Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29j.118s&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 10, pp. 118-1, CiteID 1480, DOI 10.1029/2002GL014762
Physics
Magnetospheric Physics: Ring Current, Magnetospheric Physics: Energetic Particles, Precipitating, Magnetospheric Physics: Current Systems (2409), Magnetospheric Physics: Storms And Substorms, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions
Scientific paper
It is shown that a newly devised field-aligned current index AF is well correlated with the Dst index, the correlation coefficient being 0.93. The AF index is based on the fact that geomagnetic Y (or D) component variations in the middle and low latitudes are mainly caused by field-aligned currents. It is also demonstrated that energetic neutral atom (ENA) emissions measured by the Geotail satellite are well correlated with the AF index.
Akasofu Syuh-Ichi
Sun WaiChing
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