jgg     2010 30 (5):  19-23    ISSN: 0412-1961  CN: 21-1139/TG STATISTICAL ANALYSIS OF PRE-EARTHQUAKE IONOSPHERIC TEC DISTURBANCE Zhu Fuying 1,2) ;Wu Yun 1,2) ;Zhou Yiyan 1,2) ; and Lin Jian 1,2,3) 1)Institute of Seismology, CEA, Wuhan 430071 2)Crustal Movement Laboratory, Wuhan 4300713)Rearch Center of Satellite Navigation and Position Technology of Wuhan University, Wuhan 430079 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null