摘要
传统基于小波变换的地震磁效应分析方法,没有考虑空间上的相关性,分析结果误差较大。提出新的地磁空间地震磁效应分析方法,采用小波变换分析法获取地震磁效应波动的时间信息。时间序列随机时刻的频率以及频率波动特性,采用地震磁效应波动的空间线性相关性分析方法,对基本背景场中时间序列随机时刻频率的波动产生的影响进行彻底清除,使地震磁效应波动的异常状态与地震的关系更加突出,实现地震磁效应波动的空间线性相关性分析。结果表明:以泾县及周边地域地震为例,所提方法具有较低的地磁空间地震磁效应分析误差,其稳定性以及信息含量评分是95.7分和96.4分,具有较高的分析性能。
The traditional seismic magnetic effect analysis method based on wavelet transform does not consider the spatial correlation, and the error of the analysis results is large. A new method of seismic magnetic effect analysis in geomagnetic space is proposed. Wavelet transform analysis is used to obtain time information of seismic magnetic effect fluctuations: frequency and frequency fluctuation characteristics of random moments in time series, and spatial linear correlation analysis method of seismic magnetic effect fluctuations is used. The influence of random time frequency fluctuations in time series in the basic background field is completely eliminated, so that the abnormal state of seismic magnetic effect fluctuations is more prominent in the relationship with earthquakes, and the spatial linear correlation analysis of seismic magnetic effect fluctuations is realized. The experimental results show that the proposed method has a low magnetic effect analysis error, and its stability and information content score are 95.7 points and 96.4 points, which has high analytical performance.
作者
严吉
樊冬
程文坤
李章
YAN Ji;FAN Dong;CHENG Wenkun;LI Zhang(Jingxian County Seismological Station,Anhui 241000,China;Huaibei Seismological Station,Huaibei 235000,China)
出处
《华南地震》
2018年第4期61-66,共6页
South China Journal of Seismology
关键词
泾县
地磁空间
地震磁效应
小波变换
线性相关性
预警
Jing county
Geomagnetic space
Seismic magnetic effect
Wavelet transform
Linear correlation
early warning
