Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.2429f&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 24, p. 2429-2432.
Astronomy and Astrophysics
Astronomy
19
Auroras, Magnetic Field Reconnection, Magnetopause, Solar Planetary Interactions, Solar Wind, Space Plasmas, Earth Ionosphere, Earth Magnetosphere, Magnetic Flux, Sky Surveys (Astronomy)
Scientific paper
Poleward moving transients have been proposed to be ionospheric signatures of plasma transfer events taking place at the daysize magnetopause. They are usually observed to brighten at the equatorward edge of the dayside auroral oval and fade as they move into the polar cap. This paper reports the observation of a new type of poleward moving dayside auroral transient which has several cycles of intensity variations. Observations of these transient show a series of intensifications in brightness along the arc or rayed band during poleward motion accompanied by a brightening in the auroral oval. As they reach their extreme poleward position they brighten and then fade from view. This brightening sequence may be explained by multiple reconnection of the magnetic flux tube associated with the transient.
Deehr Charles S.
Fasel Gerard J.
Lee Clarence L.
Minow Joseph I.
Smith Reginald W.
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