Nightside detached auroras due to precipitating ... - Wiley Online Library

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from the equatorward edge of the diffuse aurora [Vondrak et al., 1983]. More progress in ..... in the night-dusk sector, NDA could be observed in mid- night and ...
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 110, A02206, doi:10.1029/2004JA010498, 2005

Nightside detached auroras due to precipitating protons//ions during intense magnetic storms Y. Zhang, L. J. Paxton, D. Morrison, B. Wolven, H. Kil, and S. Wing Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA Received 25 March 2004; revised 14 October 2004; accepted 5 November 2004; published 11 February 2005.

[1] Nightside detached auroras (NDA) during intense magnetic storms are studied by

using FUV image data from Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED)/Global Ultraviolet Imager (GUVI), Imager for Magnetopause-toAurora Global Exploration (IMAGE)/FUV, and particle data from DMSP/SSJ/4 instruments. We found that NDA are caused by proton/ion precipitation only. Thin arcshaped NDA are very likely due to soft (

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