黑蒙交界中强地震地磁异常特征分析
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摘要
众所周知,在许多地震前可以观测到局部磁异常。选择位于中国最北部的国家级绝对地磁观测台内蒙古满洲里地磁台和黑龙江德都地磁台2008年的观测数据,采用差值法、响应比、能量比等分析方法,对2008年6月10日内蒙古阿荣旗M 5.2地震和7月7日黑龙江龙江县M 4.6地震前的局部空间磁场异常进行分析,并应用斜率分析和差分分析对差值法异常信息进行提取,发现在内蒙古阿荣旗M 5.2地震和黑龙江龙江县M 4.6地震前各方法均存在明显的异常,这些异常在一定程度上反映了台站周围小范围的震源区介质电性结构的变化。同时针对异常幅度、持续时间与地震强度间的关系进行了浅析。
It is well known that the local magnetic anomaly are observed before many earthquakes. We choose the absolute magnetic observatory data recorded by Manzhouli magnetic observatory in Inner Mongolia and Dedu magnetic observatory in Heilongjiang Province which located in the northern part of China in 2008.The local magnetic anomaly, before the M_s 5.2 Arongqi earthquake in Inner Mongolian on June 10th and the M_s 4.6 Longjiang earthquake in Heilongjiang Province on July 7th, are analyzed by differential method, such as response ratio and energy ratio method.We extract obvious abnormal information which has reflected electric property diversification of seismic source area around the two stations before earthquake by difference analysis and slope analysis method.In the end, we discussed about the relationship between the abnormal amplitude, duration and earthquake strength.
It is well known that the local magnetic anomaly are observed before many earthquakes. We choose the absolute magnetic observatory data recorded by Manzhouli magnetic observatory in Inner Mongolia and Dedu magnetic observatory in Heilongjiang Province which located in the northern part of China in 2008.The local magnetic anomaly, before the M_s 5.2 Arongqi earthquake in Inner Mongolian on June 10th and the M_s 4.6 Longjiang earthquake in Heilongjiang Province on July 7th, are analyzed by differential method, such as response ratio and energy ratio method.We extract obvious abnormal information which has reflected electric property diversification of seismic source area around the two stations before earthquake by difference analysis and slope analysis method.In the end, we discussed about the relationship between the abnormal amplitude, duration and earthquake strength.
引文
丁鉴海,黄雪香,卢振业.地震电磁学[M].北京:地震出版社,1994．
冯德益.地震波速异常[M].北京:地震出版社,1981．
国家地震局预测预防司.电磁学分析预报方法[M].北京:地震出版社,1998:209-215．
郝锦绮,黄平章,周建国.微破裂对岩石剩磁的影响--对地震预报的意义[J].地球物理学报,1993,36(2) :203-211．
黑龙江省地质矿产局.黑龙江省区域地质志[M].北京:地质出版社,1993:509-578．
陆远忠,等.基于GIS的地震分析预报系统[M].成都地图出版社,2002:20-27．
钱书清,等.岩石受压破裂的ULF和LF电磁前兆信号[J].中国地震,2003,19(2) :109-116．
王亶文.加卸载响应比理论在以磁报震中的应用探索[J].地震地磁观测与研究,1995,16(3) :26-30．
尹祥础,尹灿.非线性系统失稳前兆与地震预报[J].中国科学B集,1991,(5) :512-518．
曾小苹,续春荣,赵明,等.地球磁场对太阳风的加载响应与地震[J].地震地磁观测与研究,1996,17(1) :49-53．
朱燕,史勇军,等.地磁加卸载响应比方法应用初探[J].内陆地震,2001,15(3) :232-239．
Molchanov O A,et al.Results of ULF magnetic field measurements near the epicenters of the Spitak(M_S=6． 9) and Loma Pr eta(M_S=7． 1) earthquakes:comparative analysis[J].Geophys Res Lett,1992,19(14) :1495-1498．
冯德益.地震波速异常[M].北京:地震出版社,1981．
国家地震局预测预防司.电磁学分析预报方法[M].北京:地震出版社,1998:209-215．
郝锦绮,黄平章,周建国.微破裂对岩石剩磁的影响--对地震预报的意义[J].地球物理学报,1993,36(2) :203-211．
黑龙江省地质矿产局.黑龙江省区域地质志[M].北京:地质出版社,1993:509-578．
陆远忠,等.基于GIS的地震分析预报系统[M].成都地图出版社,2002:20-27．
钱书清,等.岩石受压破裂的ULF和LF电磁前兆信号[J].中国地震,2003,19(2) :109-116．
王亶文.加卸载响应比理论在以磁报震中的应用探索[J].地震地磁观测与研究,1995,16(3) :26-30．
尹祥础,尹灿.非线性系统失稳前兆与地震预报[J].中国科学B集,1991,(5) :512-518．
曾小苹,续春荣,赵明,等.地球磁场对太阳风的加载响应与地震[J].地震地磁观测与研究,1996,17(1) :49-53．
朱燕,史勇军,等.地磁加卸载响应比方法应用初探[J].内陆地震,2001,15(3) :232-239．
Molchanov O A,et al.Results of ULF magnetic field measurements near the epicenters of the Spitak(M_S=6． 9) and Loma Pr eta(M_S=7． 1) earthquakes:comparative analysis[J].Geophys Res Lett,1992,19(14) :1495-1498．
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