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Preseismic groundwater gas anomalies at Nagashima spa near Nagoya for the M=5.7 earthquake (Oct. 31, 2000) in southern Mie Prefecture, Japan: An episodic subsurface process related to the 2001 Tokai silent earthquake
https://doi.org/10.18999/joueps.56.1
https://doi.org/10.18999/joueps.56.1d01a46c8-a5e0-4ec2-9a10-11125df440a9
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
56-1.pdf (750.2 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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| 公開日 | 2011-05-06 | |||||
| タイトル | ||||||
| タイトル | Preseismic groundwater gas anomalies at Nagashima spa near Nagoya for the M=5.7 earthquake (Oct. 31, 2000) in southern Mie Prefecture, Japan: An episodic subsurface process related to the 2001 Tokai silent earthquake | |||||
| 言語 | en | |||||
| 著者 |
KAWABE, Iwao
× KAWABE, Iwao× MORl, Yasunori× IT0, Takamori× INUZUKA, Yoshihiro× MIYAKAWA, Kazuya× NAGAMINE, Koichiro× OOIDA, Tooru× FUJII, Naoyuki |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Groundwater gas anomalies were observed at the 1,500 m deep Nagashima spa well near Nagoya for the M=5.7 earthquake (Oct. 31, 2000) in southern Mie Prefecture, Japan. In spite of the very long focal distance of 98 km, H2/Ar, He/Ar, N2/Ar, and CH4/Ar ratios of groundwater gas bubbles significantly changed not only at the time of the shock but also 3 days before it. Water temperature indicated a sharp coseismic increase. The earthquake was a dip-slip reverse event occurred approximately beneath the plate boundary in the eastern part of Kii Peninsula at 44 km depth. The gas anomalies are strikingly different from the previous ones at the same well, which were restricted to those in H2/Ar ratio for nearby events with M=1.6-5.4 within 25 km. The apparently "long-distance" nature of the groundwater gas anomalies may suggest a coherent subsurface deformation over a roughly 100 km x 100 km area. In view of the size and occurrence timing, we speculate that such a subsurface episode may possibly be related to the onset of unsteady crustal displacements of the 2001 Tokai silent earthquake revealed by the nationwide GPS observation system. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | Dept. of Earth and Planetary Sciences, Nagoya University | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| ID登録 | ||||||
| ID登録 | 10.18999/joueps.56.1 | |||||
| ID登録タイプ | JaLC | |||||
| ISSN（print） | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0919-875X | |||||
| 書誌情報 |
en : The Journal of Earth and Planetary Sciences, Nagoya University 巻 56, p. 1-11, 発行日 2009 |
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| 著者版フラグ | ||||||
| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/14730 | |||||
| 識別子タイプ | HDL | |||||
