Hanying Wei, University of California Los Angeles, Los Angeles, CA, United States, Lan K. Jian, NASA Goddard Space Flight Center, Greenbelt, MD, United States, C. T. Russell, UCLA, Los Angeles, CA, United States, Daniel J Gershman, NASA Goddard Space Flight Center, Heliophysics Science Division, Greenbelt, MD, United States and William R Paterson, NASA Goddard Space Flight Center, Geospace Physics Laboratory, Greenbelt, MD, United States