Koyama Takao

Research field (1)： Solid earth science

Research keywords (3)：火山体比抵抗構造 , 地球内部電磁気学 , 3次元比抵抗構造解析

Research theme for competitive and other funds (16)：

2024 - 2028 Unveiling of the Preparation Process and Hazard Assessment of Phreatic Explosions in Volcanoes - An Approach Using Unmanned Aeromagnetic Survey
2024 - 2028 Solid State Ionics under extreme conditions of Earth's deep interior
2023 - 2027 Verification of superionic state of the subducting oceanic plate by high-pressure experiments, theoretical calculations, and electromagnetic sounding analysis
2020 - 2024 電離層数値モデルと陸上・海底磁場データを組込んだマントル遷移層描像手法の新展開
2019 - 2021 地球物理・地球化学的複合アプローチによる火山噴火準備過程の解明

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Papers (58)：

Yoshiya Usui, Makoto Uyeshima, Hideaki Hase, Hiroshi Ichihara, Koki Aizawa, Takao Koyama, Shin'ya Sakanaka, Tsutomu Ogawa, Yusuke Yamaya, Tadashi Nishitani, et al. 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. 2024. 129. 5
Asami Honda, Wataru Kanda, Takao Koyama, Shinichi Takakura, Yasuo Matsunaga, Tatsuji Nishizawa, Satoshi Ikezawa. Shallow resistivity structure around the 2018 craters of Mt. Motoshirane of Kusatsu-Shirane Volcano, Japan, revealed by audio-frequency magnetotellurics. Earth, Planets and Space. 2023. 75. 1
Koki Aizawa, Dan Muramatsu, Takeshi Matsushima, Takao Koyama, Makoto Uyeshima, Shigeru Nakao. Phreatic volcanic eruption preceded by observable shallow groundwater flow at Iwo-Yama, Kirishima Volcanic Complex, Japan. Communications Earth and Environment. 2022. 3. 1
Yasuo Matsunaga, Wataru Kanda, Takao Koyama, Shinichi Takakura, Tatsuji Nishizawa. Large-scale magmatic-hydrothermal system of Kusatsu-Shirane Volcano, Japan, revealed by broadband magnetotellurics. Journal of Volcanology and Geothermal Research. 2022. 429. 107600-107600
Takao Koyama, Takayuki Kaneko, Takao Ohminato, Atsushi Watanabe, Yoshiaki Honda, Takahiro Akiyama, Shinichi Tanaka, Marceau Gresse, Makoto Uyeshima, Yuichi Morita. Magnetization Structure and its Temporal Change of Miyakejima Volcano, Japan, Revealed by Uncrewed Aerial Vehicle Aeromagnetic Survey. Journal of Disaster Research. 2022. 17. 5. 644-653

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MISC (61)：

TADA Noriko, ICHIHARA Hiroshi, NAKANO Masaru, UTSUGI Mitsuru, KOYAMA Takao, KUWATANI Tatsu, BABA Kiyoshi, MAENO Fukashi, TAKAGI Akimichi, TAKEO Minoru. Aeromagnetic survey of Nishinoshima volcano by using drone: the current situation and future outlook. 地球電磁気・地球惑星圏学会総会及び講演会(Web). 2021. 150th
Tada Noriko, Ichihara Hiroshi, Nakano Masaru, Utsugi Mitsuru, Koyama Takao, Baba Kiyoshi, Takagi Akimichi, Maeno Fukashi, Takeo Minoru. Magnetization structure beneath Nishinoshima by using drones. PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN. 2020. 2020. 93-93
Matsunaga Yasuo, Kanda Wataru, Takakura Shinichi, Koyama Takao, Nisizawa Tatsuji. Preliminary resistivity structure model around Kusatsu-Shirane Volcano revealed by broadband Magnetotellurics. PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN. 2020. 2020. 15-15
相澤広記, 内田和也, 塚島祐子, 湯浅雄平, 村松弾, 山本有人, TRIAHADINI Agnis, 藤田詩織, 橋本匡, 千葉慶太, et al. Three dimensional resistivity structure around Amakusa to Minami-Shimabara aseismic zone. 日本地球惑星科学連合大会予稿集(Web). 2020. 2020
小川康雄, 青山裕, 山本希, 筒井智樹, 寺田暁彦, 大倉敬宏, 神田径, 小山崇夫, 金子隆之, 大湊隆雄, et al. 2018年草津白根火山噴火に関する総合調査 --草津白根山火山噴火から1年--. 自然災害科学総合シンポジウム講演論文集. 2019. 56. 1-5

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Work history (3)：

2005/07 - 現在 The University of Tokyo, Earthquake Research Institute
2012/03 - 2013/03 ETH Zurich
2002/04 - 2005/06 Japan Agency for Marine-Earth Science and Technology

Awards (1)：

2022/05 - 地球電磁気・地球惑星圏学会 2022年地球電磁気・地球惑星圏学会論文賞

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