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Electric Field Variations Related to Seismic Swarms
https://doi.org/10.15083/0000032612
https://doi.org/10.15083/0000032612db1c4678-4c81-4d2d-a733-bc2da04561f6
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ji0763011.pdf (2.7 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-05-30 | |||||
| タイトル | ||||||
| タイトル | Electric Field Variations Related to Seismic Swarms | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | groundwater motion | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | earthquake | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | forecast | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | electric field | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | precursor | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | departmental bulletin paper | |||||
| ID登録 | ||||||
| ID登録 | 10.15083/0000032612 | |||||
| ID登録タイプ | JaLC | |||||
| その他のタイトル | ||||||
| その他のタイトル | 群発地震に伴う電解変動 | |||||
| 著者 |
Fujinawa, Yukio
× Fujinawa, Yukio× Takahashi, Kozo× Matsumoto, Takumi× Iitaka, Hiroshi× Doi, Takuya× Nakayama, Takeshi× Sawada, Toyoaki× Sakai, Hideo |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 126202 | |||||
| 姓名 | 藤縄, 幸雄 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 126203 | |||||
| 姓名 | 高橋, 耕三 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 126204 | |||||
| 姓名 | 松本, 巧己 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 126205 | |||||
| 姓名 | 飯高, 弘 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 126206 | |||||
| 姓名 | 土井, 卓也 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 126207 | |||||
| 姓名 | 中山, 武 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 126208 | |||||
| 姓名 | 澤田, 豊明 | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 126209 | |||||
| 姓名 | 酒井, 英男 | |||||
| 著者所属 | ||||||
| 著者所属 | National Research Institute for Earth Science and Disaster Prevention | |||||
| 著者所属 | ||||||
| 著者所属 | Communications Research Laboratory | |||||
| 著者所属 | ||||||
| 著者所属 | National Institute of Advanced Industrial Science and Technology | |||||
| 著者所属 | ||||||
| 著者所属 | Disaster Prevention Research Institute, Kyoto University | |||||
| 著者所属 | ||||||
| 著者所属 | Toyama University | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We have been observing subsurface electric field variations using specially designed antenna with a long casing pipe in borehole (Ultra-Long-Electrode Measurement : ULEM) at 12 sites in the central part of Japan since 1989. Analyses of electromagnetic field variation data around the times of several seismic activities, particularly during seismic swarms, indicate that the electric field anomalies correlate well with crustal activity around the site. Field changes appeared in the DC, ULF, and ELF/VLF bands ; the ELF/VLF bands did not always correlate with other bands, but were limited to the most active period. Electric signals associated with a seismic swarm are detected locally within 100 km from the network. Detectability is very heterogeneous, and selectivity of signal detection is largely attributed to the degree of hydraulic connectivity between the source generation zone and the site. The anomalies could be observed more clearly using the borehole antenna than by sensors on the ground surface, probably because of the shorter distance to the source zone, as well as the large length for the sensors to respond to field variations in the heterogeneous media. The field change anomalies may be caused by electric-kinetic effects induced by variations of the confined water circulation regime in association with earthquake occurrence. It is probable that pore water pressure changes preceding and during earthquakes can be detected by an electromagnetic field sensor embedded in the deep borehole near the path of water circulation around faults. | |||||
| 書誌情報 |
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo 巻 76, 号 3, p. 391-415, 発行日 2002-02-12 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 00408972 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00162258 | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 日本十進分類法 | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 458 | |||||
| 出版者 | ||||||
| 出版者 | 東京大学地震研究所 | |||||
| 出版者別名 | ||||||
| Earthquake Research Institute, University of Tokyo | ||||||
