PDF Download HTML

[1]BI Yanlei,ZHANG Yongzhi,CAO Haikun,et al.The Wenchuan MW7.9 Earthquake Slip Distribution Inversion Based on Automated Fault Discretization Method[J].Journal of Seismological Research,2017,40(02):211-215.

Copy

The Wenchuan M_W7.9 Earthquake Slip Distribution Inversion Based on Automated Fault Discretization Method

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 40 Number of periods: 2017 02 Page number: 211-215 Column: Public date: 2017-04-23

Title:: The Wenchuan M_W7.9 Earthquake Slip Distribution Inversion Based on Automated Fault Discretization Method

Author(s):: BI Yanlei; ZHANG Yongzhi; CAO Haikun; YANG Jiuyuan; YANG Zhen; (School of Geology Engineering and Geomatics,Chang’an University,Xi’an 710064,Shaanxi,China)

Keywords:: automated fault discretization; coseismic slip distribution; dislocation element; seismic moment; GPS data

CLC:: P315.241

DOI:: -

Abstract:: Based on GPS data,we have inversed the Wenchuan M_W7.9 coseismic slip distributions by utilizing automated fault model discretization method. The results show:(1)The slip distributions based on automated fault model discretization appear well smooth.(2)It was a thrust-type earthquake with a small amount of right-lateral slip component. In Yingxiu-Beichuan fracture zone,the maximal sliding reached 15 m,average magnitude is 2.61 m. In the Guanxian-Jiangyou fracture zone,the maximal sliding reached 8 m,average sliding magnitude is 1.58 m. Meanwhile the inversed seismic moment M₀ is 9.153 8×10²⁰N·m corresponding to moment magnitude M_W is 7.91.(3)The comparison between forward modeling results and the measured results shows that the displacement fields are consistent on the trend of movement,the root mean square error(RMSE)within a reasonable range,and this also verifies the feasibility of automated fault model discretization method.

References:: 陈丹蕾.2014.基于雷达差分干涉测量与断层自动剖分方法的地震震源参数反演[D].成都:西南交通大学.
国家重大科学工程“中国地壳运动观测网络”项目组.2008.GPS测定的2008年汶川M_S8.0地震的同震位移场[J].中国科学:地球科学,38(10):1195-1206.
季灵运,刘立炜,郝明.2015.利用InSAR技术研究滇西南镇康—永德地区现今地壳形变特征[J].地震研究,38(1):84-89.
王敏.2009.基于GPS同震位移场约束反演2008年5.12汶川大地震破裂空间分布[J].地球物理学报,52(10):2519-2526.
王帅,张永志,姜永涛,等.2014.维多样性的动态权重粒子群算法反演断层滑动速率[J].地球物理学进展,(4):1766-1771.
王卫民,赵连锋,李娟,等.2008.四川汶川8.0级地震震源过程[J].地球物理学报,51(5):1403-1410.
温扬茂,何平,许才军,等.2012a.联合Envisat和ALOS卫星影像确定L’Aquila地震震源机制[J].地球物理学报,55(1):53-65.
温扬茂,许才军,刘洋,等.2012b.利用断层自动剖分技术的2008年青海大柴旦M_W6.3级地震InSAR反演研究[J].武汉大学学报(信息科学版),37(4):458-462.
许才军,刘洋,温扬茂.2009.利用GPS资料反演汶川M_W7.9级地震滑动分布[J].测绘学报,38(3):195-201,215.
张国宏,屈春燕,汪驰升,等.2010.基于GPS和InSAR反演汶川M_W7.9地震断层滑动分布[J].大地测量与地球动力学,30(4):19-24.
张培震,徐锡伟,闻学泽,等.2008.2008年汶川8.0级地震发震断裂的滑动速率、复发周期和构造成因[J].地球物理学报,51(4):1066-1073.
张永志,王卫东,魏玉明,等.2006.利用GPS资料反演祁连山断层的三维滑动速率[J].大地测量与地球动力学,26(1):31-35.
BARNHART W D,LOHMAN R B.2010.Automated Fault Model Discretization for Inversions for Coseismic Slip Distributions[J].Journal of Geophysical Research:Solid Earth,115(B10),DOI:10.1029/2010JB007545.
FUNNING G J,PARSON B,WRIGHT T J,et al.2005.Surface Displacements and Source Parameters of the 2003 Bam(Iran)Earthquake from Envisat Advanced Synthetic Aperture Radar Imagery[J].Journal of Geophysical Research:Solid Earth,110(B9),DOI:10.1029/2004JB003338.
OKADA Y.1992.Internal deformation due to shear and tensile faults in a half-space[J].Bulletin of the Seismological Society of America,82(2):1018-1040.
USGS.2008.Magnitude 7.9-EASTERN SICHUAN,China[EB/OL].(2008)[2016-11-01].http://earthquake.usgs.gov/eqdenter/eqinthenews/2008/us2008ryan.

Similar References:

Memo

Last Update: 2017-06-10