地震台站地电场异常特性: 以中国航空工业总公司625研究所为例

杜秋姣; 李阶法; 李献瑞; 曾佐勋

doi:10.3799/dqkx.2014.168

地震台站地电场异常特性: 以中国航空工业总公司625研究所为例

doi: 10.3799/dqkx.2014.168

杜秋姣^{1, 2, 3,},
李阶法⁴,
李献瑞^{1, 3},
曾佐勋^{1, 3, ,}

1.
中国地质大学地球科学学院, 湖北武汉 430074
2.
中国地质大学数学与物理学院, 湖北武汉 430074
3.
中国地质大学教育部长江三峡库区地质灾害研究中心, 湖北武汉 430074
4.
中国航空工业总公司625研究所, 北京 100000

基金项目:

国家青年科学基金项目 41404041

中国博士后科学基金 2014M562079

详细信息

作者简介:
杜秋姣(1977-), 副教授, 从事电磁学地震预测研究.E-mail: dqjhhh@163.com

通讯作者:
曾佐勋, E-mail: zuoxun.zeng@126.com

中图分类号: P319
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出版历程
- 收稿日期: 2014-06-20
- 刊出日期: 2014-12-01

Precursory Abnormal Characteristics of Geoelectric Field: A Case Study of Seismostation in 625 Research Institute of Aviation Industry Corporation of China

Du Qiujiao^{1, 2, 3
,},
Li Jiefa⁴,
Li Xianrui^{1, 3},
Zeng Zuoxun^{1, 3
, ,}

1.
School of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China
3.
Three Gorges Research Center for Geo-hazard, Ministry of Education, China University of Geosciences Wuhan 430074, China
4.
625 Research Institute of Aviation Industry Corporation of China, Beijing 100000, China

摘要

摘要: 通过分析中国航空工业总公司625研究所地电场监测站30多年监测的原始资料, 提取了其中8组数据, 包括4组地电场中的长期异常信号和4组对应震级M_s6.0以上的地震震前短临异常信号.发现这些异常信号有以下特征: 地电场中的长期监测图中包括了许多不同大小、距离远近地震的孕震信息, 其中近区大震会主控一条或多条曲线的走势, 远大、近小的地震会造成曲线时上时下的振荡; 从4组地电场短临信号监测图中发现震前地电场异常总体表现为下降(上升)—折返—回跳—发震的模式, 说明地电场异常变化形态具有相似性和重复性, 证明地电场观测确实能监测到震前异常.发现适合该监测站预测发震时间的新方法: 根据折返天数与回跳天数大致相等, 即回跳日期加上折返天数为发震日期, 证明地电场短临预测方法具有一定的实用性.
- 地电场 /
- 异常特征 /
- 短临前兆 /
- 天然地震
Abstract: The geoelectric field data recorded for more than thirty years at seismostation in 625 Research Institute of Aviation Industry Corporation of China were analyzed, and eight sets of data including four sets of long-term abnormal signals and four sets of short-term abnormal signals were extracted. The abnormal short-term signals correspond to four M_s > 6.0 earthquakes. The geoelectric field signals have the following characteristics. (1) The long-term geoelectric field curves include precursory information from many earthquakes with different magnitudes and epicenter distances. The near-field and major earthquakes control the trendy of geoelectric field curves. Meanwhile big far earthquakes and small near earthquakes can cause oscillations up and down. (2) In the four short-term signals, we find that the geoelectric field curves show a common pattern of up(down), return, bound and occuring phases. The geoelectric field abnormal forms have similarity and repeatability. This proves that the geoelectric field observation can monitor the impending earthquake precursor. A new method to predict the occurrence-time is found. Based on the number of return days approximately be equal to the number of bound days, the date of occurrence time is the date of return plus the number of bound days. It pushes further the method of geoelectric field short-term earthquake precursor toward practice.
- geoelectric field /
- abnormal characteristics /
- short-term precursor /
- earthquake

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图 1 1976年全年东西线(黑色实线)和北南线(红色虚线)地电场日均值曲线

Fig. 1. The day even value curves of the geoelectric field for the year 1976

下载: 全尺寸图片幻灯片

图 2 1996年11月~1997年4月北东线(黑色实线)和北西线(红色虚线)地电场日均值曲线

Fig. 2. The day even value curves of the geoelectric field from Nov. of 1996 to Apr. of 1997

下载: 全尺寸图片幻灯片

图 3 1999年4月~1999年10月北西线地电场日均值曲线

Fig. 3. The day even value curves of the geoelectric field from Apr. of 1999 to Oct. of 1999 in NW direction

下载: 全尺寸图片幻灯片

图 4 2000年全年北西线地电场日均值曲线

Fig. 4. The day even value curves of the geoelectric field in NW direction for the year 2000

下载: 全尺寸图片幻灯片

图 5 1976年唐山M_s7.8地震前东西线(黑色实线)和北南线(红色虚线)地电场异常信号

Fig. 5. Abnormal signals of the geoelectric field before the M_s7.8 earthquake in Tangshan in 1976

下载: 全尺寸图片幻灯片

图 6 1998年张北M_s6.3级地震前地电场异常信号

Fig. 6. Abnormal signals of the geoelectric field before the M_s6.3 earthquake in Zhangbei in 1998

下载: 全尺寸图片幻灯片

图 7 2001年青海若羌M_s8.2级地震前北东线(黑色实线)和北西线(红色虚线)地电场异常信号

Fig. 7. Abnormal signals of the geoelectric field before the M_s8.2 earthquake in Ruojiang, Qinghai in 1998

下载: 全尺寸图片幻灯片

图 8 2008年汶川M_s8.2地震前地电场异常信号

Fig. 8. Abnormal signals of the geoelectric field before the M_s8.2 earthquake in Wenchuan in 2008

下载: 全尺寸图片幻灯片

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