Global Geology     2020 23 (3):  149-154    ISSN: 1673-9736:  CN: 22-1371/P Method for extracting angle-domain common image gathers in Kirchhoff beam migration ZHANG Zhihou1, YAO Yu1, SUN Hui1,2, YANG Junjie1, LI Meng1 1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China; 2. School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China Received 2020-01-06  Revised 2020-03-01  Online 2020-09-25 Reference  null Corresponding author: SUN Hui