Physics
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.2684y&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, March 1, 1989, p. 2684-2690.
Physics
10
Field Aligned Currents, Interplanetary Magnetic Fields, Magnetic Field Configurations, Polar Cusps, Geomagnetism, Ionospheric Currents, Magsat Satellites, Polar Caps
Scientific paper
Magnetic data from the Magsat satellite are used to study the spatial distribution and temporal variation of the IMF B(y)-dependent cusp region field-aligned currents (FACs) during quiet periods. It is shown that the FACs are located at about 86-87 deg invariant latitude local noon. The current density of this FAC is found to be greater than 4 muA/sq m for IMF B(y) = 6nT. The initial rise of the current is on a time scale of about 10 min and is followed by a gradual increase on a time scale of several hours to half a day.
Araki Takeo
Yamauchi Makoto
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