Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Koichiro Obana"'
Autor:
Toshitaka Baba, Tetsuo No, Koichiro Obana, Kentaro Imai, Naotaka Chikasada, Yuichiro Tanioka, Shuichi Kodaira
Publikováno v:
Earth, Planets and Space, Vol 76, Iss 1, Pp 1-14 (2024)
Abstract The southern Kuril Trench is one of the most seismically active regions in the world. In this study, marine surveys and observations were performed to construct fault models for possible outer-rise earthquakes. Seismic and seafloor bathymetr
Externí odkaz:
https://doaj.org/article/b4d01d0344bf4dcdb03ba5cb08276610
Autor:
Gou Fujie, Shuichi Kodaira, Koichiro Obana, Yojiro Yamamoto, Takehi Isse, Tomoaki Yamada, Tetsuo No, Yasuyuki Nakamura, Seiichi Miura
Publikováno v:
Progress in Earth and Planetary Science, Vol 10, Iss 1, Pp 1-28 (2023)
Abstract Devastating megathrust earthquakes and slow earthquakes both occur along subducting plate interfaces. These interplate seismic activities are strongly dependent on the nature of the plate interface, such as the shape of the plate interface a
Externí odkaz:
https://doaj.org/article/f573890f67d24f42b2ad2eac26eec2eb
Autor:
Yasuyuki Nakamura, Shuichi Kodaira, Gou Fujie, Mikiya Yamashita, Koichiro Obana, Seiichi Miura
Publikováno v:
Progress in Earth and Planetary Science, Vol 10, Iss 1, Pp 1-21 (2023)
Abstract The structure of the incoming plate is an important element that is often considered to be related to the occurrence of great earthquakes in subduction zones. In the Japan Trench, where the 2011 Tohoku earthquake occurred, we collected seism
Externí odkaz:
https://doaj.org/article/0ea0060b6d1b4094a6bc2564ef59e22f
Autor:
Jesse Hutchinson, Honn Kao, Michael Riedel, Koichiro Obana, Kelin Wang, Shuichi Kodaira, Tsutomu Takahashi, Yojiro Yamamoto
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-16 (2023)
Abstract At the northern Cascadia subduction zone, the subducting Explorer and Juan de Fuca plates interact across a transform deformation zone, known as the Nootka fault zone (NFZ). This study continues the Seafloor Earthquake Array Japan Canada Cas
Externí odkaz:
https://doaj.org/article/f097ca7f59ae4f4fba2ff6981824cc3a
Autor:
Koichiro Obana, Tsutomu Takahashi, Yojiro Yamamoto, Takeshi Iinuma, Yasuyuki Nakamura, Gou Fujie, Seiichi Miura, Shuichi Kodaira
Publikováno v:
Progress in Earth and Planetary Science, Vol 10, Iss 1, Pp 1-19 (2023)
Abstract Since the 2011 Mw 9.0 Tohoku-oki earthquake, intra-plate normal-faulting earthquakes, including several M7-class earthquakes, have occurred in the outer trench slope area from the trench to the outer rise along the Japan Trench. Concerns reg
Externí odkaz:
https://doaj.org/article/5f8e98d0f36d40b79fec391c0da26373
Autor:
Hiroyuki Matsumoto, Eiichiro Araki, Toshinori Kimura, Gou Fujie, Kazuya Shiraishi, Takashi Tonegawa, Koichiro Obana, Ryuta Arai, Yuka Kaiho, Yasuyuki Nakamura, Takashi Yokobiki, Shuichi Kodaira, Narumi Takahashi, Robert Ellwood, Victor Yartsev, Martin Karrenbach
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract A ship-based seismic survey was conducted close to a fiber-optic submarine cable, and 50 km-long distributed acoustic sensing (DAS) recordings with air-gun shots were obtained for the first time. We examine the acquired DAS dataset together
Externí odkaz:
https://doaj.org/article/ed3c6ae66ce0407797cc3133815c9688
Autor:
Aki Ito, Takashi Tonegawa, Naoki Uchida, Yojiro Yamamoto, Daisuke Suetsugu, Ryota Hino, Hiroko Sugioka, Koichiro Obana, Kazuo Nakahigashi, Masanao Shinohara
Publikováno v:
Earth, Planets and Space, Vol 71, Iss 1, Pp 1-23 (2019)
Abstract We applied tomographic inversion and receiver function analysis to seismic data from ocean-bottom seismometers and land-based stations to understand the structure and its relationship with slow slip events off Boso, Japan. First, we delineat
Externí odkaz:
https://doaj.org/article/4b28cfc841f148268f2fea4b05c25b62
Publikováno v:
Earth, Planets and Space, Vol 70, Iss 1, Pp 1-12 (2018)
Abstract The uppermost structures of incoming oceanic plates have been investigated by seismic exploration surveys, primarily based on two-dimensional profiles. However, their regional-scale lateral variations and shear wave velocity structures with
Externí odkaz:
https://doaj.org/article/24406f7dc68d4a6aa3534e455d822a6d
Autor:
Aki Ito, Yojiro Yamamoto, Ryota Hino, Daisuke Suetsugu, Hiroko Sugioka, Masaru Nakano, Koichiro Obana, Kazuo Nakahigashi, Masanao Shinohara
Publikováno v:
Earth, Planets and Space, Vol 69, Iss 1, Pp 1-10 (2017)
Abstract We determined the three-dimensional structure of the crust and upper mantle off the Boso Peninsula, Japan, by analyzing seismograms recorded by ocean-bottom seismometers and land stations between 2011 and 2013. We employed seismic tomography
Externí odkaz:
https://doaj.org/article/4a4fcf3c2d8244d598104919a97baaa9
Publikováno v:
International Journal of Geophysics, Vol 2012 (2012)
Seismic interferometry (SI) has been recently employed to retrieve the reflection response from natural earthquakes. We perform experimental study to apply SI to Ocean Bottom Seismogram (OBS) records in the Nankai Trough, southwest Japan in order to
Externí odkaz:
https://doaj.org/article/8e7db3d159f347abaa31d644e1a88172