喀什台地磁短周期变化特征与周围地震对应关系
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摘要
在地震孕育过程中 ,由于应力的集中、积累、释放 ,使得应变场内介质磁性发生变化。特别是短周期的地磁异常变化与地震发生前后的地磁扰动密切相关。采用地磁短周期转换函数方法 ,用喀什地磁台 1 990～ 1 998年的地磁观测资料 ,分析计算得出 1 990年以来几次 6级以上强震包括伽师地震前后 ,周期为 9～ 2 0 0分钟的地磁短周期转换函数| A|、| B|、总方差 σz 及帕金森矢量参数、相应的频率响应关系。
During the seismogenic process,because of stress concentration、accumulation and relief,medium magnetism has been changed in the strain field.It is closely relationship between the short period geomagnetic anomalies and disturbance before and after the earthquake.Using the method of geomagnetic short period transfer fundction and the geomagnetic data duing 1990～1998 in Kashi station,the authors have calculated the transfer functions｜A｜、｜B｜and the total variance σ z and Parkinson vector parameters and frequency response since 1990 in the periods of T=9～200min.
During the seismogenic process,because of stress concentration、accumulation and relief,medium magnetism has been changed in the strain field.It is closely relationship between the short period geomagnetic anomalies and disturbance before and after the earthquake.Using the method of geomagnetic short period transfer fundction and the geomagnetic data duing 1990～1998 in Kashi station,the authors have calculated the transfer functions｜A｜、｜B｜and the total variance σ z and Parkinson vector parameters and frequency response since 1990 in the periods of T=9～200min.
引文
[1 ] 中国地震局预测预防司 .地震预报方法实用化研究文集 ,地磁地电专辑 [C].北京 :学术书刊出版社 ,1 990 .2 69～ 2 80
[2 ] 中国地震局预测预防司 .电磁学预报方法 [M].北京 :地震出版社 ,1 998.1 1 0～ 1 1 5
[3] 曾小苹 ,林云芳 ,朱忠杰 ,等 .用地磁转换函数研究震源区介质的电性变化 [J].地震学报 ,1 995,1 7( 3) :335～ 339
[2 ] 中国地震局预测预防司 .电磁学预报方法 [M].北京 :地震出版社 ,1 998.1 1 0～ 1 1 5
[3] 曾小苹 ,林云芳 ,朱忠杰 ,等 .用地磁转换函数研究震源区介质的电性变化 [J].地震学报 ,1 995,1 7( 3) :335～ 339
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