摘要
应用内蒙古、黑龙江、吉林、辽宁地磁台站总场F北京时21点绝对观测值,研究了其空间相关性在前郭5.8级震群前的变化,结果显示,在地震前地磁总场F空间相关性会出现下降异常变化,根据异常变化,提出判定异常区域方法,提出的判定方法与实际发震区域一致。
By applying the 21h(Beijing Time) absolute observed values of the total field(F) in the geomagnetic observatories of Inner Mongolia, Heilongjiang Province, Jilin Province, and Liaoning Province, we studied the changing of their spatial correlations before the Qian'guo MS 5.8 earthquake swarm, and the result showed that, before the earthquake, the spatial correlations of the geomagnetic total field F would descend anomalously. Based on these anomalies, we give the method for judging the anomalous region, and it has a concordance with the actual seismic region.
引文
[1]丁鉴海,申旭辉,潘威炎,等.地震电磁前兆研究进展[J].电波科学学报,2006,21(5):791-801.
[2]中国科学院地球物理研究所第十研究室一组.地磁场的空间相关性及其在地震预报中的应用[J].地球物理学报,1997,20(3):169-184.
[3]林美,沈斌.地磁场垂直分量相关分析与地震的对应关系[J].地震研究,1997,5(2):212~219.
[4]冯志生,王建宇,梅卫萍,等.江苏地区地磁Z21测值空间相关异常及其标志体系[J].地震地磁观测与研究,2000,21(1):34-49.
[5]冯志生,蒋延林,李杏元,等.苍山5.2级地震的磁异常特征[J].华南地震,1997,17(1):46-49.
[6]丁鉴海,黄雪香,卢振业.地震电磁学[M].北京:地震出版社,1994.
[7]李美,卢军.地震电磁辐射前兆异常特征和异常指标关系研究[J].地震,2008,28(4):112-120.