江苏地区地磁变化和三个5级以上的地震磁效应
GEOMAGNETIC FIELD VARIATIONS AND THE GEOMAGNE- TIC EFFECT OF THREE M-OVER-5 EARTHQUAKES (Ms>5.0) IN JIANGSU PROVINCE
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摘要: 自1979年以来,江苏地区地磁总强度和垂直分量台网已进行了十年的观测和试验.在上述时间内共获得三个5级以上的地震磁效应.十年观测结果表明,本区在没有发生5级以上地震的期间,地磁垂直分量也未出现过异常变化.本文认为,在中低纬度地区,用较密集的连续观测垂直分量台网来捕捉地震磁异常,有可能改善地磁方法预报5级以上地震的效果和作用.Abstract: Since 1979 repealed observations and experiments of geomagnetic total intensity and its vertical component have been carried out for ten years at the geomagnetic network which is located over Jiangsu Province. In this period the geomagnetic effects of three earthquakes were observeted. The observation results show that no anomalies of the vertical component of geomagnetism have been observed as long as earthquake of Ms>5.0 have not occurred.In this paper, it is suggested that a dense network for continuous observation of the vartical component of geomagnetism may catch geomagnetic anomalies associated with earthquakes of M>5, and this may improve effectiveness of earthquake prediction by geomagnetic observation at mid-or-low latitudes locations.
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[2] Stacey, F, D., 19f,4, Seismo——Geomagnetic Effect, Pure Appl. Geophy., 58,5——22.
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[4] 贺楚如、彭纯一、张四维、张治天、徐国铭、过娟秀,1983傈阳六级地震磁异常与断层面的破裂特征.地震地质,5,2,52——58,
[5] 彭纯一、徐国铭 1986,黄海6.2级地震磁效应.地震学报,8,310——316,
[6] 郝锦绮 1985,唐山地震与震磁效应的最佳观测.地震学报,7,300——310.[1] 章公亮,1988地磁观测、震磁现象与地震预报,地震监测与预报方法清理成果汇编,国家地震局科技监测司,地磁地电分册,3——8.地震出版社,北京.
[2] Stacey, F, D., 19f,4, Seismo——Geomagnetic Effect, Pure Appl. Geophy., 58,5——22.
[3] 彭纯一、筛国铭 1985.江苏地区地磁FEZ观测台,的试验与研究.地震地磁观测与研究,6,3,29——36,
[4] 贺楚如、彭纯一、张四维、张治天、徐国铭、过娟秀,1983傈阳六级地震磁异常与断层面的破裂特征.地震地质,5,2,52——58,
[5] 彭纯一、徐国铭 1986,黄海6.2级地震磁效应.地震学报,8,310——316,
[6] 郝锦绮 1985,唐山地震与震磁效应的最佳观测.地震学报,7,300——310.
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