Last Update 04/17 2014
Research: Research on volcano physics based on various types of observation data. Through research on source mechanisms of volcano earthquakes by mainly using seismological techniques, magma migration process from deep magmachamber up to the ground surface through volcanic conduit is investigated. Publications: Mochizuki, E. and T.Ohminato, On the anomalous splitting of earth's free oscillations, Geophys. Res. Lett., 16, 12, doi:10.1029/GL016i012p01415--1416, 1989. Kawakatsu, H., T.Ohminato, H.Ito, Y.Kuwahara, T.Kato, K.Tsuruga, S.Honda and K.Yomogida, Broadband seismic observation at the Sakurajima volcano, Japan, Geophys. Res. Lett., 19, 19, doi:10.1029/92GL01964--1962, 1992. 中尾信典・大湊隆雄・桑原保人・伊藤久男・木口努, VSP法から求めた丹那断層近傍における強いS波偏向異方性, 物理探査, 47, 323--334, 1994. Hitoshi Kawakatsu, Takao Ohminato and Hisao Ito, 10s-period volcanic tremors observed over a wide area in southwestern Japan, Geophys. Res. Lett., 21, 18, doi:10.1029/94GL01683--1966, 1994. Geller, R.J. and T.Ohminato, Computation of synthetic seismograms and their partial derivatives for heterogeneous media with arbitrary natural boundary conditions using the Direct Solution Method, Geophys. J. Int., 116, doi:10.1111/j.1365-246X.1994.tb01807.x--446, 1994. Ohminato, T., H.Ito, Y.Kuwahara, S.Nakao and T.Kiguchi, Vertical seismic profile(VSP) measurement of seismic attenuation due to fractures, Geothermal Science and Technology, 5, 1-2, 111--122, 1995. Ohminato, T., and B. Chouet, A free-surface boundary condition for including 3D topography in the finite-difference method, Bull. Seism. Soc. Am., 87, 2, 494--515, 1997. Ohminato, T.,and D.Ereditato, Broadband seismic observations at Satsuma-Iwojima volcano, Japan, Geophys. Res. Lett., 24, 22, doi:10.1029/97GL02903--2848, 1997. Ohminato, T., B.Chouet, P.Dawson and S.Kedar, Waveform inversion of very long period impulsive signals associated with magmatic injection beneath Kilauea Volcano, Hawai, J. Geophys. Res., 103, B10, doi:10.1029/98JB01122--23,862, 1998. Kumagai, H., T.Ohminato, M.Nakano, M.Ooi, A.Kubo, H.Inoue, and J.Oikawa, Very-long-period seismic signals and caldera formation at Miyake island, Japan, Science, 293, doi:10.1126/science.1062136--690, 2001. Chouet, B., P.Dawson, T.Ohminato, M.Martini, G.Saccorotti, F.Giudicepietro, G.De Luca, G.Milana, and R.Scarpa, Source mechanisms of explosions at Stromboli determined from moment tensor inversions of Very-Long-Period data, J. Geophys. Res., 108, B1, doi:10.1029/2002JB001919--ESE7-25, 2003. 森田裕一・大湊隆雄, 火山における地震観測の発展と成果, 火山, 50, S77--S100, 2005. Kobayashi, T, Y.Ida, and T.Ohminato, Small inflation sources producing seismic and infrasonic pulses during the 2000 eruptions of Miyake-jima, Japan, Earth Planet. Sci. Lett., 240, doi:10.1016/j.epsl.2005.09.015--301, 2005. Ohminato, T., M.Takeo, H.Kumagai, T.Yamashina, J.Oikawa, E.Koyama, H.Tsuji, T.Urabe, Vulcanian eruptions with dominant single force components observed at Asama vocano, Japan, Earth Planets Space, 58, 583--593, 2006. Takeo, M., Y. Aoki, T. Ohminato and M. Yamamoto , Magma supply path beneath Mt. Asama volcano, Japan, Geophys. Res. Lett., 33, doi:10.1029/2006GL026247, , 2006. Ohminato, T., Characteristics and source modeling of broadband seismic signals associated with the hydrothermal system at Satsuma Iwojima volcano, Japan, J. Volcanol. Geotherm. Res., 158, doi:10.101, doi:10.1016/j.jvolgeores.2006.08.004--490, 2006. Nakamichi, H., H. Watanabe and T. Ohminato, Three-dimensional velocity structures of Mount Fuji and the South Fossa Magna, central Japan, J. Geophys. Res., 112, doi:10.1029/2005JB004161, , 2007. Ohminato, T, Source mechnisms of vulcanian eruptions at Mt. Asama, Japan, inferred from volcano seismic signals, Geological Society of London, Special Publication, 307, doi:10.1144/SP307.11--206, 2008. Kobayashi, T., T. Ohminato, Y. Ida and E. Fujita, Very Long Period seismic signals observed before the caldera formation with the 2000 Miyake-jima volcanic activity, Japan, J. Geophys. Res., 114, doi:10.1029/2007JB005557, , 2009. Y. Aoki, M. Takeo, H. Aoyama, J. Fujimatsu, S. Matsumoto, H. Miyamachi, H. Nakamichi, T. Ohkura, T. Ohminato, J. Oikawa, R. Tanada, T. Tsutsui, K. Yamamoto, M. Yamamoto, H. Yamasato, T. Yamawaki, P-wave velocity structure beneath AsamaVolcano, Japan, inferred from active sourceseismic experiment, J. Volcanol. Geotherm. Res., 187, doi:10.1016/j.jvolgeores.2009.09.004--277, 2009. R. Kazahaya, T. Mori, M. Takeo, T. Ohminato, T. Urabe, and Y. Maeda, Relation between single very‐long‐period pulses and volcanic gas emissions at Mt. Asama, Japan, Geophys. Res. Lett., 38, doi:10.1029/2011GL047555, , 2011. Maeda, Y., M. Takeo, T. Ohminato, A waveform inversion including tilt:method and simple test, Geophys. J. Int., 184, doi:10.1111/j.1365-246X.2010.04892.x--918, 2011. T. Kobayashi, T.Ohminato, Y. Ida, and E. Fujita, Intermittent Inflations Recorded by Broadband Seismometers Prior to Caldera Formation at Miyake-jima Volcano in 2000, Earth Planet. Sci. Lett., 357-358, doi:10.1016/j.epsl.2012.09.039, , 2012. Takao Koyama, T. Kaneko, T. Ohminato, T. Yanagisawa, A. Watanabe, M. Takeo, An aeromagnetic survey of Shinmoe-dake volcano、Kirishima, Japan, after the 2011 eruption using an unmanned autonomous helicopter, Earth Planets Space, 65, doi:10.5047/eps.2013.03.005, , 2013. Y. Aoki, M. Takeo, T. Ohminato, Y. Nagaoka, K. Nishida, Structural controls on magma pathways beneath Asama volcano, Japan, Geological Society London Special Publication, Geological Society of London, Special Publication, 380, doi:10.1144/SP380.6, , 2013. |
