Auroral bright spots on the dayside oval

Details Auroral bright spots on the dayside oval Auroral bright spots on the dayside oval

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.5515l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, May 1, 1989, p. 5515-5522.

Physics

68

Auroras, Earth Magnetosphere, Geomagnetic Tail, Kelvin-Helmholtz Instability, Viking Spacecraft

Scientific paper

Global auroral images from the UV imager on the Viking spacecraft are used to investigate spatially periodic bright spots on the dayside auroral oval that resemble beads on a string. The newly achieved temporal resolution of 1 min or less in monitoring worldwide auroral distributions contributes significantly to the capability of observing this phenomenon. It is found that these are frequently seen in the 1400-1600 MLT sector. The series of bright spots are not, however, limited to this unique local time sector, since they are seen to extend into the prenoon sector on some occasions. They occur often during substorm intervals but are also seen unaccompanied by substorm activities in the nightside.

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