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Zhang Junlong1),Chen Changyun1),Hu Chaozhong1),Yang Panxin1),Xiong Renwei1),Li Zhimin2),Ren Jinwei1)
Author NameAffiliation
Zhang Junlong1) 1) Institute of Earthquake Science,CEA,Beijing 100036,China 
Chen Changyun1) 1) Institute of Earthquake Science,CEA,Beijing 100037,China 
Hu Chaozhong1) 1) Institute of Earthquake Science,CEA,Beijing 100038,China 
Yang Panxin1) 1) Institute of Earthquake Science,CEA,Beijing 100039,China 
Xiong Renwei1) 1) Institute of Earthquake Science,CEA,Beijing 100040,China 
Li Zhimin2) 2) Earthquake Administration of Qinghai Province,Xining 810001,China 
Ren Jinwei1) 1) Institute of Earthquake Science,CEA,Beijing 100042,China 
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Surface Rupture and Coseismic Displacement of the M_S7.1 Yushu Earthquake
Zhang Junlong1),Chen Changyun1),Hu Chaozhong1),Yang Panxin1),Xiong Renwei1),Li Zhimin2),Ren Jinwei1)
Abstract:
On April 14,2010,a devastating earthquake measured 7.1 on the Richter scale struck Yushu county,Qinghai Province,China.Field geological investigation and remote sensing interpretation show that this earthquake generated an inverse "L-shaped" surface rupture zone,approximately 50km long.The surface rupture zone can be divided into three segments.Between the northern and middle segments of the surface rupture,there is a 16km-long segment,where no rupture was observed.The middle and the southern segments are arranged in a left-step manner,and there are right-step en echelon ruptures developed in the stepovers.The seismogenic structure is the Yushu fault,which is dominated by strike-slip with a small amount of thrust component.The earthquake results from the differential movements between the southern Qiangtang Block and northern Bayan Har Block.The earthquake recurrence interval is 185a~108a.Along an approximately 20km-long part of the Garzê-Yushu fault,between the southern surface rupture of Yushu MS7.1 earthquake and the 1896 earthquake,there is no surface rupture,its seismic risk needs further research.
Key words:  M_S7.1 Yushu earthquake  Earthquake surface rupture  Coseismic displacement  Sinistral strike-slip  Recurrence interval