Double dayside detached auroras: TIMED/GUVI observations

Abstract
<p>On August 19, 2003, TIMED/GUVI detected, for the first time, two separated (double) dayside detached auroras (D-DDA) simultaneously in all the GUVI channels, 121.6 nm, 135.6 nm, LBHS, and LBHL. The D-DDA was located at magnetic latitudes around -57\textdegree and -63\textdegree (L shell 3.4 and 4.9) in the 0900\textendash1030 MLT region. The high-latitude part of the D-DDA is much brighter than the low-latitude part. DMSP particle observation indicates that the source of the D-DDA is energetic (\~10 keV) precipitating protons/electrons from the ring current due to the solar wind dynamic pressure enhancements [<a class="referenceLink" href="http://onlinelibrary.wiley.com/doi/10.1029/2003GL018949/full$\#$grl17779-bib-0016" rel="references:$\#$grl17779-bib-0016" title="Link to bibliographic citation"><em>Zhang et al.</em>, 2002</a>] and/or northward turning of the IMF B<sub>z</sub>. Observations of the D-DDA provide the first single-event evidence of multiple peaks in the statistical distribution of proton fluxes at energetic around and below 10 keV at low L-shells [<a class="referenceLink" href="http://onlinelibrary.wiley.com/doi/10.1029/2003GL018949/full$\#$grl17779-bib-0008" rel="references:$\#$grl17779-bib-0008" title="Link to bibliographic citation"><em>Milillo et al.</em>, 2001</a>].</p>
Year of Publication
2004
Journal
Geophysical Research Letters
Volume
31
Date Published
05/2004
ISSN Number
0094-8276
URL
http://doi.wiley.com/10.1029/2003GL018949
DOI
10.1029/2003GL018949