北京地区地磁变化与震磁前兆研究
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摘要
1986～1994年北京地区地磁资料的分析结果显示，此期间的地磁总强度变化呈上升趋势，其上升幅度约为125nT。各临时台的地磁变化及其频谱有着良好的一致性。在地磁正常变化的背景下研究了震磁前兆信息，获得了发生在北京及其附近地区几个地震的震磁前兆信息。根据地磁前兆异常信息，较好地预报了1993年11月18日ML4．5宝坻地震。观测研究结果表明，地磁方法在地震预测研究中具有积极作用与良好前景，但目前尚处于积累资料与试验阶段，今后须要加强观测研究。
The analytical results of geomagnetic data in Beijing area during 1986～1994 showthat the variations of total geomagnetic intensity appear increasing tendency during thisperiod, and the increasing amplitude is about 125 nT. The geomagnetic changes and theirfrequency spectra at various temporary stations show a good consistency. Under the background of geomagnetic normal changes, the seismomagnetic precursor information hasbeen studied. The seismomagnetic precursor information is obtained from several earthquakes occurred in Beijing and its surrounding area. On the basis of the anomalous information of geomagnetic precursor, the Baodi earthquake with ML 4. 5 on November 18,1993 is well predicted. The investigation results show that the geomagnetic method has active effect and good prospect in earthquake prediction study. However, it is still in thestage for data accumulation and test. It is necessary to strengthen the observation and research in the future.
The analytical results of geomagnetic data in Beijing area during 1986～1994 showthat the variations of total geomagnetic intensity appear increasing tendency during thisperiod, and the increasing amplitude is about 125 nT. The geomagnetic changes and theirfrequency spectra at various temporary stations show a good consistency. Under the background of geomagnetic normal changes, the seismomagnetic precursor information hasbeen studied. The seismomagnetic precursor information is obtained from several earthquakes occurred in Beijing and its surrounding area. On the basis of the anomalous information of geomagnetic precursor, the Baodi earthquake with ML 4. 5 on November 18,1993 is well predicted. The investigation results show that the geomagnetic method has active effect and good prospect in earthquake prediction study. However, it is still in thestage for data accumulation and test. It is necessary to strengthen the observation and research in the future.
引文
1 Zhan Zhijia.Tectonomagnetie observations and earthguake prediction research by geomagnetic ap-proach.Technical Report of Magnetic Observatory, 1992,32(2):318～331.
2 詹志佳,高金田,张洪利,等.北京地磁观测及其预测地震研究.见:国家地震局地球物理研究所编.地震预报研究论文集(1995).北京:地震出版社,1996.76～82.
3 詹志佳,姚富鑫,Johnston M,等.中美地磁总强度日变化分析比较.地震学报,1992,14(1):83～89.
4 詹志佳,高金田,张洪利,等.北京地区的地磁观测及其地震预报研究探索.见:国家地震局地球物理研究所编,地震预报研究论文集(1993).北京:地震出版社,1993.39～45.
5 詹志佳,马森林,彭纯一,等.地磁趋势变化异常前兆与地震预报方法的研究.见:国家地震局科技监测司编.中国地震预报方法研究.北京:地震出版社,1991,321～329。
6 Shapiro V,Abdullabekov K.Anomalous variations of the geomagnetic field in east fergake—magneticprecursor of the alay earthguake with M=7.0(1978,Novemher 2).Geophys J R, Astron Soc,1982,68(1):1～5
7 Sasai Y,Ishikawa Y.Tectonomagnetic signals related to the seismo-volcanic activity in the Izu Penisu-la.J Phys Earth,1991,39(2):299～319.
8 Johnston M,Mueller R,Sasai Y.Magnetic field observations in the near-fleld the 28 June 1992 M7.3Landers .Califormia earthguake Bull Seismol Soc Amer,1994,84(3):792～798.
9 詹志佳,高金田.关于构造磁学研究.见:中国科学院地球物理研究所编.地磁、大气、空间研究及应用.北京:地震出版社,1996.116～124.
2 詹志佳,高金田,张洪利,等.北京地磁观测及其预测地震研究.见:国家地震局地球物理研究所编.地震预报研究论文集(1995).北京:地震出版社,1996.76～82.
3 詹志佳,姚富鑫,Johnston M,等.中美地磁总强度日变化分析比较.地震学报,1992,14(1):83～89.
4 詹志佳,高金田,张洪利,等.北京地区的地磁观测及其地震预报研究探索.见:国家地震局地球物理研究所编,地震预报研究论文集(1993).北京:地震出版社,1993.39～45.
5 詹志佳,马森林,彭纯一,等.地磁趋势变化异常前兆与地震预报方法的研究.见:国家地震局科技监测司编.中国地震预报方法研究.北京:地震出版社,1991,321～329。
6 Shapiro V,Abdullabekov K.Anomalous variations of the geomagnetic field in east fergake—magneticprecursor of the alay earthguake with M=7.0(1978,Novemher 2).Geophys J R, Astron Soc,1982,68(1):1～5
7 Sasai Y,Ishikawa Y.Tectonomagnetic signals related to the seismo-volcanic activity in the Izu Penisu-la.J Phys Earth,1991,39(2):299～319.
8 Johnston M,Mueller R,Sasai Y.Magnetic field observations in the near-fleld the 28 June 1992 M7.3Landers .Califormia earthguake Bull Seismol Soc Amer,1994,84(3):792～798.
9 詹志佳,高金田.关于构造磁学研究.见:中国科学院地球物理研究所编.地磁、大气、空间研究及应用.北京:地震出版社,1996.116～124.
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