Recurrent propagating auroral forms in pulsating auroras

Details Recurrent propagating auroral forms in pulsating auroras Recurrent propagating auroral forms in pulsating auroras

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jatp...43..243t&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 43, Mar. 1981, p. 243-254. Research supported by the Science Research Coun

Physics

16

Auroras, Imaging Techniques, Magnetohydrodynamic Waves, Plasma Interactions, Plasma Oscillations, Auroral Arcs, Auroral Zones, Latitude, Magnetic Disturbances, Sky Brightness, Spatial Distribution

Scientific paper

Observations of pulsating auroras with an all-sky Isocon TV system made from Poker Flat Research Range, Alaska, and Andoya rocket range, Norway, have revealed that auroral forms propagating like waves, predominantly in the meridional direction, are a significant proportion of the group of auroras commonly labelled pulsating auroras. The wavelike forms are described and compared with pulsating patches. Characteristics of the two types differ sufficiently that the possibility of different mechanisms should be considered. Propagation of the wave forms continues up to discrete arcs on the poleward edge of the diffuse aurora. One example is presented where no enhancement was observed within black aurora when the wave forms encountered this on their propagation path.

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