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《Chinese Journal of Engineering Geophysics》 2017-05
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Calculation of Horizontal Strain of Coseismic Crust in Wenchuan Based on Power Function

Cui Jinye;Duan Hurong;College of Geomatics,Xi'an University of Science and Technology;  
The velocity field model of crustal movement is constructed by the principle of least squares based on power function,and on this basis,the computational formula of crustal horizontal strain is obtained by the derivation of velocity field model.The crustal horizontal strain in this region is calculated by the observation data of coseismic GPS(Global Position System)from Wenchuan earthquake of 2008.Results show that the spatial distribution of the main strain in Wenchuan area is inhomogeneous,and the main strain is close to the vertical with the extension of Longmenshan fault.With the main pressure strain,in the south and north of Wenchuan area,the tensile strain is stronger than the extrusion strain.Wenchuan area is in the transition zone of maximum shear strain between the northern region and the southern region.
【Fund】: 国家自然科学基金项目(编号:41304013;41374028);; 西安科技大学博士基金项目(编号:2014QDJ054)
【CateGory Index】: P227;P315.2
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