Physics
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..339p&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 5, p. 339-342.
Physics
40
Interplanetary Magnetic Fields, Magnetopause, Solar Activity Effects, Solar Terrestrial Interactions, International Sun Earth Explorers, Ring Currents, Solar Cycles, Solar Wind
Scientific paper
ISEE-1 and -2 observations of the position of the magnetopause during solar cycle 21 are used to determine quantitatively the role of both internal and external influences. We find that the magnetopause is a function of the direction of the IMF and the magnitude of the solar wind momentum flux but depends only weakly on the ring current intensity. The magnetopause stand-off position is found to lie at a distance similar to that expected from theory for northward IMF, but is found to lie 0.5 Re closer to the Earth for southward IMF. When the position of the magnetopause is normalized for variations in the solar wind dynamic pressure, the magnetopause is found to move earthward 1 Earth radius for every 7.4 nT southward IMF, but remains at nearly a constant distance for northward IMF.
Petrinec Steven M.
Russell Christopher T.
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