Dayside moving auroral transients related to LLBL dynamics
Moen, J., Evans, D., Carlson, H. C. and Lockwood, M. (1996) Dayside moving auroral transients related to LLBL dynamics. Geophysical Research Letters, 23 (22). pp. 3247-3250. ISSN 0094-8276
To link to this item DOI: 10.1029/96GL02766
The NOAA-12 satellite skimmed through a region of dayside auroral activity over Svalbard on January 12, 1992. A sequence of auroral forms from two separated onset sites in the postnoon sector drifted westward towards magnetic noon. The auroral forms were associated with a population of injected magnetosheath plasma mixed with a secondary component of magnetospheric ions (>30 keV) that is a key signature of the low-latitude boundary layer (LLBL). The direction of motion of the cleft auroral forms and the basic features of the NOAA particle spectrograms indicate that the transients are related to LLBL on open field lines. The auroral transients are consistent with footprints of reconnection at the dayside magnetopause which is both patchy in space and sporadic in time.