| Theoretical research on geoelectric anomaly caused by streaming potential during earthquake preparation |
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| 作者姓名： | 朱涛 赵和云 |
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| 作者单位： | ZHU Tao1) ZHAO He-yun2) 1) Seismic Data and Information Center，China Seismological Bureau，Beijing 100045，China 2) Lanzhou Institute of Seismology，China Seismological Bureau，Lanzhou 730000，China |
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| 基金项目： | Contribution No. LC2001034, Lanzhou Institute of Seismology, China Seismological Bueau. |
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| 摘 要： | IntroductionAfter scientists at home and abroad have studied for many years, most of them take streaming potential (SP) as the most possible mechanism for the generation of self-potential anomaly during earthquake preparation. SP refers to electric signal, which generates local or regional electric field, produced when a fluid flows in a porous medium, as a sequence of the change of crustal stress or strain. Many facts suggest that SP is the most possible mechanism of generating self-potenti…
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| 收稿时间： | 18 October 2000 |
| 修稿时间： | 28 May 2001 |
Theoretical research on geoelectric anomaly caused by streaming potential during earthquake preparation |
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| ZHU Tao,ZHAO He-yun.Theoretical research on geoelectric anomaly caused by streaming potential during earthquake preparation[J].Acta Seismologica Sinica(English Edition),2001,14(4):425-433. |
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| Authors: | ZHU Tao ZHAO He-yun |
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| Institution: | 1. Seismic Data and Information Center, China Seismological Bureau,
2. Lanzhou Institute of Seismology, China Seismological Bureau, |
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| Abstract: | The surface streaming potential anomalies (SSPA) for a buried symmetrical pressure source in homogeneous and anisotropic layered half space are calculated separately in this paper. The results show that the maximum of SSPA calculated using the two models are reasonable and are about several hundred mV. The range in which SSPA can be detected on the earth(s surface varies with the intensity of medium anisotropy. Anisotropic crack is introduced to calculate the magnitude of SSPA, so theoretically the contradiction between observation data and theoretical results is interpreted more reasonably. |
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| Keywords: | streaming potential geoelectric anomaly anisotropic crack |
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