Physics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgra..11108203z&link_type=abstract
Journal of Geophysical Research, Volume 111, Issue A8, CiteID A08203
Physics
1
Magnetospheric Physics: Auroral Phenomena (2407), Interplanetary Physics: Interplanetary Shocks, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Magnetic Storms And Substorms (7954)
Scientific paper
A new and unusual nightside auroral distortion was detected around 1400 UT on 11 December 2004 by TIMED/GUVI (northern hemisphere) and IMAGE/FUV (southern hemisphere). The distortion has a special ``tongue'' shape (possibly a special auroral streamer) and is called the Nightside Auroral Tongue (NAT) hereafter. We found that the NAT is a conjugate phenomenon. The NAT consists of both diffuse aurora and nearly north-south arcs. The NAT extended from ~72° Mlat to 62° Mlat in the 0100 MLT sector, well beyond the proton isotropic boundary (b2i) around 66° Mlat. The width of the NAT varies from 2 hour in MLT at magnetic latitude around 70° to 0.5 hour in MLT at Mlat < 65°. The width of the arcs within the NAT is only about 30 km on average. The observed unusual feature of NAT is associated with a strong IP shock and a large solar wind electric field.
Lui Anthony Tat Yin
Paxton Larry J.
Zhang Yajing
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