jgg     2015 35 (2):  331-335    ISSN: 0412-1961  CN: 21-1139/TG Gravity Variation Observed by Scientific Expedition of Lushan Earthquake 1〓College of Earth Sciences, University of Chinese Academy of Science, A 19 Yuquan Road, Beijing 100049, China 2〓Key Laboratory of Earthquake Geodesy, Institute of Seismology,CEA,40 Hongshance Road, Wuhan 430071, China 3〓Wuhan Base of Institute of Crustal Dynamic,CEA,40 Hongshance Road, Wuhan 430071, China 4〓Surveying Engineering Institute, Earthquake Administration of Sichuan Province,139 Shangba Road, Ya’an 625000, China 5〓First Crust Monitoring and Application Center，CEA，7 Naihuo Road, Tianjin 300180, China 6〓Second Crust Monitoring and Application Center, CEA, 316 Xiying Road, X i’an 710054, China Received: 2014-03-16  Revised: null  Online: 2015-04-15 Supporting info