Abstract
Southern Hemisphere poleward moving auroral forms
Space Sciences Laboratory, University of California Berkeley, Berkeley, California, USA
Space Sciences Laboratory, University of California Berkeley, Berkeley, California, USA
Space Sciences Laboratory, University of California Berkeley, Berkeley, California, USA
Lockheed Palo Alto Research Laboratories, Palo Alto, California, USA
This paper presents a statistical study of Southern Hemisphere poleward moving auroral forms (PMAFs) using optical data from
the US Automatic Geophysical Observatory network in Antarctica. These Southern Hemisphere events are compared with Northern
Hemisphere PMAFs, which have previously been observed during varied interplanetary magnetic field (IMF) configurations. The
frequency of PMAF occurrence is studied as a function of IMF orientation and magnetic local time. Southern Hemisphere PMAFs
are biased to Bz < 0 constituting 62% of events, but are frequently observed during conditions of Bz > 0 constituting 38% of events. Southern Hemisphere PMAFs share a similar IMF Bz dependence with Northern Hemisphere events [e.g.,
Published 14 March 2003.
Citation: (2003), Southern Hemisphere poleward moving auroral forms, J. Geophys. Res., 108(A3), 1114, doi:10.1029/2001JA007536.
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