地磁Z分量幅相法临震标志体系
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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 ML 5 .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。
By using the daily variation data of geomagnetic Z component for seven years at Lianyungang station and Liyang station, and the earthquakes with M L >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.
By using the daily variation data of geomagnetic Z component for seven years at Lianyungang station and Liyang station, and the earthquakes with M L >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.
引文
1 丁鉴海,卢振业,黄雪香.地震地磁学.北京:地震出版社,1994.233～237.
2 冯志生,姜慧兰,蒋延林.地磁幅相法中的年变消除及在常熟MS5.1地震前兆分析中的应用.地震学刊,1996,(1):53～57.
3 许绍燮.地震预报能力评分.见:许绍燮,陆远忠,朱传镇,等编.地震预报方法实用化研究文集,地震学专辑.北京:学术书刊出版社,1990.586～590
2 冯志生,姜慧兰,蒋延林.地磁幅相法中的年变消除及在常熟MS5.1地震前兆分析中的应用.地震学刊,1996,(1):53～57.
3 许绍燮.地震预报能力评分.见:许绍燮,陆远忠,朱传镇,等编.地震预报方法实用化研究文集,地震学专辑.北京:学术书刊出版社,1990.586～590
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