jgg     2007 27 (1):  91-95    ISSN: 0412-1961  CN: 21-1139/TG Liao Chengwang 1,2) ; Deng Tao 1,2) ; Ding Wei 1,2) ;Tan Yaoyin 1,2) ; and Chen Liang 1,2) 1) Institute of Seismology, CEA, Wuhan 430071 2) Crustal Movement Laboratory, Wuhan 430071 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null