jgg     2012 32 (4):  5-9    ISSN: 0412-1961  CN: 21-1139/TG RELOCATION OF AFTERSHOCKS OF YUSHU Ms7.1 EARTHQUAKE AND THEIR SPATIAL DISTRIBUTION CHARACTERISTICS Liu Qiaoxia 1) ; Sha Chengning 2) ; Yang Zhuoxin 1) ; and Duan Yonghong 1) 1)Geophysical Exploration Center, CEA,Zhengzho 450002;2)Earthquake Administration of Qinghai Province, Xining 810001 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null