George John Wilkie, Princeton University, Princeton, NJ, United States, Enrico Camporeale, University of Colorado, Cooperative Institute for Research in Environmental Sciences, Boulder, United States; NOAA, Space Weather Prediction Center, Boulder, United States, Rakesh Sarma, Centrum Wiskunde & Informatica, Amsterdam, Netherlands, Jacob Bortnik, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States, Alexander Drozdov, University of California Los Angeles, Los Angeles, CA, United States and Yuri Shprits, GFZ German Research Centre for Geosciences, Potsdam, Germany