震前电离层TEC异常扰动统计分析
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摘要
利用IGS提供的电离层TEC资料,采用滑动平均方法,对2007年以来全球Ms7.0以上地震进行震前电离层TEC异常扰动研究。统计结果显示:94%的地震的孕震区上空出现了明显的电离层TEC异常扰动,扰动有正有负,而且负的异常扰动多发生在震前一周内,正扰动与时间没有明显的函数关系。
It has been proved by a number of researches that the ionospheric anomalous disturbance do appear a few days or hours before earthquake.On the basis of Total Electron Content(TEC) obtained from Internet GPS Service(IGS),by use of the method of moving average,the 50 Ms≥7.0 earthquakes all over the world since January 1,2007 were examined.The statistical results show that,excluding the other possible factors,there were significant ionospheric disturbances including ionospheric anomalous increase and anomalous decrease before the 94% of all the earthquake onset,and the apparent anomalous decrease occurred within 7 days before the earthquake but the anomalous increase is not the function of the time.
It has been proved by a number of researches that the ionospheric anomalous disturbance do appear a few days or hours before earthquake.On the basis of Total Electron Content(TEC) obtained from Internet GPS Service(IGS),by use of the method of moving average,the 50 Ms≥7.0 earthquakes all over the world since January 1,2007 were examined.The statistical results show that,excluding the other possible factors,there were significant ionospheric disturbances including ionospheric anomalous increase and anomalous decrease before the 94% of all the earthquake onset,and the apparent anomalous decrease occurred within 7 days before the earthquake but the anomalous increase is not the function of the time.
引文
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15 Pulinets S A.Ionospheric precursors of earthquakes;recentadvances in theory and practical applications[J].TAO,2004,15(3):413-415.
16 Pulinets S A,et al.Main phenomenological features of iono-spheric precursors of strong earthquakes[J].Journal of At-mospheric and Solar-Terrestrial Physics,2003,65:1 337-1 347.
17 Sorokina V M,Chmyrevb V M and Yaschenko A K.Theo-retical model of DC electric field formation in the iono-sphere stimulated by seismic activity[J].Journal of Atmos-pheric and Solar-Terrestrial Physics,2005,67:1 259-1 268.
2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 toWenchuanMs8.0 earthquake[J].Journal of Geodesy andGeodynamics,2008,(6):16-21)
3 Liu J Y,et al.Pre-earthquake ionospheric anomalies regis-tered by continuous GPS TEC measurements[J].AnnalesGeophysicae,2004,22:1 585-1 593.
4丁鉴海,索玉成,余素荣.地磁场与电离层异常现象及其与地震的关系[J].空间科学学报,2005,25(6):536-542.(Ding Jianhai,Suo Yucheng and Yu Surong.Phenomenaof geomagnetic and ionospheric anomalies and their relationto earthquakes[J].Chin.J.Space Sci.,2005,25(6):536-542)
5张强.地基GPS监测电离层TEC及其与地震活动关系的研究[D].中国地震局地震研究所,2004.(Zhang Qiang.The ionospheric TEC detected by ground-based GPS and therelationship to the earthquake[D].Institute of Seismology,CEA.2004)
6卓裕荣.电离层地震前兆之研究[D].台湾中央大学太空科学研究所,2002.(Chuo Y J.A study of seismo-iono-spheric precursor[D].NCU Institute of Space Science,2002)
7吴云,等.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,etal.Preseismic ionospheric TEC anomaly detected by ground-based GPS[J].Journal of Geodesy and Geodynamics,2005,(2):36-40)
8杨剑,吴云,周义炎.利用GPS无线电掩星数据研究震前电离层异常[J].大地测量与地球动力学,2008,(1):16-22.(Yang Jian,Wu Yun and Zhou Yiyan.Research onseismo-ionospheric anomalies using GPS radio occultationdata[J].Journal of Geodesy and Geodynamics,2008,(2):16-22)
9赵必强,等.震前电离层扰动研究进展及汶川地震前电离层变化[J].科技导报,2008,26(11):30-33.(ZhaoBiqiang,et al.Recent advances on the ionospheric pre-cur-sors of earthquakes and ionospheric variations prior to Wen-chuan earthquake[J].Science and Technology Review,2008,26(11):30-33)
10熊晶,等.汶川地震前电离层NmF2异常扰动[J].大地测量与地球动力学,2008,(6):22-26.(Xiong Jing,etal.Anomalous disturbance of ionospheric NmF2 beforeWenchuan earthquake[J].Journal of Geodesy and Geody-namics,2008,(6):22-26)
11祝芙英,等.震前电离层TEC异常探测方法研究[J].大地测量与地球动力学,2009,(3):50-54.(Zhu Fuying,et al.Study on method of detecting ionospheric TEC anoma-ly before earthquake[J].Journal of Geodesy and Geody-namics,2009,(3):50-54)
12林剑,等.基于地基GPS资料探测汶川地震电离层TEC的异常[J].地球物理学报,2009,52(1):297-300.(LinJian,et al.Wenchuan earthquake ionospheric TEC anomlydetected by GPS[J].Chinese J,Geophys,2009,52(1):297-300)
13杨马陵,等.两次强震前华南地区电离层TEC异常特征研究[J]大地测量与地球动力学,2009,(6):13-17,21.(Yang Maling,et al.Study on abnormal characteristics of i-onosphere TEC above South-China responding to twostrong earthquakes[J].Journal of Geodesy and Geodynam-ics,2009,(6):13-17,21)
14 Liu J Y,et al.Ionospheric foF2 and TEC anomalous daysassociated withM≥5.0 earthquake in Taiwan during 1997-1999[J].Terr.Atmo.Oceanic Sci.,2004b,(15):371-383.
15 Pulinets S A.Ionospheric precursors of earthquakes;recentadvances in theory and practical applications[J].TAO,2004,15(3):413-415.
16 Pulinets S A,et al.Main phenomenological features of iono-spheric precursors of strong earthquakes[J].Journal of At-mospheric and Solar-Terrestrial Physics,2003,65:1 337-1 347.
17 Sorokina V M,Chmyrevb V M and Yaschenko A K.Theo-retical model of DC electric field formation in the iono-sphere stimulated by seismic activity[J].Journal of Atmos-pheric and Solar-Terrestrial Physics,2005,67:1 259-1 268.
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