单历元PPP分析日本Mw9.0地震引起的我国东部沿海同震地表形变
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摘要
通过对高频GPS观测数据的单历元PPP进行解算,并对定位结果进行恒星日滤波,详细分析了日本Mw9.0地震引起的我国东部沿海的同震地表形变过程。结果显示,震时我国东部沿海基准站发生了显著的水平方向和垂直方向的瞬时形变,幅度约为10cm,震后没有产生大于1cm的永久性位移,与国内外相关研究结果基本一致,验证了PPP技术用于同震地表形变分析的有效性。
The coseismic displacements of Mw9.0 Tohoku-Oki earthquake was analyzed with some GPS fiducial stations located in China east coasts,which using epoch-by-epoch PPP and sidereal filtering technique.The result shows an apparent displacement along horizontal and vertical directions,whose amplitude is about 10 cm.However,after the earthquake,there is no obvious permanent displacements more than 1 cm,which agrees with the results of the domestic and foreign relevant groups,and proves the effectiveness of PPP technology used for coseismic displacements analysis.
The coseismic displacements of Mw9.0 Tohoku-Oki earthquake was analyzed with some GPS fiducial stations located in China east coasts,which using epoch-by-epoch PPP and sidereal filtering technique.The result shows an apparent displacement along horizontal and vertical directions,whose amplitude is about 10 cm.However,after the earthquake,there is no obvious permanent displacements more than 1 cm,which agrees with the results of the domestic and foreign relevant groups,and proves the effectiveness of PPP technology used for coseismic displacements analysis.
引文
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[13]Agnew D C,Larson K M.Finding the RepeatTimes of the GPS Constellation[J].GPS Solutions,2006,11(1):71-76
[14]Shestakov N V,Takahashi H,Ohzono M,et al.Analysis of the Far-field Crustal DisplacementsCaused by the 2011Great Tohoku Earthquake In-ferred from Continuous GPS Observations[J].Tec-tonophysics,2012,524/525:76-86
[2]Gu G,Wang W.Far-field Crustal Movements Be-fore and After the 2011 Ms 9.0Japan Earthquakefrom GPS Observations[J].Geodesy and Geody-namics,2011,2(3):1-7
[3]杨少敏,聂兆生,贾志革,等.GPS解算的日本Mw9.0级地震的远场同震地表位移[J].武汉大学学报.信息科学版,2011,36(11):1336-1339
[4]Larson K M,Bodin P,Gomberg J.Using 1-HzGPS Data to Measure Deformations Caused by theDenali Fault Earthquake[J].Science,2003,300(5 624):1 421-1 424
[5]Ji C,Larson K M,Tan Y,et al.Slip History of the2003San Simeon Earthquake Constrained by Combi-ning 1-Hz GPS,Strong Motion,and TeleseismicData[J].Geophysical Research Letters,2004,31:L17608
[6]Miyazaki S,Larson K M,Choi K,et al.Modeling theRupture Process of the 2003September 25Tokachi-Oki(Hokkaido)Earthquake Using 1-Hz GPS data[J].Geophysical Research Letters,2004,31:L21603
[7]殷海涛,张培震,甘卫军,等.高频GPS测定的汶川Ms8.0级地震震时近场地表变形过程[J].科学通报,2010,55(26):2 621-2 626
[8]Herring T A,King R,McClusky S C.GAMITReference Manual[M].Boston:Massachusetts In-stitute of Technology,2010
[9]Kouba J,Heroux P.Precise Point PositioningUsing IGS Orbit and Clock Products[J].GPS Solu-tions,2001,5(2):12-28
[10]张小红.动态精密单点定位(PPP)的精度分析[J].全球定位系统,2006(1):7-11
[11]张小红,何锡扬,李星星.TriP软件非差几何法精密定轨精度分析[J].武汉大学学报.信息科学版,2010,35(11):1 327-1 330
[12]Choi K,Bilich A,Larson K M,et al.Modified Si-dereal Filtering:Implications for High-rate GPS Po-sitioning[J].Geophysical Research Letters,2004,31:L22608
[13]Agnew D C,Larson K M.Finding the RepeatTimes of the GPS Constellation[J].GPS Solutions,2006,11(1):71-76
[14]Shestakov N V,Takahashi H,Ohzono M,et al.Analysis of the Far-field Crustal DisplacementsCaused by the 2011Great Tohoku Earthquake In-ferred from Continuous GPS Observations[J].Tec-tonophysics,2012,524/525:76-86
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