GPS数据约束的昆仑Ms8.1地震断层的分段模型
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摘要
利用InSAR结果反演得到的多破裂断层模型,用GPS数据为约束,根据点位错理论,运用向前模拟的方法,通过修正部分震源参数,得到了新的昆仑Ms8.1断层模型。由该模型模拟得到的理论同震水平位移无论是在方向还是大小上,较之由以前的多破裂断层模型模拟得到的理论同震水平位移更符合GPS观测结果,整体上也与野外考察结果更接近。在此基础上,还给出了昆仑Ms8.1地震的同震垂直位移及重力变化。
It is founded that there are significant differences in the hypocentral parameters of the Kunlun Ms8.1 earthquake in some present corresponding studies.This work is based on the multi-rupture segment superposition model obtained by the conversion from the InSar data.According to the point dislocation theory,some focal parameters have been reasonably modified by means of the inversion technique of forward simulation in constraint of the GPS measurements,thus a new model of the Kunlun Mountain Ms8.1 earthquake is obtained.As a result,the co-seismic horizontal deformation field,which is in better agreement with the GPS measurements and the field investigation results,has been deduced.Meanwhile,the co-seismic vertical deformation and gravity changes are given.
It is founded that there are significant differences in the hypocentral parameters of the Kunlun Ms8.1 earthquake in some present corresponding studies.This work is based on the multi-rupture segment superposition model obtained by the conversion from the InSar data.According to the point dislocation theory,some focal parameters have been reasonably modified by means of the inversion technique of forward simulation in constraint of the GPS measurements,thus a new model of the Kunlun Mountain Ms8.1 earthquake is obtained.As a result,the co-seismic horizontal deformation field,which is in better agreement with the GPS measurements and the field investigation results,has been deduced.Meanwhile,the co-seismic vertical deformation and gravity changes are given.
引文
1陈杰,等.2001年昆仑山口西8.1级地震地表破裂带[J].第四纪研究,2003,23(6):629-638.1Chen Jie,et al.Surface rupture zones of the2001earth-quakeMs8.1west of Kunlun pass,Northern Qinghai-Tibet plateau[J].Quaternary Sciences,2003,23(6):629-638.(in Chinese)
2单新建,柳稼航,马超.2001年昆仑山口西Ms8.1地震同震形变场特征的初步分析[J].地震学报,2004,26(5):474-480.2Shan Xinjian,Liu Jiahang and Ma Chao.The preliminary a-nalysis on the features of co-seismic deformation of the westof Kunlunshan pass earthquake(Ms8.1)in2001[J].Acta Seismologica Sinica,2004,26(5):474-480.(in Chinese)
3乔学军,等.昆仑山口西Ms8.1地震的地壳形变特征[J].大地测量与地球动力学,2002,22(4):6-11.3Qiao Xuejun,et al.Characteristics of crustal deformation re-lated toMs8.1Kunlunshan earthquake[J].Journal of Ge-odesy and Geodynamics,2002,22(3):6-11.(in Chi-nese)
4张晓亮,等.昆仑山口西Ms8.1地震同震形变场的模拟分析[J].大地测量与地球动力学,2007,27(2):16-21.4Zhang Xiaoliang,et al.Simulation and analysis of coseismic deformation field ofMs8.1earthquake in west to Kunlun mountain pass[J].Journal of Geodesy and Geodynamics,2007,27(2):16-21.(in Chinese)
5张艳梅,等.基于DINSAR的2001年昆仑山口西8.1级大地震形变探测[J].大地测量与地球动力学,2007,27(3):12-17.5Zhang Yanmei,et al.Seismic deformation detection ofMs8.1earthquake in west to Kunlun mountain pass in2001with DInSAR[J].Journal of Geodesy and Geodynamics,2007,27(3)12-17.(in Chinese)
6万永革,等.利用GPS和水准测量资料反演2001年昆仑山口西8.1级地震的同震滑动分布[J].地震地质,2004,26(3):393-404.6Wan Yongge,et al.Co-seismic slip distribution of the2001west of Kunlun mountain pass earthquake inverted by GPS and leveling data[J].Seismology and Geology,2004,26(3):393-404.(in Chinese)
7谭凯,王琪,申重阳.用大地测量数据反演2001年昆仑山地震[J].大地测量与地球动力学,2004,24(3):47-50.7Tan Kai,Wang Qi and Shen Chongyang.Using geodetic da-ta to inverse co-seismic dislocation of2001Kunlun earth-quake[J].Journal of Geodesy and Geodynamics,2004,24(3):47-50.(in Chinese)
8马超,单新建.昆仑山Ms8.1地震震源参数的多破裂段模拟研究[J].地球物理学报,2006,49(2):428-437.8Ma Chao and Shan Xinjian.A multi-segment analytic simu-lation of hypocentral geometric characteristic parameters of theMs8.1earthquake at the Kunlun mountains[J].Chinese Journal of Geophysics,2006,49(2):428-437.(in Chi-nese)
9Wang R F,Lorenzo-Martin and Roth F.PSGRN/PSCMP-a new code for calculating co-and post-seismic deformation,geoid and gravity changes based on the viscoelastic gravita-tional dislocation theory[J].Computer and Geosciences,2006,32:527-541.
