Physics
Scientific paper
Nov 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3521105f&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 21, CiteID L21105
Physics
5
Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Ionosphere: Current Systems (2721), Magnetospheric Physics: Magnetosphere/Ionosphere Interactions (2431)
Scientific paper
The effect on geomagnetic activity of solar wind speed, compared with that of the strength of the interplanetary magnetic field, differs with geomagnetic latitude. In this study we construct a new index based on monthly standard deviations in the H-component of the geomagnetic field for all geomagnetic latitudes. We demonstrate that for this index the response at auroral regions correlates best with interplanetary coupling functions which include the solar wind speed while mid- and low-latitude regions respond to variations in the interplanetary magnetic field strength. These results are used to isolate the responsible geomagnetic current systems.
Finch I. D.
Lockwood M. L.
Rouillard Alexis P.
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