Terry Zixu Liu, University of California Los Angeles, Los Angeles, CA, United States, Heli Hietala, University of Turku, Turku, Finland, Vassilis Angelopoulos, University of California, Los Angeles, Department of Earth, Planetary, and Space Sciences and Institute of Geophysics and Planetary Physics, Los Angeles, CA, United States, Yuri Omelchenko, UCSD, San Diego, CA, United States, Vadim Roytershteyn, Space Science Institute, Boulder, CO, United States and Rami O Vainio, Univ Helsinki, Helsinki, Finland