10Wang R,Lorenzo-Martin F and F.Roth F.Computation of deformation induced by earthquakes in a multi-layered e-lastic crust-FORTRAN programs EDGRN/EDCMP[J].Computer and Geosciences,2003,29:195-207.
11袁旭东,等.同震变形中模型分层和重力影响研究[J].大地测量与地球动力学,2007,27(1):69-76.11Yuan Xudong,al et.On influences of earth stratification and gravitation on co-seismic deformation[J].Journal of Geodesy and Geodynamics,2007,27(1):69-76.(in Chinese)
12周民都,等.青藏高原东北缘及其邻区的地壳结构与地震关系初探[J].西北地震学报,1997,19(1):58-69.12Zhou Mindu,et al.The relationship between crust struc-ture and earthquakes in the northeast verge of Qinghai Tibet Plateau and its neighborhood[J].Northwestern Seismologi-cal Journal,1997,19(1):58-69.(in Chinese)
13沈正康,等.东昆仑活动断裂带大地震之间的黏弹性应力触发研究[J].地球物理学报,2003,46(6):786-795.13Shen Zhengkang,et al.Visco-elastic triggering among large earthquakes along the east Kunlun fault system[J].Chinese J.Geophys.,2003,46(6):786-795.(in Chi-nese)
14徐锡伟,等.2001年11月14日昆仑山库赛湖地震(Ms8.1)地表破裂带的基本特征[J].地震地质,2002,24(1):1-13.14Xu Xiwei,et al.Characteristic features of the surface rup-tures of the Hosaihu(Kunlunshan)earthquake(Ms8.1),northern Tibet Plateau[J].Seismology and Geology,2002,24(1):1-13.(in Chinese)
15陈杰,等.2001年昆仑山口西Ms8.1地震地表同震位移分布特征[J].地震地质,2004,26(3):378-392.15Chen Jie,al et.Surficial slip distribution and segmentation of the426-km-long surface rupture of the14november,2001,Ms8.1earthquake on the east Kunlun fault,north-ern Tibetan Plateau,China[J].Seismology and Geology,2004,26(3):378-392.(in Chinese)
16任金卫,王敏.GPS观测的2001年昆仑山口西Ms8.1地震地壳变形[J].第四纪研究,2005,25(1):34-44.16Ren Jinwei and Wang Min.GPS measured crustal deforma-tion of theMs8.1Kunlun earthquake on November14th2001in Qinghai-Tibet Plateau[J].Quaternary Science,2005,25(1):34-44.(in Chinese)
2单新建,柳稼航,马超.2001年昆仑山口西Ms8.1地震同震形变场特征的初步分析[J].地震学报,2004,26(5):474-480.2Shan Xinjian,Liu Jiahang and Ma Chao.The preliminary a-nalysis on the features of co-seismic deformation of the westof Kunlunshan pass earthquake(Ms8.1)in2001[J].Acta Seismologica Sinica,2004,26(5):474-480.(in Chinese)
3乔学军,等.昆仑山口西Ms8.1地震的地壳形变特征[J].大地测量与地球动力学,2002,22(4):6-11.3Qiao Xuejun,et al.Characteristics of crustal deformation re-lated toMs8.1Kunlunshan earthquake[J].Journal of Ge-odesy and Geodynamics,2002,22(3):6-11.(in Chi-nese)
4张晓亮,等.昆仑山口西Ms8.1地震同震形变场的模拟分析[J].大地测量与地球动力学,2007,27(2):16-21.4Zhang Xiaoliang,et al.Simulation and analysis of coseismic deformation field ofMs8.1earthquake in west to Kunlun mountain pass[J].Journal of Geodesy and Geodynamics,2007,27(2):16-21.(in Chinese)
5张艳梅,等.基于DINSAR的2001年昆仑山口西8.1级大地震形变探测[J].大地测量与地球动力学,2007,27(3):12-17.5Zhang Yanmei,et al.Seismic deformation detection ofMs8.1earthquake in west to Kunlun mountain pass in2001with DInSAR[J].Journal of Geodesy and Geodynamics,2007,27(3)12-17.(in Chinese)
