On the basis of detail geological investigations of the surface rupture zone caused by Wenchuan Ms8.0 earthquake by use of differential GPS measurement,the characteristics of spatial distribution of surface rupture zone are known that a 200 km-long surface rupture was formed along the Beichuan-Yingxiu fault in the Wenchuan Ms8.0 earthquake.It also triggered the activity of the Guanxian-Jiangyou fault as indicated by an 75 km-long surface rupture.The distribution of earthquake surface rupture shows that the ...