RESEARCH ON MAJOR CHARACTERISTICS OF GEOHAZARDS INDUCED BY THE YUSHU Ms7.1 EARTHQUAKE

The Yushu Ms 7.1 earthquake was happened at 7： 49 on April 14, 2010 in Yushu county of Qinghai province. Besides continuous surface rupture and a large number of properties collapse,the types of geohazards induced by earthquake include rock fall,landslide,potential debris flow,etc. In addition,the geohazards can be aggravated by the earthquakeinduced sandy soil liquefaction,as well as burst of a channel,in local areas. Based on field investigation and comparison of the geohazard data before and after the Yushu earthquake,the authors summarize the major characteristics of the Yushu Ms7.1 earthquake,such as the amount of geohazard increasing obviously after the earthquake,the distribution of geohazards controlled by the active faults,the lowposition soil/colluvial landslides predominant,the effect of geohazard chain being notable,etc. some proposals for geohazard control during reconstruction have been given forth in this paper．