jgg     2013 33 (增2):  12-15    ISSN: 0412-1961  CN: 21-1139/TG ANALYSIS OF GEOELECTRIC FIELD OBSERVATION IN WUHAN  JIUFENG SEISMOSTATION Earthquake Administration of Hubei Province, Wuhan 430071 Received: 2012-10-23  Revised: null  Online: 2013-10-24 Supporting info