地震台站地电场异常特性:以中国航空工业总公司625研究所为例
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摘要
通过分析中国航空工业总公司625研究所地电场监测站30多年监测的原始资料,提取了其中8组数据,包括4组地电场中的长期异常信号和4组对应震级Ms6.0以上的地震震前短临异常信号.发现这些异常信号有以下特征:地电场中的长期监测图中包括了许多不同大小、距离远近地震的孕震信息,其中近区大震会主控一条或多条曲线的走势,远大、近小的地震会造成曲线时上时下的振荡;从4组地电场短临信号监测图中发现震前地电场异常总体表现为下降(上升)—折返—回跳—发震的模式,说明地电场异常变化形态具有相似性和重复性,证明地电场观测确实能监测到震前异常.发现适合该监测站预测发震时间的新方法:根据折返天数与回跳天数大致相等,即回跳日期加上折返天数为发震日期,证明地电场短临预测方法具有一定的实用性.
The geoelectric field data recorded for more than thirty years at seismostation in 625 Research Institute of Aviation Industry Corporation of China were analyzed,and eight sets of data including four sets of long-term abnormal signals and four sets of short-term abnormal signals were extracted.The abnormal short-term signals correspond to four Ms>6.0earthquakes.The geoelectric field signals have the following characteristics.(1)The long-term geoelectric field curves include precursory information from many earthquakes with different magnitudes and epicenter distances.The near-field and major earthquakes control the trendy of geoelectric field curves.Meanwhile big far earthquakes and small near earthquakes can cause oscillations up and down.(2)In the four short-term signals,we find that the geoelectric field curves show a common pattern of up(down),return,bound and occuring phases.The geoelectric field abnormal forms have similarity and repeatability.This proves that the geoelectric field observation can monitor the impending earthquake precursor.A new method to predict the occurrence-time is found.Based on the number of return days approximately be equal to the number of bound days,the date of occurrence time is the date of return plus the number of bound days.It pushes further the method of geoelectric field short-term earthquake pre-cursor toward practice.
The geoelectric field data recorded for more than thirty years at seismostation in 625 Research Institute of Aviation Industry Corporation of China were analyzed,and eight sets of data including four sets of long-term abnormal signals and four sets of short-term abnormal signals were extracted.The abnormal short-term signals correspond to four Ms>6.0earthquakes.The geoelectric field signals have the following characteristics.(1)The long-term geoelectric field curves include precursory information from many earthquakes with different magnitudes and epicenter distances.The near-field and major earthquakes control the trendy of geoelectric field curves.Meanwhile big far earthquakes and small near earthquakes can cause oscillations up and down.(2)In the four short-term signals,we find that the geoelectric field curves show a common pattern of up(down),return,bound and occuring phases.The geoelectric field abnormal forms have similarity and repeatability.This proves that the geoelectric field observation can monitor the impending earthquake precursor.A new method to predict the occurrence-time is found.Based on the number of return days approximately be equal to the number of bound days,the date of occurrence time is the date of return plus the number of bound days.It pushes further the method of geoelectric field short-term earthquake pre-cursor toward practice.
引文
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Lin,X.D.,Xu,P.,Lu,Y.,et al.,2007.Several Typical Interferences in Geoelectric Observation.North ChinaEarthquake Sciences,25(1):16-22(in Chinese withEnglish abstract).
Mao,T.E.,Xi,J.L.,Wang,Y.Q.,et al.,1999.The VariationCharacteristics of the Telluric Field in the Process ofEarthquake.Chinese Journal of Geophysics,42(4):520-528(in Chinese with English abstract).
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Varotsos,P.,Lazaridou,M.,1991.Latest Aspects of Earthquake Prediction in Greece Based on Seismic ElectricSignals.Tectonophysics,224(1-3):321-347.doi:10.1016/0040-1951(93)90055-O
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Zhao,Y.L.,Li,Z.N.,Qian,F.Y.,et al.,1995.ComprehensiveCriteria for the Transition from the Middle-Term to theShort-Term and Impending Anomalies of GeoelectricPrecursors.Earthquake,15(4):308-314(in Chinesewith English abstract).
郭建芳,李非,张秀霞,等,2010.地电场日变幅与地电爆分析.地震地磁观测与研究,31(3):18-23.
林向东,徐平,鲁跃,等,2007.地电场观测中几种常见干扰.华北地震科学,25(1):16-22.
