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| GPS???????«?Mw6.6????????α? | |
| 引用本文： | 赵斌,谭凯,黄勇,王伟,张锐,廖华,乔学军,杜瑞林.GPS?????????Mw6.6????????α?[J].大地测量与地球动力学,2014,34(4):21-26. |
| 作者姓名： | 赵斌 谭凯 黄勇 王伟 张锐 廖华 乔学军 杜瑞林 |
| 作者单位： | 1）中国地震局地震研究所（地震大地测量重点实验室），武汉 430071 2）中国地震局地壳应力研究所武汉科技创新基地，武汉 430071 3）武汉大学卫星导航定位技术研究中心，武汉 430079 4）地壳运动监测工程研究中心，北京 100036 5）四川省地震局减灾救助研究所，成都〓610041 |
| 基金项目： | 地震行业科研专项（201208006）；科研院所基本科研业务费（所长基金）（IS201226042）；国家自然科学基金青年科学基金项目（41304019）。 |
| 摘 要： | ??????????????Χ??GPS??????????????з?????????t???????λ?????????α?????50 km??Χ????GPS????α???????????????????70 mm????????????30 s???????λ??????????????????α????????λ???????????У???С?????о???????????????29 km????????λ???21 mm????????150 km???λ???1??2 mm????GPS???????α????????????????????????????????????????????λ?????и???20 km????????廬?????0.6 m??GPS????????α??о????????????????????????????????ε????????????????? |
| 关 键 词： | ?????? ????λ?? ????α? ??????? ???????? |
| 收稿时间： | 2013-09-02 |
COSEISMIC DEFORMATION OF LUSHAN Mw6.6 EARTHQUAKE INFERRED FROM CONTINUOUS GPS |
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| Zhao Bin,Tan Kai,Huang Yong,Wang Wei,Zhang Rui,Liao Hua,Qiao Xuejun,Du Ruilin.COSEISMIC DEFORMATION OF LUSHAN Mw6.6 EARTHQUAKE INFERRED FROM CONTINUOUS GPS[J].Journal of Geodesy and Geodynamics,2014,34(4):21-26. | |
| Authors: | Zhao Bin Tan Kai Huang Yong Wang Wei Zhang Rui Liao Hua Qiao Xuejun Du Ruilin |
| Institution: | 1）Key Laboratory of Earthquake Geodesy，Institute of Seismology，CEA，Wuhan 430071 2)Wuhan Bose of Institute of Crustal Dynamics,CEA,Wuhan 430071 3）GNSS Research Center，Wuhan University，Wuhan 430079 4）National Earthquake Infrastructure Service，CEA，Beijing 100036 5）Disaster Relief Research Institute，Sichuan Provincial Earthquake Bureau，Chengdu 610041 |
| Abstract: | Both static coseismic displacements and high rate GPS (Global Positioning System）time series are processed and analyzed for continuous GPS stations around the epicenter of the Lushan earthquake.GPS stations less than 50 km far away from the epicenter record high rate GPS time series clearly，with the largest horizontal kinematic variation of about 70 mm.The near field surface deformation lasted for approximately 30 s.The static displacement pattern agrees well with the mechanism of thrust earthquake，such as 2008 Mw7.9 Wenchuan earthquake.Offsets are toward the epicenter，as amplitude decaying with distance.In our results，the largest horizontal offset of 21 mm is observed at SCTQ station，29 km far away from the epicenter.About 1-2 mm coseismic jumps could be detected up to about 150 km away from the epicenter.Observed surface displacements are modeled using Okada’s formulation of a single fault buried in infinite elastic half space.Simulated annealing algorithm is used to inverse optimum resolutions for fault location，width，length，depth，dip angle and average fault slip.Strike angle of fault is constrained to the result from fault plane solution using seismic waves.Our fault slip result shows that Lushan earthquake is a purely thrust event，which rupture only about 20 km around the epicenter in the fault plane，with average inverse slip about 0.6 m. |
| Keywords: | Lushan earthquake static coseismic deformation high rate GPS time series fault slip inversion thrust earthquake |
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