Auroral glow equatorward from the auroral oval |
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| Authors: | V L Zverev Ya I Feldstein V G Vorobjev |
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| Institution: | 1. Polar Geophysical Institute, Kola Scientific Center, Russian Academy of Sciences, ul. Akademgorodok, Apatity, 184209, Russia
2. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Troitsk, Moscow region, Russia
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| Abstract: | On the basis of observations for the IGY period (visoplots) it is shown, that during magnetic storms diffuse glow is detected
at all latitudes between the lowest latitude of the visually observed auroral glow at the zenith and the auroral oval. The
diffuse glow region spatially coincides with the region of soft electron precipitation extending equatorward from the boundary
of the oval to the latitude of the plasmopause projections along the magnetic force lines to the ionosphere. Using published
materials on the diffuse glow dynamics and SAR arcs at the Yakutsk meridian, as well as simultaneous measurements of the DMSP
F9 satellite, we discuss the contribution from low-energy electron precipitation transfered via convection toward Earth from
the magnetosphere’s plasma sheet to excitation of 630.0 nm emission in low-intensity (<1.0 kR) SAR arcs. |
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