Evolution and slow decay of an unusual narrow ring of relativistic electrons near L~ 3.2 following the September 2012 magnetic storm, R. M. Thorne, W. Li, B. Ni, Q. Ma, J. Bortnik, D. N. Baker, Harlan E. Spence, G. D. Reeves, M. G. Henderson, C. A. Kletzing, W. S. Kurth, G. B. Hospodarsky, D. Turner, V. Angelopoulos
Physics & Astronomy