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Very-low-frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prism
https://nied-repo.bosai.go.jp/records/4519
https://nied-repo.bosai.go.jp/records/45199a1c5e65-84de-432b-922b-5e008251709f
| 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 | Very-low-frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prism | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| 著者 |
Yoshihiro Ito
× Yoshihiro Ito
× Youichi Asano
× Kazushige Obara
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| 抄録 | ||||||||||||
| 内容記述タイプ | Other | |||||||||||
| 内容記述 | We investigated the stress field within the Nankai accretionary prism of southwestern Japan, where very-low-frequency (VLF) earthquakes occur associated with thrust faulting. A northwest-southeast azimuth of the maximum horizontal principal stress previously estimated from borehole breakouts in wells drilled in the region by deep-sea drilling vessel Chikyu suggests trench-normal shortening, although strike-slip and normal faulting are also possible within a thrust-dominated tectonic environment. We estimated stress orientations and stress ratios by using stress tensor inversion to derive moment tensor solutions for VLF earthquakes in three regions along the Nankai Trough: off Kumano, off Muroto, and Hyuga-nada. The stress orientations we obtained indicate that the regions off Kumano and off Muroto are within a transpressional stress regime with trench-normal shortening, whereas the Hyuga-nada region on the westernmost edge of the Nankai accretionary prism is in a reverse-faulting regime. Citation: Ito, Y., Y. Asano, and K. Obara (2009), Very-low-frequency earthquakes indicate a transpressional stress regime in the Nankai accretionary prism, Geophys. Res. Lett., 36, L20309, doi:10.1029/2009GL039332. | |||||||||||
| 言語 | en | |||||||||||
| 書誌情報 |
en : GEOPHYSICAL RESEARCH LETTERS 巻 36, 発行日 2009-10 |
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| 出版者 | ||||||||||||
| 言語 | en | |||||||||||
| 出版者 | AMER GEOPHYSICAL UNION | |||||||||||
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| 収録物識別子タイプ | EISSN | |||||||||||
| 収録物識別子 | 1944-8007 | |||||||||||
| DOI | ||||||||||||
| 関連識別子 | 10.1029/2009GL039332 | |||||||||||
