玉树Ms7.1地震前电离层VTEC异常
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摘要
利用中国地壳运动观测网络的GNSS连续观测站资料,解算了2010年4月14日玉树Ms7.1地震后,震中附近4个GNSS观测站(LHAS、LUZH、DLHA、WUSH)上空的TEC时间序列数据及中国区TEC二维分布的时间序列数据。从TEC时间序列图来看,其中LHAS、LUZH、WUSH站在4月1日当地时的下午TEC出现了正扰动;LHAS、LUZH和DLHA站在4月5日当地时的午夜TEC出现了正扰动;TEC的扰动自东向西漂移,其中5日的扰动区域相对较大,几乎横跨整个中国区域上空。
Using vertical total electron content(VTEC) derived from the reference stations of Crustal Movement Observational Network of China to examine the ionospheric variations during the Ms7.1 Yushu earthquake occurred on April 14,2010,in China,the time series of TEC values over 4 GNSS stations(LHAS,LUZH,DLHA,WUSH) around the epicenter and the TEC values of 2D distribution over whole China was computed.The final results show that the ionospheric VTEC over 3 GNSS ststions(LHAS,LUZH,WUSH) increased in the afternoon of local time on April 1,and the VTEC values over 3 GNSS stations(LHAS,LUZH,DLHA) also increased in the midnight on April 5,both of these ionospheric anomalies drifted from east to west,and the latter acrossed the whole China.
Using vertical total electron content(VTEC) derived from the reference stations of Crustal Movement Observational Network of China to examine the ionospheric variations during the Ms7.1 Yushu earthquake occurred on April 14,2010,in China,the time series of TEC values over 4 GNSS stations(LHAS,LUZH,DLHA,WUSH) around the epicenter and the TEC values of 2D distribution over whole China was computed.The final results show that the ionospheric VTEC over 3 GNSS ststions(LHAS,LUZH,WUSH) increased in the afternoon of local time on April 1,and the VTEC values over 3 GNSS stations(LHAS,LUZH,DLHA) also increased in the midnight on April 5,both of these ionospheric anomalies drifted from east to west,and the latter acrossed the whole China.
引文
1 Calais E and Minster J.GS detection of ionospheric pertur-bantion following the January 17,1994,Northridge earth-quake[J].Geophysical Research Letters,1995,22(9):1 045-1 048.
2 Zaslavski Y,parrot M and Blanc E.Analysis of TEC meas-urements above active seismic regions[J].Physics of theEarth Planetary Interiors,1998,105:219-228.
3 Liu J Y,et al.Variations of ionospheric total electron contentduring the Chi-Chi earthquake[J].Geophysical ResearchLettres,2001,28(7):1 383-1 386.
4 Liu J Y,et al.Pre-earthquake ionospheric anomalies regis-tered by continuous GNSS TEC measurement[J].AnnalesGeophysicas,2004:1 585-1 593.
5吴云,乔学军,周义炎.利用地基GNSS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 ion-ospheric TEC anomaly detected by ground-based GNSS[J].Journal of Geodesy and Geodynamics,2005,(2):36-40)
6 Liu J L,et al.Seismoionospheric GNSS total electron contentanomalies observed before the 12 May 2008Mw7.9 Wen-chuan earthquake[J].Journal of Geophysical Research,2009,114:A04320.
7 Zhou Yiyan,et al.Ionospheric anomalies detected by ground-based GNSS before theMw7.9 Wenchuan earthquake of May12,2008,China[J].Journal of Atmospheric and Solar-Ter-restrial Physics,2009,71:959-966.
8林剑,等.基于GNSS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.(Lin Jian,etal.Wenchuan earthquake ionosphere TEC anomaly detectedby GNSS[J].Chines J.Geophys,2009,52(1):297-300)
9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)
10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):30-34.(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):30-34)
11周义炎,等.汶川Ms8.0地震前电离层VTEC的异常变化[J].地球物理学报,2010,53(3):556-566.(ZhouYiyan,et al.Anomalous variations of ionospheric VTEC be-foreMs8.0 Wenchuan earthquake[J].Chinese Journal ofGeophysics,2010,53(3):556-566)
12熊年禄,唐存琛,李行健.电离层物理概论[M].武汉:武汉大学出版社,1999.(Xiong Nailu,Tang Cunchen and LiXingjian.Introduction to ionospheric physics[M].Wuhan:Wuhan University Press,1999)
13 Pulinets S A and Boyarchuk K.Ionospheric precursors ofearthquakes[M].Berlin Heidelberg:Sprioger-Verlag,2004.
14 Liu J Y,et al.Pre-earthquake ionospheric anomalies moni-tored by GNSS TEC[J].Annales Geophysicae,2004,22:1 585-1 593.
15 Liu J Y,et al.Astatistical investigation of pre-earthquake i-onospheric anomaly[J].J Geophys.Res.,2006,111:A05304.
2 Zaslavski Y,parrot M and Blanc E.Analysis of TEC meas-urements above active seismic regions[J].Physics of theEarth Planetary Interiors,1998,105:219-228.
3 Liu J Y,et al.Variations of ionospheric total electron contentduring the Chi-Chi earthquake[J].Geophysical ResearchLettres,2001,28(7):1 383-1 386.
4 Liu J Y,et al.Pre-earthquake ionospheric anomalies regis-tered by continuous GNSS TEC measurement[J].AnnalesGeophysicas,2004:1 585-1 593.
5吴云,乔学军,周义炎.利用地基GNSS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 ion-ospheric TEC anomaly detected by ground-based GNSS[J].Journal of Geodesy and Geodynamics,2005,(2):36-40)
6 Liu J L,et al.Seismoionospheric GNSS total electron contentanomalies observed before the 12 May 2008Mw7.9 Wen-chuan earthquake[J].Journal of Geophysical Research,2009,114:A04320.
7 Zhou Yiyan,et al.Ionospheric anomalies detected by ground-based GNSS before theMw7.9 Wenchuan earthquake of May12,2008,China[J].Journal of Atmospheric and Solar-Ter-restrial Physics,2009,71:959-966.
8林剑,等.基于GNSS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.(Lin Jian,etal.Wenchuan earthquake ionosphere TEC anomaly detectedby GNSS[J].Chines J.Geophys,2009,52(1):297-300)
9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)
10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):30-34.(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):30-34)
11周义炎,等.汶川Ms8.0地震前电离层VTEC的异常变化[J].地球物理学报,2010,53(3):556-566.(ZhouYiyan,et al.Anomalous variations of ionospheric VTEC be-foreMs8.0 Wenchuan earthquake[J].Chinese Journal ofGeophysics,2010,53(3):556-566)
12熊年禄,唐存琛,李行健.电离层物理概论[M].武汉:武汉大学出版社,1999.(Xiong Nailu,Tang Cunchen and LiXingjian.Introduction to ionospheric physics[M].Wuhan:Wuhan University Press,1999)
13 Pulinets S A and Boyarchuk K.Ionospheric precursors ofearthquakes[M].Berlin Heidelberg:Sprioger-Verlag,2004.
14 Liu J Y,et al.Pre-earthquake ionospheric anomalies moni-tored by GNSS TEC[J].Annales Geophysicae,2004,22:1 585-1 593.
15 Liu J Y,et al.Astatistical investigation of pre-earthquake i-onospheric anomaly[J].J Geophys.Res.,2006,111:A05304.
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