Stefan Eriksson, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, Daniel N Baker, University of Colorado, Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, David L Newman, Univ Colorado, Boulder, CO, United States, Giovanni Lapenta, Katholieke Universiteit Leuven, Department of Mathematics, Leuven, Belgium and Lynn B Wilson III, NASA Goddard Space Flight Center, Heliospheric Physics Laboratory, Code 672, Greenbelt, MD, United States