jgg     2009 29 (3):  11-15    ISSN: 0412-1961  CN: 21-1139/TG GRAVITY EFFECT FROM PRESENT ACTIVITY OF NORTHERN SEGMENT OF RED RIVER FAULT ZONE Sun Shaoan 1,2) ; Shen Chongyang 1,2) ;and Xiang Aiming 1,2) 1)Institute of Seismology, CEA, Wuhan 4300712)Crustal Movement Laboratory, Wuhan 430071 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null