地磁水平场转换函数的短期前兆
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摘要
利用昌黎、白家疃 1 972～ 1 997年的磁变仪资料 ,计算了水平场台际转换函数和单台垂直场转换函数 .通过对转换函数变化全过程的分析 ,注意到仅仅水平场转换函数在唐山地震之前有明显的短期前兆 .这给地震预报提供了一个新的可能捕捉到短期前兆的手段 .
In this paper, using the variometer data of Changli station and Baijiatuan station from 1972 to 1997, the inter station transfer functions of horizontal field and the single station transfer functions of vertical field have been calculated. With analyzing the whole changing process of the transfer functions, we have discovered that only the horizontal field transfer functions arose obvious short term precursors before Tangshan earthquake. This fact may provide a new method for short term prediction of earthquake.
In this paper, using the variometer data of Changli station and Baijiatuan station from 1972 to 1997, the inter station transfer functions of horizontal field and the single station transfer functions of vertical field have been calculated. With analyzing the whole changing process of the transfer functions, we have discovered that only the horizontal field transfer functions arose obvious short term precursors before Tangshan earthquake. This fact may provide a new method for short term prediction of earthquake.
引文
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Beamish P. 1 982 .A geomagnetic precursor to the 1 979Carlisle earthquake[J]. Geophys J R astr Soc,68:53 1～ 543
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Gong Shaojing. 1 985. Anomalous changes in transfer functions and the 1 976Tangshan earthquake( MS=7.8) [J]. JGeomag Geoelec,3 7:50 3～ 50 8
Miyakoshi J. 1 975.Secularvariation of Parkinson vectors in a seismically active region of Middle Asia[J].J Fac GeneralEducation,Tottori Univ,8:2 0 9～ 2 1 8
Rikitake T. 1 979.Changes in the direction of magnetic vector of short-period geomagnetic variations before the1 972Sitka,Alaska earthquake[J].J Geomag Geoelec,3 1 :4 41～ 4 48
Yanagihara K. 1 972 . Secular variation of the electrical conductivity anomaly in the central part of Japan[J]. MemoKakioka Mag Obs,1 1 :1～ 1 1
龚绍京 . 1 987.广东省地磁台的帕金森矢量及广州台的系数在河源地震前后的时间变化 [J].地震研究 ,1 0 ( 5) :575～582
龚绍京 ,王伯维 ,于彬 . 1 989.松潘地震前后地磁转换函数的变化 [A].见 :四川省地震局编 .松潘地震预报学术讨论会文集 [C].北京 :地震出版社 ,95～ 98
龚绍京 ,杨桂君 ,田山 ,等 . 1 991 .菏泽 5.9级地震前后菏泽台转换函数时间变化的研究兼与王同志商榷 [J].地震学报 ,1 3 ( 1 ) :1 1 3～ 1 2 0
龚绍京 ,陈化然 ,张翠芬 ,等 . 1 997.地磁水平场转换函数在唐山地震前的异常反应 [J].地震学报 ,1 9( 1 ) :51～ 58
梅世蓉 . 1 993 .地震科学研究论文选集 [M].北京 :地震出版社 ,1 2 9王雅灵 ,王安滨 ,阎晓梅 ,等 . 1 999.水头梯度变差值演化图象及强地震危险区预测方法研究 [J].华北地震科学 ,1 7( 4 ) :7～ 1 5
Beamish P. 1 982 .A geomagnetic precursor to the 1 979Carlisle earthquake[J]. Geophys J R astr Soc,68:53 1～ 543
Egbert G D,Booker JR. 1 986. Robustestimation of geomagnetic transfer functions[J]. Geophys J R astr Soc,87:1 73～ 1 94
Gong Shaojing. 1 985. Anomalous changes in transfer functions and the 1 976Tangshan earthquake( MS=7.8) [J]. JGeomag Geoelec,3 7:50 3～ 50 8
Miyakoshi J. 1 975.Secularvariation of Parkinson vectors in a seismically active region of Middle Asia[J].J Fac GeneralEducation,Tottori Univ,8:2 0 9～ 2 1 8
Rikitake T. 1 979.Changes in the direction of magnetic vector of short-period geomagnetic variations before the1 972Sitka,Alaska earthquake[J].J Geomag Geoelec,3 1 :4 41～ 4 48
Yanagihara K. 1 972 . Secular variation of the electrical conductivity anomaly in the central part of Japan[J]. MemoKakioka Mag Obs,1 1 :1～ 1 1
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