| Recognize seismic anomaly of telluric field by data projection vertical to the polarization |
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| 作者姓名： | 阮爱国 赵和云 |
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| 作者单位： | Lanzhou Institute of Seismology China Seismological Bureau，Lanzhou 730000，China |
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| 基金项目： | 甘肃省自然科学基金;ZS991-A25-013; |
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| 摘 要： | IntroductionThe telluric field observation and study in ewthquake prediction are re-developed since lastdecade mainly due to following three reasons: @ Greek scientists claimed they have predictedvarious earthquakes with high successful rate by VAN approach in their ten years of observationsand researches, which has attracted attentions from various aspects in the world; @ The debate onVAN (Ruan, 1998; Uyeda, 1995) approach arid mechanism pllts forward many urgellt researchprojects which in…
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| 关 键 词： | telluric field anomaly polarization projection |
| 收稿时间： | 21 December 1998 |
| 修稿时间： | 1 February 2000 |
Recognize seismic anomaly of telluric field by data projection vertical to the polarization |
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| AI-GUO RUAN,HE-YUN ZHAO.Recognize seismic anomaly of telluric field by data projection vertical to the polarization[J].Acta Seismologica Sinica(English Edition),2000,13(2):189-194. |
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| Authors: | AI-GUO RUAN HE-YUN ZHAO |
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| Institution: | Lanzhou Institute of Seismology, China Seismological Bureau, Lanzhou 730000, China |
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| Abstract: | Based on the telluric field data from a Sino-France cooperation station and analysis of the linear characteristic of telluric field polarization, this paper puts forward a new method, called vertical projection to the polarization, to recognize seismic electrical anomaly from observation background. Through careful analysis of polarization variation in different time intervals, it is determined that the best time interval for the regression of polarization is 24 h. Telluric observational data from two earthquakes, one is Yongdeng M_s=5.8 earthquake on July 22, 1995, the other is west Tianzhu M_s=5.4 earthquake on June 1, 1996, are processed by this new method, it is interesting to discover that abnormal electrical signals appeared 28 days and respectively. The limit condition of using this method is discussed finally. |
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| Keywords: | telluric field anomaly polarization projection |
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