Huayue Chen, University of Science and Technology of China, Hefei, China, Xinliang Gao, University of Science and Technology of China, Department of Geophysics and Planetary Science, Hefei, China, Quanming Lu, Univ. Sci. & Tech. of China, Hefei, China, Nikolai A Tsyganenko, Saint-Petersburg State University, Saint-Petersburg, Russia and Yongcun Zhang, National Space Science Center, CAS, SKL of Space Weather, Beijing, China