Zobrazeno 1 - 10
of 270
pro vyhledávání: '"Katsuaki Koike"'
Publikováno v:
Journal of MMIJ, Vol 140, Iss 6, Pp 101-111 (2024)
Although seafloor hydrothermal deposits are essential metal resources because of their considerable reserves and high metal grades, the concrete physical setting that causes their generation remains unclear. These can be clarified only through numeri
Externí odkaz:
https://doaj.org/article/0aa269b114a74cefabdde6c9242cc271
Autor:
Yusuke Ohta, Tada-nori Goto, Katsuaki Koike, Koki Kashiwaya, Weiren Lin, Osamu Tadai, Takafumi Kasaya, Toshiya Kanamatsu, Hideaki Machiyama
Publikováno v:
Earth, Planets and Space, Vol 76, Iss 1, Pp 1-17 (2024)
Abstract The physical properties of seafloor massive sulfides are crucial for interpreting sub-seafloor images from geophysical surveys, shedding light on the evolution of seafloor mineral deposits. While some studies have explored the relationship b
Externí odkaz:
https://doaj.org/article/157296ef55f54299b8444c4b36679e51
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-10 (2023)
Abstract This study presented the first attempt to detect precursory changes in groundwater level before the 2016 Kumamoto Earthquake. This detection was achieved by accurately determining the relationship between long-term groundwater level fluctuat
Externí odkaz:
https://doaj.org/article/e0674873f4e1443f90bb65b9c6722476
Autor:
Vu Thi Thu Thuy, Nguyen Thi Thu Ha, Katsuaki Koike, Nguyen Thien Phuong Thao, Pham Ngoc Trung, Dinh Xuan Thanh
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 15, Pp 2696-2708 (2022)
Sediment properties such as water content (WC) and grain size (GS) are essential to characterize the environmental conditions of tidal flats. This article aimed to develop appropriate models to estimate the WC and GS of surface sediments for an inter
Externí odkaz:
https://doaj.org/article/e80d05c2bbc047fba40a44b952b9cd20
Autor:
Koki Aizawa, Shinichi Takakura, Hisafumi Asaue, Katsuaki Koike, Ryokei Yoshimura, Ken’ichi Yamazaki, Shintaro Komatsu, Mitsuru Utsugi, Hiroyuki Inoue, Kaori Tsukamoto, Makoto Uyeshima, Takao Koyama, Wataru Kanda, Tohru Yoshinaga, Nobuo Matsushima, Kazunari Uchida, Yuko Tsukashima, Takeshi Matsushima, Hiroshi Ichihara, Dan Muramatsu, Yoshiko Teguri, Azusa Shito, Satoshi Matsumoto, Hiroshi Shimizu
Publikováno v:
Earth, Planets and Space, Vol 73, Iss 1, Pp 1-12 (2021)
Abstract Crustal earthquake ruptures tend to initiate near fluid-rich zones. However, it is relatively unknown whether fluid-rich zones can further promote or arrest these ruptures. We image the electrical resistivity structure around the focal area
Externí odkaz:
https://doaj.org/article/6acd1be115b24e069e30dddacf443228
Publikováno v:
Earth, Planets and Space, Vol 72, Iss 1, Pp 1-19 (2020)
Abstract Spatial gradients in the primary geomagnetic fields directly contribute to both the amplitudes and phases of inter-station transfer functions (IS-TFs). This suggests that, for the analysis of subsurface resistivity structures, IS-TFs should
Externí odkaz:
https://doaj.org/article/f809e34da64349b8a0244aea79143c25
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 23, Iss 1, Pp n/a-n/a (2022)
Abstract The Mw 7.0 mainshock of the 2016 Kumamoto earthquake sequence was triggered by dextral rupture of the Futagawa fault within the Aso volcanic region, Southwestern Japan. To reproduce its faulting patterns and to reveal the geological and geop
Externí odkaz:
https://doaj.org/article/086dafea218e4b7daa3f968fe9281b44
Publikováno v:
Natural Resources Research. 32:955-980
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d73a24be16b38e50cc63deeb26df432
https://doi.org/10.1007/s11053-023-10160-0
https://doi.org/10.1007/s11053-023-10160-0
Publikováno v:
Natural Resources Research. 32:129-145
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c88ebf6d779025758ab9aa391c3e9cee
https://doi.org/10.1007/s11053-022-10139-3
https://doi.org/10.1007/s11053-022-10139-3
Autor:
Satoshi HIROOKA, Tatsuya YAMAGUCHI, Toshifumi WATABE, Nobuya YAMAMOTO, Kunihiro JODAI, Naotoshi YASUDA, Kazuhiko TSUKADA, Katsuaki KOIKE, Toshihiro ASAKURA
Publikováno v:
Journal of MMIJ, Vol 133, Iss 5, Pp 98-106 (2017)
In addition to hydrological characterization of water-sealed type underground rock caverns, their mechanical stability is constantly monitored by measuring several properties, such as earthquake-induced vibration, strain, and tilt. Among them, tilt m
Externí odkaz:
https://doaj.org/article/eba41207390c403eb9164dd6c41cbe42