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Narumi Takahashi, Shuichi Kodaira, Jin-Oh Park and John Diebold. Heterogeneous structure of westem Nankai seismogenic zone deduced by multichannel reflection data and wide-angle seismic data
https://nied-repo.bosai.go.jp/records/4417
https://nied-repo.bosai.go.jp/records/4417ce4183a3-0438-4102-8e46-912d50a186b5
| Item type | researchmap(1) | |||||||||||||
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| 公開日 | 2023-03-30 | |||||||||||||
| タイトル | ||||||||||||||
| 言語 | en | |||||||||||||
| タイトル | Narumi Takahashi, Shuichi Kodaira, Jin-Oh Park and John Diebold. Heterogeneous structure of westem Nankai seismogenic zone deduced by multichannel reflection data and wide-angle seismic data | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 著者 |
N Takahashi
× N Takahashi
× S Kodaira
× JO Park
× J Diebold
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | The 1946 Nankai earthquake (Ms = 8.2) at the forearc region of the western Nankai Trough showed slow slip deformation off Cape Muroto, which did not propagate until the western end of the Nankai seismogenic zone. New seismic investigations show a low-velocity layer (LVL) on the subducting oceanic crust in the coseismic area. Two prestack depth-migrated sections show reflectivity events in the clay-rich boundary layer on the oceanic crust. Narrowly spaced imbricated slices develop in the nonrupture area. The reflective boundary layer indicates probably that underplating develops in the nonrupture area rather than the coseismic area. It is suggested that the friction is larger in the nonrupture area than the coseismic area because of the lack of LVL on the oceanic crust, the well developed underplating and the narrowly spaced imbricated thrusts in the nonrupture area. The topographic high of the oceanic crust with about 50 km width and maximum 3 km height is also revealed and is related to bending and thickening of the oceanic crust. These structural characters may be the reason why the slow slip deformation did not propagate until the western end of the Nankai seismogenic zone and toward the trough side. (C) 2003 Elsevier Science B.V. All rights reserved. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
en : Tectonophsics 巻 364, 号 3/4, p. 167-190 |
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| 出版者 | ||||||||||||||
| 言語 | en | |||||||||||||
| 出版者 | ELSEVIER SCIENCE BV | |||||||||||||
| ISSN | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 0040-1951 | |||||||||||||
| DOI | ||||||||||||||
| 関連識別子 | 10.1016/S0040-1951(03)00057-X | |||||||||||||
