.1007/s10712-025-09901-y
Usui, Y., Uyeshima, M. Three-dimensional combined inversion method of the MT and Network-MT response functions. Earth Planets Space, 77, 135 (2025). doi.org/10.1186/s40623-025-02266-x
Yoshiya Usui, Makoto Uyeshima, Shin'ya Sakanaka, Tasuku Hashimoto, Masahiro Ichiki, Toshiki Kaida, Yusuke Yamaya, Yasuo Ogawa, Masataka Masuda, Takahiro Akiyama, 2025, Application of the fast and robust bootstrap method to the uncertainty analysis of the magnetotelluric transfer function, Geophysical Journal International, 242(1), https://doi.org/10.1093/gji/ggaf162
Usui, Y., 2024. Prewhitening of magnetotelluric data using a robust filter and robust PARCOR. Bull. Earthq. Res. Inst. Univ. Tokyo, 99, https://doi.org/10.15083/0002012817
Diba, D., Song, H., Uyeshima, M., & Usui, Y., 2025. 3D magnetotelluric inversion with structurally guided regularization constraint. Physics of the Earth and Planetary Interiors, https://doi.org/10.1016/j.pepi.2025.107333
Yoshiya Usui, Electrical conductivity model for transversely isotropic rocks with interconnected cracks, Physics of the Earth and Planetary Interiors, 354, 2024, https://doi.org/10.1016/j.pepi.2024.107226
Yoshiya Usui, Makoto Uyeshima, Shin'ya Sakanaka, Tasuku Hashimoto, Masahiro Ichiki, Toshiki Kaida, Yusuke Yamaya, Yasuo Ogawa, Masataka Masuda, Takahiro Akiyama, New robust remote reference estimator using robust multivariate linear regression, Geophysical Journal International, 2024, 238(2), https://doi.org/10.1093/gji/ggae199
Usui, Y., Uyeshima, M., Hase, H., Ichihara, H., Aizawa, K., Koyama, T., et al. (2024). Three-dimensional electrical resistivity structure beneath a strain concentration area in the back-arc side of the northeastern Japan arc. Journal of Geophysical Research: Solid Earth, 129(5), http://doi.org/10.1029/2023JB028522
Diba D, Nurhasan, Uyeshima M, Usui Y, Two-dimensional magnetotelluric inversion using unstructured triangular mesh implemented in Julia. J. Phys. Conf. Ser., 2734 012008, 2024.
W. Heise, S. Bannister, C. A. Williams, P. McGavin, T. G. Caldwell, E. A. Bertrand, Y. Usui, G. Kilgour, Magmatic priming of a phreatic eruption sequence: The 2012 Te Maari eruptions at Mt Tongariro (New Zealand) imaged by Magnetotellurics and Seismicity, Geophys. J. Int., https://doi.org/10.1093/gji/ggae022, 2024.
D. Diba, M. Uyeshima, M. Ichiki, S. Sakanaka, M. Tamura, Y. Yuan, M. Gresse, Y. Yamaya and Y. Usui, On a large magmatic fluid reservoir oblique to the volcanic front in the southern part of NE Japan revealed by the magnetotelluric survey, Earth Planets Space, 75:146, doi.org/10.1186/s40623-023-01899-0, 2023.
Y. Usui, M. Uyeshima, T. Ogawa, R. Yoshimura, N. Oshiman, S. Yamaguchi, H. Toh, H. Murakami, K. Aizawa, T. Tanbo, Y. Ogawa, T. Nishitani, S. Sakanaka, M. Mishina, H. Satoh, T. Goto, T. Kasaya, T. Mogi, Y. Yamaya, I. Shiozaki and Y. Honkura, 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, doi.org/10.1029/2020JB020904 , 2021.
K. H. Tseng, Y. Ogawa, Nurhasan, S. B. Tank, N. Ujihara, Y. Honkura, A. Terada, Y. Usui and W. Kanda, Anatomy of active volcanic edifce at the Kusatsu–Shirane volcano, Japan, by magnetotellurics: hydrothermal implications for volcanic unrests, Earth Planets Space, 72:161, doi.org/10.1186/s40623-020-01283-2, 2020.
R. Yoshimura, Y. Ogawa, Y. Yukutake, W. Kanda, S. Komori, H. Hase, T. Goto, R. Honda, M. Harada, T. Yamazaki, M. Kamo, S. Kawasaki, T. Higa, T. Suzuki, Y. Yasuda, M. Tani and Y. Usui, Resistivity characterisation of Hakone volcano, Central Japan, by three-dimensional magnetotelluric inversion, Earth Planets Space, 70:66, doi.org/10.1186/s40623-018-0848-y , 2018.
Y. Usui, T. Kasaya, Y. Ogawa and H. Iwamoto, Marine magnetotelluric inversion with an unstructured tetrahedral mesh, Geophys. J. Int., 214(2): 952-974, doi.org/10.1093/gji/ggy171, 2018.
Y. Usui, 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, doi.org/10.1093/gji/ggw459, 2017.
Y. Usui, 3-D inversion of magnetotelluric data using unstructured tetrahedral elements: applicability to data affected by topography, Geophys. J. Int., 202 (2): 828-849, doi.org/10.1093/gji/ggv186, 2015.
H. Ichihara, M. Uyeshima, S. Sakanaka, T. Ogawa, M. Mishina, Y. Ogawa, T. Nishitani, Y. Yamaya, A. Watanabe, Y. Morita, R. Yoshimura and Y. Usui, A fault-zone conductor beneath a compressional inversion zone, northeastern Honshu, Japan, Geophys. Res. Lett., 38, L09301, doi.org/10.1029/2011GL047382, 2011.