6万永革,等.利用GPS和水准测量资料反演2001年昆仑山口西8.1级地震的同震滑动分布[J].地震地质,2004,26(3):393-404.6Wan Yongge,et al.Co-seismic slip distribution of the2001west of Kunlun mountain pass earthquake inverted by GPS and leveling data[J].Seismology and Geology,2004,26(3):393-404.(in Chinese)
7谭凯,王琪,申重阳.用大地测量数据反演2001年昆仑山地震[J].大地测量与地球动力学,2004,24(3):47-50.7Tan Kai,Wang Qi and Shen Chongyang.Using geodetic da-ta to inverse co-seismic dislocation of2001Kunlun earth-quake[J].Journal of Geodesy and Geodynamics,2004,24(3):47-50.(in Chinese)
8马超,单新建.昆仑山Ms8.1地震震源参数的多破裂段模拟研究[J].地球物理学报,2006,49(2):428-437.8Ma Chao and Shan Xinjian.A multi-segment analytic simu-lation of hypocentral geometric characteristic parameters of theMs8.1earthquake at the Kunlun mountains[J].Chinese Journal of Geophysics,2006,49(2):428-437.(in Chi-nese)
9Wang R F,Lorenzo-Martin and Roth F.PSGRN/PSCMP-a new code for calculating co-and post-seismic deformation,geoid and gravity changes based on the viscoelastic gravita-tional dislocation theory[J].Computer and Geosciences,2006,32:527-541.
10Wang R,Lorenzo-Martin F and F.Roth F.Computation of deformation induced by earthquakes in a multi-layered e-lastic crust-FORTRAN programs EDGRN/EDCMP[J].Computer and Geosciences,2003,29:195-207.
11袁旭东,等.同震变形中模型分层和重力影响研究[J].大地测量与地球动力学,2007,27(1):69-76.11Yuan Xudong,al et.On influences of earth stratification and gravitation on co-seismic deformation[J].Journal of Geodesy and Geodynamics,2007,27(1):69-76.(in Chinese)
12周民都,等.青藏高原东北缘及其邻区的地壳结构与地震关系初探[J].西北地震学报,1997,19(1):58-69.12Zhou Mindu,et al.The relationship between crust struc-ture and earthquakes in the northeast verge of Qinghai Tibet Plateau and its neighborhood[J].Northwestern Seismologi-cal Journal,1997,19(1):58-69.(in Chinese)
13沈正康,等.东昆仑活动断裂带大地震之间的黏弹性应力触发研究[J].地球物理学报,2003,46(6):786-795.13Shen Zhengkang,et al.Visco-elastic triggering among large earthquakes along the east Kunlun fault system[J].Chinese J.Geophys.,2003,46(6):786-795.(in Chi-nese)
14徐锡伟,等.2001年11月14日昆仑山库赛湖地震(Ms8.1)地表破裂带的基本特征[J].地震地质,2002,24(1):1-13.14Xu Xiwei,et al.Characteristic features of the surface rup-tures of the Hosaihu(Kunlunshan)earthquake(Ms8.1),northern Tibet Plateau[J].Seismology and Geology,2002,24(1):1-13.(in Chinese)
15陈杰,等.2001年昆仑山口西Ms8.1地震地表同震位移分布特征[J].地震地质,2004,26(3):378-392.15Chen Jie,al et.Surficial slip distribution and segmentation of the426-km-long surface rupture of the14november,2001,Ms8.1earthquake on the east Kunlun fault,north-ern Tibetan Plateau,China[J].Seismology and Geology,2004,26(3):378-392.(in Chinese)
16任金卫,王敏.GPS观测的2001年昆仑山口西Ms8.1地震地壳变形[J].第四纪研究,2005,25(1):34-44.16Ren Jinwei and Wang Min.GPS measured crustal deforma-tion of theMs8.1Kunlun earthquake on November14th2001in Qinghai-Tibet Plateau[J].Quaternary Science,2005,25(1):34-44.(in Chinese)
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