强震前地磁秒数据异常及其短临预测意义
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摘要
通过分析6个强震震中附近地磁Z分量秒数据的处理结果显示:一些强震在震前反复出现较强的地磁异常现象.此现象在震前百余天至四十余天和临震前出现;地磁场的特大异常持续天数随震级的增大而增大,其异常天数与总体天数的比值随着震级的增大而增大.该特性对于短临地震预报预警及防震减灾具有一定意义.
According to the result of geomagnetic data,great abnormal magnetic phenomenon occurring repeatedly before some significant earthquakes were found.This kind of phenomenon occurs about from over forty to a hundred days before.This preseismic geomagnetic anomaly lasts long as the magnitude increases.The nature of geomagnetic data before earthquakes has something to do with earthquake prediction and may be applied to precaution against earthquake disasters.
According to the result of geomagnetic data,great abnormal magnetic phenomenon occurring repeatedly before some significant earthquakes were found.This kind of phenomenon occurs about from over forty to a hundred days before.This preseismic geomagnetic anomaly lasts long as the magnitude increases.The nature of geomagnetic data before earthquakes has something to do with earthquake prediction and may be applied to precaution against earthquake disasters.
引文
Chen,C.H.,Hsu,H.L.,Wen,S.,et al.,2013.Evaluation ofSeismo-Electric Anomalies Using Magnetic Data in Taiwan.Natural Hazards&Earth System Sciences,(13):597-604.doi:10.5194/nhess-13-597-2013
Fraser-Smith,A.C.,Bernardi,A.,McGill,P.R.,et al.,1995.Low-Frequency Magnetic Field Measurements near theEpicenter of the Ms 7.1Loma Prieta Earthquake.Geophysical Research Letters,17(9):1465-1468.doi:10.1029/GL017i009p01465
Kosuke,H.,2011.Ionospheric Electron Enhancement Preceding the 2011Tohoku-Oki Earthquake.Geophysical Research Letters,38(17).doi:10.1029/2011GL047908
Liu,J.Y.,Chen,Y.I.,Chuo,Y.J.,et al.,2001.Variations ofIonospheric Total Electron Content during the Chi-ChiEarthquake.Geophysical Research Letters,28(7):1383-1386.doi:10.1029/2000GL012511
Liu,J.Y.,Chuo,Y.J.,Shan,S.J.,et al.,2004.Pre-EarthquakeIonospheric Anomalies Registered by Continuous GPSTEC Measurements.Annales Geophysicae,22(5):1585-1593.doi:10.5194/angeo-22-1585-2004
Moore,G.W.,1964.Magnetic Disturbances Preceding the1964Alaska Earthquake.Nature,203(4944):508-509.
Wienert,K.A.,1970.Notes on Geomagnetic Observatory andSurvey Practice.Unesco,Belgium.
Zeng,X.P.,Lin,Y.F.,Zhu,Z.J.,et al.,1995.Study on ElectricVariations of Media in Epicentral Area by GeomagneticTransfer Functions.Acta Seismologica Sinica,8(3):413-418.doi:10.1007/BF02650569
Zeng,X.P.,Zheng J.A.,Wang Z.Y.,et al.,2011.Large Geomagnetic Anomaly of Impending Earthquake Gives aPossibility in Earthquake Early Warning.EngineeringScience,13(4):48-53.
Fraser-Smith,A.C.,Bernardi,A.,McGill,P.R.,et al.,1995.Low-Frequency Magnetic Field Measurements near theEpicenter of the Ms 7.1Loma Prieta Earthquake.Geophysical Research Letters,17(9):1465-1468.doi:10.1029/GL017i009p01465
Kosuke,H.,2011.Ionospheric Electron Enhancement Preceding the 2011Tohoku-Oki Earthquake.Geophysical Research Letters,38(17).doi:10.1029/2011GL047908
Liu,J.Y.,Chen,Y.I.,Chuo,Y.J.,et al.,2001.Variations ofIonospheric Total Electron Content during the Chi-ChiEarthquake.Geophysical Research Letters,28(7):1383-1386.doi:10.1029/2000GL012511
Liu,J.Y.,Chuo,Y.J.,Shan,S.J.,et al.,2004.Pre-EarthquakeIonospheric Anomalies Registered by Continuous GPSTEC Measurements.Annales Geophysicae,22(5):1585-1593.doi:10.5194/angeo-22-1585-2004
Moore,G.W.,1964.Magnetic Disturbances Preceding the1964Alaska Earthquake.Nature,203(4944):508-509.
Wienert,K.A.,1970.Notes on Geomagnetic Observatory andSurvey Practice.Unesco,Belgium.
Zeng,X.P.,Lin,Y.F.,Zhu,Z.J.,et al.,1995.Study on ElectricVariations of Media in Epicentral Area by GeomagneticTransfer Functions.Acta Seismologica Sinica,8(3):413-418.doi:10.1007/BF02650569
Zeng,X.P.,Zheng J.A.,Wang Z.Y.,et al.,2011.Large Geomagnetic Anomaly of Impending Earthquake Gives aPossibility in Earthquake Early Warning.EngineeringScience,13(4):48-53.
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