jgg     2013 33 (1):  29-34    ISSN: 0412-1961  CN: 21-1139/TG TEMPORAL AND SPATIAL EVOLUTION CHARACTERISTICS OF FAULT ACTIVITY BEFORE AND AFTER ZHANGBEI Ms6.2 EARTHQUAKE Li Layue1,2);Xing Chengqi2);Wu Anxu2);and Hu Leyin2) 1）Institute of Earthquake Science, China Earthquake Administration, Beijing 100036;2）Earthquake Administration of Beijing Municipality, Beijing 100080 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null