昆仑山口西8.1级地震前电离层与磁场短期异常对比研究
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摘要
利用中国电离层台站和地磁台网资料,总结了8.1级地震前出现的电离层f0F2(F2层临界频率)异常以及地磁低点位移、地磁日变化异常现象。对比研究了电离层与磁场短期异常分布及特征,结果显示:磁场与电离层时空异常特征有较好的一致性。2001年10月8日出现低点位移,其突变分界线通过震中地区;震前1.5个月之内震中及周围地区出现地磁日变化异常,拉萨台电离层f0F2出现明显异常。
On the basis of data observed by the ionospheric observatories and geomagnetic network in China, the ionospheric f_oF_2 (critical frequency of F_2-layer) anomaly phenomena, geomagnetic low-point displacement and diurnal-variation anomalies of geomagnetic field before Kunlunshan M_S8.1 earthquake have been summarized. Anomaly distribution and characteristics of ionospheric f_oF_2 and geomagnetic variation field have been comparatively studied. The result shows that the temporal-spatial characteristics of short-imminent anomalies of ionosphere and geomagnetic field are consistent. The geomagnetic low-point displacement appeared on Oct. 8, 2001, the boundary of sudden change passed through the epicentral area. The obvious anomalies of diurnal-variation of geomagnetic field near epicentral area and ionospheric f_oF_2 at Lasa observation station are found within one month and half before Kunlunshan earthquake.
On the basis of data observed by the ionospheric observatories and geomagnetic network in China, the ionospheric f_oF_2 (critical frequency of F_2-layer) anomaly phenomena, geomagnetic low-point displacement and diurnal-variation anomalies of geomagnetic field before Kunlunshan M_S8.1 earthquake have been summarized. Anomaly distribution and characteristics of ionospheric f_oF_2 and geomagnetic variation field have been comparatively studied. The result shows that the temporal-spatial characteristics of short-imminent anomalies of ionosphere and geomagnetic field are consistent. The geomagnetic low-point displacement appeared on Oct. 8, 2001, the boundary of sudden change passed through the epicentral area. The obvious anomalies of diurnal-variation of geomagnetic field near epicentral area and ionospheric f_oF_2 at Lasa observation station are found within one month and half before Kunlunshan earthquake.
引文
[1] 熊皓.无线电波传播[M].北京:电子工业出版社,2000.65 102.
[2] 索玉成.f0F2的季节变化特征[J].电波科学学报,1995,10(4):83 93.
[3] 丁鉴海,黄雪香,邢如英,等.地磁"低点位移"现象及其与地震的关系[J].地震学报,1988,10(4):406 414.
[4] 丁鉴海,卢振业,黄雪香.地震地磁学[M].北京:地震出版社,1994.253 267.
[5] 丁鉴海,余素荣,肖武军.地震前兆与短临预报探索[J].地震,2003.23(3):43 50.
[6] 丁鉴海,余素荣,肖武军.地磁低点位移现象与昆仑山口西8.1级地震[J].西北地震学报,2003,25(1):16 21.
[7] KlobucharJA,FougerePF,HendrichsonDH.Alarge amplitudetravelingionosphericdisturbanceproducedbytheMay181980,ExplosionofmountstHelens[J].JGeophysRes,1982,87(A8):62916301.
[8] PulinetSA,Legen′kaAD,KarpachevA.Tletalonthepossibilityoftheearthquakepredictiononthebasisofthetopsidesatellitesounding[J].IZMIRAN,1991,34a(981):25.
[9] KikuchiH.Meteorologico electricphenomenaandelectrohydrodynamics(EHD)orelectromagnetohydrodynamics(EMHD)[A].inEnvironmentalandSpaceElectromagnetics[C].KikuchiedH.Springer Verlag,Tokyo,1991.
[10] PulinetsSA,Seismicactivityasasourceofionosphericvariability[J].advSpaceRes,1998,22:903906.
[2] 索玉成.f0F2的季节变化特征[J].电波科学学报,1995,10(4):83 93.
[3] 丁鉴海,黄雪香,邢如英,等.地磁"低点位移"现象及其与地震的关系[J].地震学报,1988,10(4):406 414.
[4] 丁鉴海,卢振业,黄雪香.地震地磁学[M].北京:地震出版社,1994.253 267.
[5] 丁鉴海,余素荣,肖武军.地震前兆与短临预报探索[J].地震,2003.23(3):43 50.
[6] 丁鉴海,余素荣,肖武军.地磁低点位移现象与昆仑山口西8.1级地震[J].西北地震学报,2003,25(1):16 21.
[7] KlobucharJA,FougerePF,HendrichsonDH.Alarge amplitudetravelingionosphericdisturbanceproducedbytheMay181980,ExplosionofmountstHelens[J].JGeophysRes,1982,87(A8):62916301.
[8] PulinetSA,Legen′kaAD,KarpachevA.Tletalonthepossibilityoftheearthquakepredictiononthebasisofthetopsidesatellitesounding[J].IZMIRAN,1991,34a(981):25.
[9] KikuchiH.Meteorologico electricphenomenaandelectrohydrodynamics(EHD)orelectromagnetohydrodynamics(EMHD)[A].inEnvironmentalandSpaceElectromagnetics[C].KikuchiedH.Springer Verlag,Tokyo,1991.
[10] PulinetsSA,Seismicactivityasasourceofionosphericvariability[J].advSpaceRes,1998,22:903906.
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