宫城Mw9.0级地震前日本IGS站GPS时间序列分析
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摘要
为探讨日本宫城Mw9.0级地震前IGS(国际全球导航卫星服务)站的运动特征,针对日本7个IGS站4年(2007—2011)的观测资料,分别采用多项式拟合、小波降噪的方法分析站点水平方向运动的变化,采用小波分析、三角函数建模的方法分析竖向运动的变化.研究结果表明:宫城地震前6个月,日本境内多个IGS站竖向隆起速率加快,北方向运动速率减慢,东方向存在较陡的跳动现象.
To investigate the movement characteristics of IGS(International GNSS(global navigation satellite system) Service) sites in Japan before Tohoku Mw9.0 earthquake,the observed data obtained by 7 IGS sites located in Japan from January,2007 to March,2011 were utilized.A polynomial fitting method and a wavelet denoising method were employed to analyze the horizontal movement,and the vertical movement was assessed by the wavelet analysis method and the trigonometric function modeling.The result shows that before the Tohoku Mw9.0 earthquake,the up component of ground movement at most of the IGS sites in Japan turns to be fast,the north component becomes slow,while the east component changes irregularly.
To investigate the movement characteristics of IGS(International GNSS(global navigation satellite system) Service) sites in Japan before Tohoku Mw9.0 earthquake,the observed data obtained by 7 IGS sites located in Japan from January,2007 to March,2011 were utilized.A polynomial fitting method and a wavelet denoising method were employed to analyze the horizontal movement,and the vertical movement was assessed by the wavelet analysis method and the trigonometric function modeling.The result shows that before the Tohoku Mw9.0 earthquake,the up component of ground movement at most of the IGS sites in Japan turns to be fast,the north component becomes slow,while the east component changes irregularly.
引文
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[21]MANGIAROTTI S.Annual vertical crustal motionspredicted from surface mass redistribution and observedby space geodesy[J].Journal of GeophysicalResearch,2001,106(3):4277-4291.
[22]王沁.时间序列分析及其应用[M].成都:西南交通大学出版社,2008:137-166.
[23]KIERULF H P,PLAG H P,Bingleu R M,et al.Comparison of GPS analysis strategies for high-accuracy vertical land motion[J].Physics andChemistry of the Earth,2008,33(3/4):194-204.(中、英文编辑:付国彬)
[2]许才军,申文斌,晁定波.地球物理大地测量学与方法[M].武汉:武汉大学出版社,2006:193-212.
[3]周硕愚,吴云,李正媛,等.形变大地测量学的进展、问题与地震预报[J].大地测量与地球动力学,2004,24(4):95-101.ZHOU Shuoyu,WU Yun,LI Zhengyuan,et al.Advances and problems of deformation geodesy andearthquake prediction[J].Journal of Geodesy andGeodynamics,2004,24(4):95-101.
[4]RAYAN A,FERNANDES,R M S,KHALIL H A,etal.Evaluation of the crustal deformations in the northernregion of Lake Nasser(Egypt)derived from 8 years ofGPS campaign observations[J].Journal of Geody-namics,2010(49):201-250.
[5]KASS W G,DULANEY R,GRIFFITHS J,et al.Global GPS data analysis at the National GeodeticSurvey[J].Journal of Geodesy,2009,83(3):289-295.
[6]AZAR M K,GRAFAREND W E.Surface deformationanalysis of dense GPS networks based on intrinsicgeometry:deterministic and stochastic aspects[J].Journal of Geodesy,2009,83(5):431-454.
[7]VOLKER T,PETER S,TONIE V D,et al.Verticaldeformations from homogeneously processed GRACE andglobal GPS long-term series[J].Journal of Geodesy,2011,85(5):291-310.
[8]温扬茂,许才军.联合GPS与重力资料反演分析川滇地区现今地壳形变[J].武汉大学学报:信息科学版,2009,34(5):568-572.WEN Yangmao,XU Caijun.Contemporary crustaldeformation in Sichuan-Yunnan region from GPS andgravity data[J].Geomatics and Information Science ofWuhan University,2009,34(5):568-572.
