用GPS观测数据探测日本9.0级地震的电离层异常
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摘要
利用位于日本2011年3月11日9.0级地震区域的三个IGS跟踪站的观测数据,计算得到了地震前后四天的电离层总电子含量(TEC)值。通过分析发现:地震当天出现了明显的电离层TEC扰动异常现象,扰动异常随测站离震源距离的加大而显著减弱;平均电离层TEC在发生地震后的一段时间内显著升高。
By use of the data from three IGS stations located in the area of Mw9.0 Japanese earthquake,the total ionospheric electronic content(TEC) values in four days before and after the earthquake were obtained.There was an explicit ionospheric disturbance phenomenon on that day by analyzing and comparing the computational results.The TEC disturbance phenomenon can be found from different satellite data,which become insignificant with increased distance between the stations and epicenter.A four-day average TEC values before and after the earthquake are computed.The results indicate a significant increase of mean TEC for a few hours after the earthquake.
By use of the data from three IGS stations located in the area of Mw9.0 Japanese earthquake,the total ionospheric electronic content(TEC) values in four days before and after the earthquake were obtained.There was an explicit ionospheric disturbance phenomenon on that day by analyzing and comparing the computational results.The TEC disturbance phenomenon can be found from different satellite data,which become insignificant with increased distance between the stations and epicenter.A four-day average TEC values before and after the earthquake are computed.The results indicate a significant increase of mean TEC for a few hours after the earthquake.
引文
1 Akhoondzadeh M and Saradjian M R.TEC variations analysisconcerning Haiti(January 12,2010)and Samoa(Septem-ber 29,2009)earthquakes[J].Advances in Space Re-search,2011,47:94-104.
2 Karia S P and Pathak K N.Change in refractivity of the at-mosphere and large variation in TEC associated with someearthquakes observed from GPS receiver[J].Advances inSpace Research,2011,47:867-876.
3 Klimenko M V,et al.Formantion mechanism of great positiveTEC disturbances prior to Wenchuan earthquake on May 12,2008[J].Advances in Space Research,2011,48:488-499.
4祝芙英,等.汶川Ms8.0地震前电离层TEC异常分析[J].大地测量与地球动力学,2008,(6):16-21.(ZhuFuying,et al.Study on ionospheric TEC anomaly prior toWenchuan Ms8.0 earthquake[J].Journal of Geodesy andGeodynamics,2008,(6):16-21)
5吴云,乔学军,周义炎.利用地基GPS探测震前电离层TEC异常[J].大地测量与地球动力学,2005,(2):36-40.(Wu Yun,Qiao Xuejun and Zhou Yiyan.Preseismic i-onospheric TEC anomaly detected by ground-based GPS[J].Journal of Geodesy and Geodynamics,2005,(2):36-40)
6 Pulinets S A,et al.Quasielectrostatic model of atmosphere-thermosphere-ionosphere coupling[J].Advance Space Re-search,2000,26(8):1 209-1 218.
7 Eftaxias K J,et al.Experience of short term earthquake pre-cursors with VL F-V HF electron magnetic emissions[J].Natural Hazards and Earth System Sciences,2003,(3):217-228.
8 Afraimovich E L,et al.The shock acoustic waves generatedby earthquake[J].Annales Geophvsicae,2001,19:395-409.
9 Zaslavski Y,Parrot M and Blance E.Analysis of VTECmeasurements above active seismic regions[J].Phys EarthPlanet Int.,1998,105:219-228.
10孟泱,王泽民,鄂栋臣.基于GPS数据的地震前电离层TEC异常研究[J].武汉大学学报(信息科学版),2008,33(1):81-84.(MengYang,Wang Zemin and EDongchen.Ionopsheric TEC anomalies of pre-earthquakebased on GPS data[J].Geomatics and Information Scienceof Wuhan University,2008,33(1):81-84)
11张东和,萧佐.利用GPS计算TEC的方法及其对电离层扰动的观测[J].地球物理学报,2000,43(4):451-458.(Zhang Donghe and Xiao Zuo.A method of calculating TECwith GPS data and its application to the ionospheric disturb-ances[J].Chinese Journal of Geophysics,2000,43(4):451-458)
2 Karia S P and Pathak K N.Change in refractivity of the at-mosphere and large variation in TEC associated with someearthquakes observed from GPS receiver[J].Advances inSpace Research,2011,47:867-876.
3 Klimenko M V,et al.Formantion mechanism of great positiveTEC disturbances prior to Wenchuan earthquake on May 12,2008[J].Advances in Space Research,2011,48:488-499.
4祝芙英,等.汶川Ms8.0地震前电离层TEC异常分析[J].大地测量与地球动力学,2008,(6):16-21.(ZhuFuying,et al.Study on ionospheric TEC anomaly prior toWenchuan Ms8.0 earthquake[J].Journal of Geodesy andGeodynamics,2008,(6):16-21)
5吴云,乔学军,周义炎.利用地基GPS探测震前电离层TEC异常[J].大地测量与地球动力学,2005,(2):36-40.(Wu Yun,Qiao Xuejun and Zhou Yiyan.Preseismic i-onospheric TEC anomaly detected by ground-based GPS[J].Journal of Geodesy and Geodynamics,2005,(2):36-40)
6 Pulinets S A,et al.Quasielectrostatic model of atmosphere-thermosphere-ionosphere coupling[J].Advance Space Re-search,2000,26(8):1 209-1 218.
7 Eftaxias K J,et al.Experience of short term earthquake pre-cursors with VL F-V HF electron magnetic emissions[J].Natural Hazards and Earth System Sciences,2003,(3):217-228.
8 Afraimovich E L,et al.The shock acoustic waves generatedby earthquake[J].Annales Geophvsicae,2001,19:395-409.
9 Zaslavski Y,Parrot M and Blance E.Analysis of VTECmeasurements above active seismic regions[J].Phys EarthPlanet Int.,1998,105:219-228.
10孟泱,王泽民,鄂栋臣.基于GPS数据的地震前电离层TEC异常研究[J].武汉大学学报(信息科学版),2008,33(1):81-84.(MengYang,Wang Zemin and EDongchen.Ionopsheric TEC anomalies of pre-earthquakebased on GPS data[J].Geomatics and Information Scienceof Wuhan University,2008,33(1):81-84)
11张东和,萧佐.利用GPS计算TEC的方法及其对电离层扰动的观测[J].地球物理学报,2000,43(4):451-458.(Zhang Donghe and Xiao Zuo.A method of calculating TECwith GPS data and its application to the ionospheric disturb-ances[J].Chinese Journal of Geophysics,2000,43(4):451-458)
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