Auroral and magnetic variations in the polar cusp and cleft - Signatures of magnetopause boundary-layer dynamics

Details Auroral and magnetic variations in the polar cusp and cleft - Signatures of magnetopause boundary-layer dynamics Auroral and magnetic variations in the polar cusp and cleft - Signatures of magnetopause boundary-layer dynamics

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.144..171s&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 144, no. 1-2, May 1988, p. 171-199.

Astronomy and Astrophysics

Astrophysics

17

Atmospheric Boundary Layer, Auroras, Geomagnetism, Magnetic Variations, Magnetopause, Polar Cusps, Birkeland Currents, Interplanetary Magnetic Fields, Magnetic Signatures, Magnetic Storms, Solar Terrestrial Interactions

Scientific paper

By combining continuous ground-based observations of polar cleft/cusp auroras and local magnetic variations with electromagnetic parameters obtained from satellites in polar orbit (low-altitude cleft/cusp) and in the magnetosheath/interplanetary space, different electrodynamic processes in the polar cleft/cusp have been investigated. One of the more controversial questions in this field is related to the observed shifts in latitude of cleft/cusp auroras and the relationship with the interplanetary magnetic field (IMF) orientation, local magnetic disturbances and magnetospheric substorms. A new approach which may contribute to clarifying these complicated relationships - simultaneous ground-based observations of the midday and evening-midnight sectors of the auroral oval - is illustrated.

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