[9]王阎昭,王恩宁,沈正康,等.基于GPS资料约束反演川滇地区主要断裂现今活动速率[J].中国科学D辑:地球科学,2008,38(5):582-597.WANG Yanzhao,WANG Enning,SHEN Zhengkang,etal.GPS-constrained inversion of present-day slip ratesalong major faults of the Sichuan-Yunnan region,China[J].Science in China Series D:Earth Sciences,2008,38(5):582-597..
[10]申重阳,王琪.川滇菱形块体主要边界运动模型的GPS数据反演分析[J].地球物理学报,2002,45(3):352-361.SHEN Chongyang,WANG Qi.GPS inversion ofkinematic model of the main boundaries of the rhombusblock in Sichuan and Yunnan[J].Chinese Journal ofGeophysics,2002,45(3):352-361.
[11]袁林果,丁晓利,陈武,等.香港GPS基准站坐标序列特征分析[J].地球物理学报,2008,5(5):1372-1384.YUAN Linguo,DING Xiaoli,CHEN Wu,et al.Characteristics of daily position time series from theHong Kong GPS fiducial network[J].Chinese Journalof Geophysics,2008,51(5):1372-1384.
[12]BORGHI A,AOUDIA A,RIVA E M,et al.GPSmonitoring and earthquake prediction:a success storytowards a useful integration[J].Tectonophysics,2009,46(5):177-189.
[13]陈玉东.地球物理信息处理基础[M].北京:地质出版社,2006:1-26.
[14]DONG D,HERRING T A,KING R W.Estimatingregional deformation from a combination of space andterrestrial geodetic data[J].Journal of Geodesy,1998,72(4):200-214.
[15]HERRING T A,KING R W,MCCLUSKY S C.GAMIT reference manual:GPS analysis at MIT(Release 10.4)[R].Cambridge,Massachusetts:Massachusetts Institute of Technology,2010:137-144.
[16]许才军,张曹玉.地壳形变测量与数据处理[M].武汉:武汉大学出版社,2006:59-73.
[17]BOX G E P,JENKINS G M,REINSEL G C.Timeseries analysis:forecasting and control[M].Oakland,California:Princeton University Press,1994:93-100.
[18]王敏,沈正康,董大南.非构造形变对GPS连续站位置时间序列的影响和修正[J].地球物理学报,2005,48(5):1045-1052.WANG Ming,SHEN Zhengkang,DONG Danan.Effects of non-tectonic crustal deformation oncontinuous GPS position time series and correction tothem[J].Chinese Journal of Geophysics,2005,48(5):1045-1052.
[19]秘金钟,李毓麟,张鹏,等.GPS基准站坐标与速度场精度及随时间变化规律的探讨[J].武汉大学学报:信息科学版,2004,29(4):763-782.BEI Jinzhon,LI Yuli,ZHANG Peng,et al.Accuracyof GPS fiducial station coordinate and velocity field andtheir time series[J].Geomatics and InformationScience of Wuhan University,2004,29(4):763-782.
[20]张燕,吴云,施顺英,等.GPS时间序列揭示地震前兆的初步探索[J].大地测量与地球动力学,2005,25(3):96-99.ZHANG Yan,WU Yun,SHI Shunying,et al.Preliminary discussion on GPS time series manifestingearthquake precursor[J].Journal of Geodesy andGeodynamics,2005,25(3):96-99.
[21]MANGIAROTTI S.Annual vertical crustal motionspredicted from surface mass redistribution and observedby space geodesy[J].Journal of GeophysicalResearch,2001,106(3):4277-4291.
[22]王沁.时间序列分析及其应用[M].成都:西南交通大学出版社,2008:137-166.
[23]KIERULF H P,PLAG H P,Bingleu R M,et al.Comparison of GPS analysis strategies for high-accuracy vertical land motion[J].Physics andChemistry of the Earth,2008,33(3/4):194-204.(中、英文编辑:付国彬)
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