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タイトル: | Changes in permeability of the Nojima fault damage zone inferred from repeated water injection experiments |
著者: | Kitagawa, Yuichi Kano, Yasuyuki |
著者名の別形: | 加納, 靖之 |
キーワード: | 1995 Hyogoken-Nanbu earthquake Nojima fault Permeability Water injection experiment Healing |
発行日: | 21-Nov-2016 |
出版者: | Springer Nature |
誌名: | Earth, Planets and Space |
巻: | 68 |
論文番号: | 185 |
抄録: | In 1995, the Hyogoken-Nanbu earthquake (M 7.3) ruptured the Nojima fault, Awaji Island, central Japan. To investigate the recovery process of a fault zone after a large earthquake, repeated water injection experiments have been conducted every few years in an 1800-m-long borehole near the Nojima fault since 1997. In addition, the groundwater discharge rate and pressure have been observed in an 800-m borehole. From the resulting data, the macroscopic permeability of the fault fracture zone was estimated to range roughly from 1 × 10−6 to 2 × 10−6 m/s. The macroscopic permeability of the fault fracture zone decreased until 2003, and then, it stabilized or increased slightly through 2006. These changes in permeability indicate that the fault fracture zone stabilized within 8 years after the occurrence of the earthquake. |
著作権等: | © 2016 The Author(s). This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
URI: | http://hdl.handle.net/2433/218903 |
DOI(出版社版): | 10.1186/s40623-016-0566-2 |
出現コレクション: | 学術雑誌掲載論文等 |
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