Physics
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..131m&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, Feb. 1990, p. 131-134. Research supported by the Lockheed Independent Re
Physics
29
Auroras, Flux Transfer Events, Magnetic Field Configurations, Magnetic Field Reconnection, Daytime, Particle Precipitation, Polar Regions, Solar Terrestrial Interactions
Scientific paper
Five magnetic impulse events observed at South Pole and in the magnetically conjugate area at Iqaluit are presented. The magnetic signatures recorded during these events appear to be similar to those discussed by several authors as possible ionospheric signatures of sporadic dayside reconnection via the flux transfer process. Coordinated ground-based image-intensified all sky camera data were acquired at South Pole during the events. The optical data show that prior to the onset of each of the events the dayside cusp aurora is several degrees poleward of the station, signifying event initiation on closed field lines. Overhead aurora appears at the onset of the magnetic event and precipitation seems to expand over a large region equatorward of the quiescent cusp aurora. As the event decays the aurora dies away and the quiescent dayside cusp aurora, in four out of five cases, returns poleward of the station.
Lanzerotti Louis J.
Maclennan Carol G.
Mende Stephen B.
Rairden Richard L.
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