用主成分分析方法综合分析首都圈跨断层形变资料
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摘要
基于主成分分析方法,对大同6.1、张北6.2和文安5.1级地震前后首都圈地区的跨断层形变资料进行了综合分析,计算了断层垂直形变速率及其各个主成分和能够反映断层总体活动水平的综合指标W。结果表明,主成分分析方法能够最大限度地保留原始信息,去除相关干扰信息,有助于对前兆资料的分析研究;综合指标W可以较好地反映前兆资料的异常变化,能够代表一个地区前兆观测资料的总体映震水平;首都圈跨断层流动形变资料对大同6.1、张北6.2、文安5.1级地震都有较好的映震能力,从中可以捕捉到中强地震孕育、发展、发生过程中的前兆异常信息。
Based on principal component analysis method,we analyze comprehensively fault-crossing data before and after the Datong earthquake MS6.1,the Zhangbei earthquake Ms6.2 and the Wen'an earthquake Ms5.1 in the capital region of China,calculated the fault vertical deformation rate,all principal components and the composite indicator W of fault vertical deformation rate that could reflect the overall level of all faults activity.The results indicates that principal component analysis method could capture most of original information and remove the interference information.It is helpful for us to analyze precursor information.Comprehensive index W can reflect the abnormal changes of the precursor data well,and can also reflect the overall level of earthquake-reflecting of a regional precursor observations.Cross-fault flow deformation data in the capital region of China have strong earthquake-reflecting ability on the Datong earthquake MS6.1,the Zhangbei earthquake MS6.2 and the Wen'an earthquake MS5.1,and can better capture the precursory anomalies information of strong earthquake preparation,development and occurrence.
Based on principal component analysis method,we analyze comprehensively fault-crossing data before and after the Datong earthquake MS6.1,the Zhangbei earthquake Ms6.2 and the Wen'an earthquake Ms5.1 in the capital region of China,calculated the fault vertical deformation rate,all principal components and the composite indicator W of fault vertical deformation rate that could reflect the overall level of all faults activity.The results indicates that principal component analysis method could capture most of original information and remove the interference information.It is helpful for us to analyze precursor information.Comprehensive index W can reflect the abnormal changes of the precursor data well,and can also reflect the overall level of earthquake-reflecting of a regional precursor observations.Cross-fault flow deformation data in the capital region of China have strong earthquake-reflecting ability on the Datong earthquake MS6.1,the Zhangbei earthquake MS6.2 and the Wen'an earthquake MS5.1,and can better capture the precursory anomalies information of strong earthquake preparation,development and occurrence.
引文
韩鹏、黄清华、修济刚,2009,地磁日变与地震活动关系的主成分分析——以日本岩手县北部6.1级地震为例,地球物理学报,52(6),1556～1563。
楼关寿、周伟、金鹏等,2010,跨断层形变观测干扰因素的调查,大地测量与地球动力学,30(增刊),68～74。
李卫东,2008,应用多元统计分析,1～45,北京:北京大学出版社。
刘小菁、刘序俨、韦永祥等,2008,采用主成分分析方法研究降水对地下水位的影响,地震,28(4),91～102。
王炜、马钦忠、林命週等,2005,主成分分析及地震活动参数的约简,地震学报,27(5),524～531。
中国地震局监测预报司,2007,地震监测预报40年,1～60,北京:地震出版社。
庄世坚、高诚铁、欧寿铭等,1990,用主成分子集合选择法优选大气环境测点,中国环境科学,10(2),148～151。
Shinji N,Hiroshi Y et al,2003,A study on precursor signal extraction with PCA for predicting significant earthquakes,IEICETransactions on Fundamentals of Electronics,Communications and Computer Sciences,E86A(8),2047～2052.
Srivastava H N,Bhattacharya S N,1998,Application of principal component analysis to some earthquake related data in the Koynaregion,India,Engineering Geology,50(1),141～151.
楼关寿、周伟、金鹏等,2010,跨断层形变观测干扰因素的调查,大地测量与地球动力学,30(增刊),68～74。
李卫东,2008,应用多元统计分析,1～45,北京:北京大学出版社。
刘小菁、刘序俨、韦永祥等,2008,采用主成分分析方法研究降水对地下水位的影响,地震,28(4),91～102。
王炜、马钦忠、林命週等,2005,主成分分析及地震活动参数的约简,地震学报,27(5),524～531。
中国地震局监测预报司,2007,地震监测预报40年,1～60,北京:地震出版社。
庄世坚、高诚铁、欧寿铭等,1990,用主成分子集合选择法优选大气环境测点,中国环境科学,10(2),148～151。
Shinji N,Hiroshi Y et al,2003,A study on precursor signal extraction with PCA for predicting significant earthquakes,IEICETransactions on Fundamentals of Electronics,Communications and Computer Sciences,E86A(8),2047～2052.
Srivastava H N,Bhattacharya S N,1998,Application of principal component analysis to some earthquake related data in the Koynaregion,India,Engineering Geology,50(1),141～151.
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