jgg     2013 33 (增1):  71-75    ISSN: 0412-1961  CN: 21-1139/TG ANALYSIS ON TEMPERATURE GRADlENT IN THREE GEORGES  WELLS NETWORK 1）Key Laboratory of Earthquake Geodesy, Institute of Seismolody, CEA, Wuhan 430071 2）Wuhan Base of Institute of Crustal Dynamics, CEA, Wuhan 430071 Received: 2013-05-28  Revised: null  Online: 2013-09-25 Supporting info