A close look at the solar wind-magnetosphere interaction

Details A close look at the solar wind-magnetosphere interaction A close look at the solar wind-magnetosphere interaction

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.2162r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, April 1, 1984, p. 2162-2168. Research sponsored by the Bundesminister

Physics

3

Earth Magnetosphere, Geomagnetism, Solar Terrestrial Interactions, Solar Wind, Correlation, Coupling, Electrojets, Regression Analysis, Solar Rotation

Scientific paper

A study of the short term (12-hour) variation of the linear correlation between the solar wind-magnetosphere energy coupling function epsilon and the electrojet index AE revealed unexpectedly large variations of the correlation coefficient R and of the ratio between epsilon and AE. About half of all R values fell below the 95 percent confidence level, and the ratio between epsilon and AE varied by more than 100 percent of the average value, even when R was large. This result reveals that the epsilon function is not a very good predictor of substorms and their intensities. Several possible causes for the variations are discussed. It is shown that some of the variations of the correlation coefficient occur because of a variable temporal relationship between epsilon and AE.

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