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地震 ›› 1998, Vol. 18 ›› Issue (2): 206-210.

• • 上一篇    

地磁Z分量幅相法临震标志体系

冯志生1), 王建宇1), 蒋延林2), 庄明龙1), 吴火林3), 李杏元4)   

  1. 1)中国南京 210014 江苏省地震局;
    2)中国江苏 225600 高邮地震台;
    3)中国南京 210014 南京地震台;
    4)中国江苏 213300 溧阳地震台
  • 收稿日期:1997-06-23 修回日期:1997-09-04 出版日期:1998-04-30 发布日期:2022-05-10
  • 作者简介:冯志生,男,1961年5月出生,副研究员,1987年8月获硕士学位,主要从事数学信号处理震磁关系等研究工作。

THE IMMINENT INDEX OF AMPLITUDE-PHASE METHOD OF GEOMAGNETIC Z COMPONENT

Feng Zhisheng1), Wang Jianyu1), Jiang Yanlin2), Zhuang Minglong1）, Wu Huolin3）, Li Xingyuan4）   

  1. 1) Seismological Bureau of Jiangsu Province, Nanjing 210014, China;
    2) Gaoyou Seismic Station, Jiangsu 225600, China;
    3) Nanjing Seismic Station, Nanjing 210014, China;
    4) Liyang Seismic Station, Jiangsu 213300, China
  • Received:1997-06-23 Revised:1997-09-04 Online:1998-04-30 Published:2022-05-10

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摘要： 应用连云港台和溧阳台7a以上的地磁Z分量日变资料及其间江苏地区ML5.0以上地震,提取了线性去倾及二次去倾消除年变的幅相法临震标志体系。分析认为上述标志体系与原有的方法比较,具有异常判别受人为因素影响小的优点,但须进一步降低虚报率。

关键词: 地磁幅相法, 临震标志, 去倾, 标准值

Abstract: By using the daily variation data of geomagnetic Z component for seven years at Lianyungang station and Liyang station, and the earthquakes with ML > 5.0 in Jiangsu Province, we get the imminent index of amplitude-phase method that eliminated the annual variation with a linear detrending and twice detrending. The analysis shows that the above-mentioned index system has the advantage of less influenced of man made factors on anomaly judgement, compared with the existing method. However it is necessary to decrease the false prediction ratio.

Key words: Geomagnetic amplitude-phase, Imminent index, Detrending, Standard value