毛桐恩,席继楼,王燕琼,等,1999.地震过程中的大地电场变化特征.地球物理学报,42(4):520-528.
钱复业,赵玉林,2005.地电场短临预报方法研究.地震,25(2):33-40.
史红军,2009.地电场观测过程中的干扰因素分析.东北地震研究,25(2):51-57.
史红军,杨桐,赵卫星,等,2010.榆树地震台地电场观测数据分析.地震地磁观测与研究,31(3):126-134.
席继楼,赵家骝,王燕琼,等,2002.地电场观测技术研究.地震,22(2):67-73.
赵玉林,李正南,钱复业,等,1995.地电前兆从中期向短临过渡的综合判据.地震,15(4):308-314.
Guo,J.F.,Li,F.,Zhang,X.X.,et al.,2010.The Analysis of theGeoelectricity Daily Amplitude and Electric Storm.Seismological and Geomagnetic Observation and Research,31(3):18-23(in Chinese with English abstract).
Lin,X.D.,Xu,P.,Lu,Y.,et al.,2007.Several Typical Interferences in Geoelectric Observation.North ChinaEarthquake Sciences,25(1):16-22(in Chinese withEnglish abstract).
Mao,T.E.,Xi,J.L.,Wang,Y.Q.,et al.,1999.The VariationCharacteristics of the Telluric Field in the Process ofEarthquake.Chinese Journal of Geophysics,42(4):520-528(in Chinese with English abstract).
Myachkin,V.I.,Sobolev,G.A.,Dolbikina,N.A.,et al.,1972.The Study of Variations in Geophysical Fields near Focal Zones of Kamchatka.Tectonophysics,14(3-4):287-293.doi:10.1016/0040-1951(72)90077-7
Qian,F.Y.,Zhao,Y.L.,2005.Study on Geoelectric FieldMethod for Short-Term and Impending EarthquakePrediction.Earthquake,25(2):33-40(in Chinese withEnglish abstract).
Qian,F.Y.,Zhao,Y.L.,Xu,T.C.,et al.,1990.A Model of Earthquake-Impending Precursor of Geoelectricity Triggered byTidal Forces.Phys.Earth Planet.Inter.,62(3-4):284-297.doi:10.1016/0031-9201(90)90173-U
Shi,H.J.,2009.Analysis on the Interference Factors in Geoelectric Field Observation.Seismological Research ofNortheast China,25(2):51-57(in Chinese with English abstract).
Shi,H.J.,Yang,T.,Zhao,W.X.,et al.,2010.Analysis of Geoelectric Field Data at Yushu Seismic Station.Seismological and Geomagnetic Observation and Research,31(3):126-134(in Chinese with English abstract).
Varotsos,P.,Lazaridou,M.,1991.Latest Aspects of Earthquake Prediction in Greece Based on Seismic ElectricSignals.Tectonophysics,224(1-3):321-347.doi:10.1016/0040-1951(93)90055-O
Xi,J.L.,Zhao,J.L.,Wang,Y.Q.,et al.,2002.Research on Observational Technology of the Geoeletric Field.Earthquake,22(2):67-73(in Chinese with English abstract).
Zhao,Y.L.,Li,Z.N.,Qian,F.Y.,et al.,1995.ComprehensiveCriteria for the Transition from the Middle-Term to theShort-Term and Impending Anomalies of GeoelectricPrecursors.Earthquake,15(4):308-314(in Chinesewith English abstract).
郭建芳,李非,张秀霞,等,2010.地电场日变幅与地电爆分析.地震地磁观测与研究,31(3):18-23.
林向东,徐平,鲁跃,等,2007.地电场观测中几种常见干扰.华北地震科学,25(1):16-22.
毛桐恩,席继楼,王燕琼,等,1999.地震过程中的大地电场变化特征.地球物理学报,42(4):520-528.
钱复业,赵玉林,2005.地电场短临预报方法研究.地震,25(2):33-40.
史红军,2009.地电场观测过程中的干扰因素分析.东北地震研究,25(2):51-57.
史红军,杨桐,赵卫星,等,2010.榆树地震台地电场观测数据分析.地震地磁观测与研究,31(3):126-134.
席继楼,赵家骝,王燕琼,等,2002.地电场观测技术研究.地震,22(2):67-73.
赵玉林,李正南,钱复业,等,1995.地电前兆从中期向短临过渡的综合判据.地震,15(4):308-314.
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