Unusual refilling of the slot region between the Van Allen radiation belts

Xiaochao Yang, Chinese Academy of Sciences, Beijing, China, Jiang Yu, Beihang Univ, Beihang University, Beijing, China, Binbin Ni, University of California Los Angeles, Los Angeles, CA, United States, Yang Zhang, Wuhan University, Wuhan, China and Xiaoxin Zhang, China Meteorological Administration, Beijing, China