Haaland, S., M. Andre, L. Baddeley, A. Barakat, R. Chappell, V. Eccles, A. Eriksson, C. Johnsen, K. Li, B. Lybekk, L. Maes, A. Pedersen, R. Schunk, D. Welling, Cluster observations of cold ion outflow during the GEM storms, GEM Workshop, Snowmass, Colorado, June 2015 (Invited talk)