基于GPS数据的地震前电离层TEC异常研究
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摘要
选取印度洋区域7个IGS站,运用2004年12月26日印度洋地震前后共计25 d的GPS观测数据,计算出高时空分辨率的VTEC。综合考虑了太阳和地磁活动参数,运用统计分析的方法,详尽阐释了地震发生前TEC减小的电离层异常现象。
Seven IGS stations is selected in the Indian Ocean,using the GPS measurements of total 25 days before and after Indian Ocean earthquake event on 26th December,2004,VTECs are computed with high temporal and spatial resolution,with consideration of the solar and geomagnetic parameter during this time,ionospheric anomalies with phenomenon of VTEC decrease is detailed explained adopting a statistical analysis method.
Seven IGS stations is selected in the Indian Ocean,using the GPS measurements of total 25 days before and after Indian Ocean earthquake event on 26th December,2004,VTECs are computed with high temporal and spatial resolution,with consideration of the solar and geomagnetic parameter during this time,ionospheric anomalies with phenomenon of VTEC decrease is detailed explained adopting a statistical analysis method.
引文
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[6]Plotkin V V.GPS Detection of Ionospheric Pertur-bation Before the 13 February 2001,El-SalvadorEarthquake[J].Natural Hazards and Earth SystemSciences,2003,3:249-253
[7]Liu J Y,Chuo Y J,Shan S J,et al.Pre-earthquakeIonospheric Anomalies Registered by GPS TECMeasurement[J].Annales Geophysicae,2004,22:1 585-1 593
[8]Liu J Y,Chen Y I,Chou Y J,et al.Variation ofIonospheric Total Electron Content During the Chi-Chi Earthquake[J].Geophysical Research Letters,2001,28(7):1 383-1 386
[9]Trigunait A,Parrot M,Pulinets S A,et al.Varia-tion of Ionospheric Electron Density During the BhujSeismic Event[J].Annales Geophysicae,2004,22:4 123-4 131
[10]USGS Earthquake Hazards Program.Magnitude 9.0-Sumatra-Andaman Islands Earthquakeoff theWest Coast of Northern Suimatra 2004 December 2600:58:53 UTC[OL].http://earthquake.usgs.gov/eqinthenews/2004/usslav,2007
[2]Eftaxias K,Kapiris P,Polvniannakis J,et al.Ex-perience of Short Term Earthquake Precursors withVLF-VHF Electron Magnetic Emissions[J].Natu-ral Hazards and Earth System Sciences,2003(3):217-228
[3]Afraimovich E L.Perevalova N P,Plotnikov A V,et al.The Shock Acoustic Waves Generated byEarthquake[J].Annales Geophvsicae,2001,19:395-409
[4]Pulinets S A,Boyarchuk K A,Lomonosov A M,etal.Ionospheric Precursors to Earthquakes:a Pre-liminary Analysis of the foF2 Critical Frequencies atChung-Li Ground-based Station for Vertical Sound-ing Ionosphere(Taiwan island)[J].Geomagnetismand Aeronomy,2002,42(4):508-513
[5]Pulinets S A,Liu Jingyan,Safronova I A.Interpre-tation of a Statistical Analysis of Variations in thefoF2 Critical Frequency Before Earthquakes Basedon Data from Chung-Li Ionospheric Station(Tai-wan)[J].Geomagnetism and Aeronomy,2004,44(1):102-106
[6]Plotkin V V.GPS Detection of Ionospheric Pertur-bation Before the 13 February 2001,El-SalvadorEarthquake[J].Natural Hazards and Earth SystemSciences,2003,3:249-253
[7]Liu J Y,Chuo Y J,Shan S J,et al.Pre-earthquakeIonospheric Anomalies Registered by GPS TECMeasurement[J].Annales Geophysicae,2004,22:1 585-1 593
[8]Liu J Y,Chen Y I,Chou Y J,et al.Variation ofIonospheric Total Electron Content During the Chi-Chi Earthquake[J].Geophysical Research Letters,2001,28(7):1 383-1 386
[9]Trigunait A,Parrot M,Pulinets S A,et al.Varia-tion of Ionospheric Electron Density During the BhujSeismic Event[J].Annales Geophysicae,2004,22:4 123-4 131
[10]USGS Earthquake Hazards Program.Magnitude 9.0-Sumatra-Andaman Islands Earthquakeoff theWest Coast of Northern Suimatra 2004 December 2600:58:53 UTC[OL].http://earthquake.usgs.gov/eqinthenews/2004/usslav,2007
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