jgg     2008 28 (6):  77-82    ISSN: 0412-1961  CN: 21-1139/TG RESEARCH OF EARTHQUAKE GEODESY Zhou Shuoyu;Wu Yun;Yao Yunsheng ;and Du Ruilin Institute of Seismology，CEA，Wuhan 430071 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null