1998年初北京地区震磁监测
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摘要
为了加强北京地区地震活动性的监视预报 ,1998年 1～ 2月开展了北京测网与临时台相互配合的地磁加强观测。根据压磁理论与地震感应磁效应 ,应用同步差值、图像演化、快谱幅比等多种方法 ,分析处理了大量地磁资料 ,研究了地磁时空变化 ,探讨了可能存在的震磁前兆信息。结果表明 ,在此期间北京地区地磁变化正常 ,没有震磁前兆的异常信息。由此作出在此期间内北京地区不会发生M≥ 5 0级地震的预测意见。实际震情与此相符 ,对社会安定起到了积极作用。
In order to strengthen monitoring and predicting earthquake activity in Beijing area, geomagnetic strengthening observations coordinated by Beijing network and temporal stations were carried out during January to February in 1998.According to piezomagnetic theory and seismo induced magnetic effect, using various methods of synchronous differential values, pattern evolution and FFT amplitude ratio etc.,a large amount of geomagnetic data were analyzed, geomagnetic spatial and time variation were studied, and seismomagnetic precursory information that possibly existed were investigated.The results show that the geomagnetic variation were normal in Beijing area during this period, there was not any anomalous information of seismomagnetic precursor. Therefore the prediction was presented that no earthquake of M ≥5 0 would occur in Beijing area during this periad.The actual situation of the seismic activity in the area was compliant with this prediction. This had played an active role in public safety in Beijing area.
In order to strengthen monitoring and predicting earthquake activity in Beijing area, geomagnetic strengthening observations coordinated by Beijing network and temporal stations were carried out during January to February in 1998.According to piezomagnetic theory and seismo induced magnetic effect, using various methods of synchronous differential values, pattern evolution and FFT amplitude ratio etc.,a large amount of geomagnetic data were analyzed, geomagnetic spatial and time variation were studied, and seismomagnetic precursory information that possibly existed were investigated.The results show that the geomagnetic variation were normal in Beijing area during this period, there was not any anomalous information of seismomagnetic precursor. Therefore the prediction was presented that no earthquake of M ≥5 0 would occur in Beijing area during this periad.The actual situation of the seismic activity in the area was compliant with this prediction. This had played an active role in public safety in Beijing area.
引文
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[15 ] 詹志佳 ,高金田 ,张洪利 ,等 ,震磁前兆研究 [J].地震研究 ,1996,19( 4 ) :3 40～ 3 45 .
[2 ] 詹志佳 .国际地震电磁学学术讨论会与访日概况 [J].国际地震动态 ,1997,( 6) :16～ 2 0 .
[3 ] ShapiroV ,JohnstonM ,ZlotnickiJ ,etc .IAGA 97AbstractBook [M].1997.10 9～ 112 .
[4 ] JohnstonM ,HayakawaY .Seismo Electromagnetics [C].1998WesternPacificGeophysicsMeeting .July 2 1～ 2 5 ,Taiwan ,China ,1998.
[5 ] 詹志佳 ,高金田 ,张洪利 ,等 .北京地区地磁监测与震磁信号研究 [J].地震地磁观测与研究 ,1998,19(lA) :81～ 86.
[6] 詹志佳 .震磁现象及其物理基础 [A].国家地震局科技监测司编 .地震监测与预报方法清理成果汇编———地磁地电分册 [C].北京 :地震出版社 ,1998.88～ 10 7.
[7] ZhanZhijia .InvestigationsoftectonomagneticphenomenainChina [J].PhysicsoftheEarthandPlanetaryInteriors ,1989,5 7:11～ 12 .
[8 ] 国家地震局编制 .地震地磁野外测量规范 [S].北京 :地震出版社 ,1986.
[9] 詹志佳 ,高金田 ,张洪利 ,等 .北京地磁观测及其预测地震研究 [A].国家地震局地球物理研究所编 .地震预报研究论文集 ( 1995 ) [C].北京 :地震出版社 ,1996. 76～ 82 .
[10 ] 詹志佳 ,姚富鑫 ,JohnstonM ,等 .中美地磁总强度日变化的分析比较 [J].地震学报 ,1992 ,14 ( 1) :83～ 89.
[11] 詹志佳 ,高金田 ,任熙宪 ,等 .地磁总强度短周期变化及其在地震预测研究中的应用 [A].见 :国家地震局地球物理研究所编 .地震预报研究论文集 [C],北京 :地震出版社 ,1992 . 13 3～ 13 6.
[12 ] 祁贵仲 ,候作中 ,范国华 ,等 .地震的感应磁效应 ( 2 ) [J].地球物理学报 ,1981,2 4 :2 96～ 3 0 9.
[13 ] 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研究 [A].国家地震局科技监测司编 .中国地震预报方法研究 [C].北京 :地震出版社 ,1991. 3 2 1～ 3 2 9.
[14 ] ZhijiaZhan ,JintianGao ,hongliZhang ,etc .SeismomagneticsignalsobservedinChina [A].In :HayakawaY (ed .) .Atmo sphericandionosphericelectromagneticphenomenaassociatedwithearthquakes [C].TerraScientificPubllishingCompany (TER RAPUB) ,Tokyo ,Japan ,1999. 10 3～ 114 .
[15 ] 詹志佳 ,高金田 ,张洪利 ,等 ,震磁前兆研究 [J].地震研究 ,1996,19( 4 ) :3 40～ 3 45 .
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