Fig. 6: Cusp and Nightside Aurora outflow sources observed by Cluster and Arase.
From: The variable source of the plasma sheet during a geomagnetic storm
a Bz component of the interplanetary magnetic field (IMF), propagated to the location of the Earth Bow Shock during Arase orbit 2. b SYM-H index. c, d Cluster H+ differential flux spectrum and pitch angle distribution over the range 40–200 eV. e, f Cluster O+ differential flux spectrum and pitch angle distribution over the range 40–200 eV. g, h Arase H+ differential flux spectrum and pitch angle distribution at 150 eV. i, j Arase O+ differential flux spectrum and pitch angle distribution at 639 eV. k He++/H+ density ratio at Wind/SWE (black) and at Arase (blue).
