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神戸大学 理学研究科 惑星学専攻・惑星学科 Home Page

STAFF

Takuto MINAMI

 Assistant Professor
 Graduate School of Science
 Faculty of Science

  • e-mail: tminami (at) port.kobe-u.ac.jp
  • Office: The Graduate School of Science and Technology Bldg 3, room 625
  • Mailing address: Department of Earth and Planetary Sciences, Graduate School of Science, Kobe University, Nada, Kobe 657-8501, Japan
  • Marine Geodynamics Laboratory WEB



Research Interests:

1) Crust and Mantle dynamics
2) Interaction of volcanos and hydrothermal systems
3) Electromagnetic phenomena triggered by earthquakes and tsunamis

My research interests include soundings of crust, mantle and volcanos using electromagnetic methods. Electromagnetic soundings are applicable with a wide range of variation periods. I mainly focus on studying evolution of hydrothermal systems of volcanos with short periods of 1 to 1000 Hz, and oceanic mantle structure with long periods of ~10000 sec. Electromagnetic phenomena occurring during large earthquakes and tsunamis are also my targets. Tsunamis cause electrical current systems in the ocean, which frequently generate secondary magnetic variation observable on the seafloor and at on-land observatories along coastlines. I study this phenomenon for the purpose of developing a new method for tsunami early warning.


Recent Publications: 

  • Lin, Z., Toh, H., & Minami, T. Direct Comparison of the Tsunami‐Generated Magnetic Field With Sea Level Change for the 2009 Samoa and 2010 Chile Tsunamis. Journal of Geophysical Research: Solid Earth, 126(11), e2021JB022760,doi.org/10.1029/2021JB022760, 2021.
  • Alken, P., Thebault, E., Beggan, C. D., Amit, H., Aubert, J., Baerenzung, J., Bondar, T. N., Brown, W. J., Califf, S., Chambodut, A., Chulliat, A., Cox, G. A., Finlay, C. C., Fournier, A., Gillet, N., Grayver, A., Hammer, M. D., Holschneider, M., Huder, L., Hulot, G., Jager, T., Kloss, C., Korte, M., Kuang, W., Kuvshinov, A., Langlais, B., Leger, J.-M., Lesur, V., Livermore, P. W., Lowes, F. J., Macmillan, S., Magnes, W., Mandea, M., Marsal, S., Matzka, J., Metman, M. C., Minami, T., Morschhauser, A., Mound, J. E., Nair, M., Nakano, S., Olsen, N., Pavon-Carrasco, F. J., Petrov, V. G., Ropp, G., Rother, M., Sabaka, T. J., Sanchez, S., Saturnino, D., Schnepf, N. R., Shen, X., Stolle, C., Tangborn, A., Toffner-Clausen, L., Toh, H., Torta, J. M., Varner, J., Vervelidou, F., Vigneron, P., Wardinski, I., Wicht, J., Woods, A., Yang, Y., Zeren, Z., and Zhou, B. International Geomagnetic Reference Field: the thirteenth generation. Earth, Planets and Space, 73, 49, doi:10.1186/s40623-020-01288-x, 2021.
  • Minami, T., Schnepf, N. and Toh, H. Tsunami-generated magnetic fields have primary and secondary arrivals like seismic waves. Scientific Reports, 11, 2287, doi:10.1038/s41598-021-81820-5, 2021.
  • Minami, T., Nakano, S., Lesur, V., Takahashi, F., Matsushima, M., Shimizu, H., Nakashima, R., Taniguchi, H. and Toh, H. A candidate secular variation model for IGRF-13 based on MHD dynamo simulation and 4DEnVar data assimilation. Earth, Planets and Space, 72, 136, doi:10.1186/s40623-020-01253-8, 2020.
  • Minami, T., Utsugi, M., Utada, H., Kagiyama, T. and Inoue, H. Temporal variation in the resistivity structure of the first Nakadake crater, Aso volcano, Japan, during the magmatic eruptions from November 2014 to May 2015, as inferred by the ACTIVE electromagnetic monitoring system. Earth, Planets and Space, 70(1), 138, doi:10.1186/s40623-018-0909-2, 2018. (EPS Highlighted Papers 2018)
  • Minami, T., Toh, H., Ichihara, H. and Kawashima I. Three-Dimensional Time Domain Simulation of Tsunami-Generated Electromagnetic Fields: Application to the 2011 Tohoku Earthquake Tsunami. Journal of Geophysical Research: Solid Earth, 122(12), 9559-9579, doi:10.1002/2017JB014839, 2017. (JGR Solid Earth Editor's Highlight)
  • Minami, T. Motional induction by tsunamis and ocean tides: 10 years of progress. Surveys in Geophysics, 38(5), 1097-1132, doi:10.1007/s10712-017-9417-3,2017.
  • Tyler, R. H., Boyer, T. P., Minami, T., Zweng, M. M. and Reagan, J. R. Electrical conductivity of the global ocean. Earth, Planets and Space, 69(1), 156, doi:10.1186/s40623-017-0739-7, 2017.
  • Minami, T., Toh, H. and Tyler, R. H. Properties of electromagnetic fields generated by tsunami first arrivals: Classification based on the ocean depth, Geophysical Research Letters, 2015GL063055, doi:10.1002/2015GL063055, 2015.
  • Minami, T. and Toh, H. Two-dimensional simulations of the tsunami dynamo effect using the finite element method, Geophysical Research Letters, Vol. 40, 4560-4564, doi:10.1002/grl.50823, 2013.
  • Minami, T. and Toh, H. An improved forward modeling method for two-dimensional electromagnetic induction problems with bathymetry, Earth Planets Space,Vol. 64, e9-e12, doi:10.5047/eps.2012.04.012, 2012.
  • Toh, H. and Minami, T. Electromagnetic View of the Seismogenic Zones Beneath Island Arcs, in Earthquake Research and Analysis - Seismology, Seismotectonic and Earthquake Geology, Chapter 9, 183-198, 2012.


Academic Associations: 



                                           UPDATE: 21 Jan. 2022

     

Department of Planetology, Graduate School of Science, Kobe University

ADDRESS
1-1, Rokkodai-cho, Nada-ku, Kobe, Hyogo, Japan, 657-8501

TEL: (+81)-78-803-6483
FAX :(+81)-78-803-5791