Prediction of development of geomagnetic storms using the solar wind-magnetosphere energy coupling function epsilon

Details Prediction of development of geomagnetic storms using the solar wind-magnetosphere energy coupling function epsilon Prediction of development of geomagnetic storms using the solar wind-magnetosphere energy coupling function epsilon

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29.1151a&link_type=abstract

Planetary and Space Science, vol. 29, Nov. 1981, p. 1151-1158.

Computer Science

19

Coupling Coefficients, Earth Magnetosphere, Magnetic Storms, Solar Wind Velocity, Evolution (Development), Periodic Variations, Solar Activity Effects, Sudden Storm Commencements, Time Dependence

Scientific paper

The solar wind-magnetosphere energy coupling function epsilon is examined as a predictor for the development of magnetospheric storms and substorms in terms of the geomagnetic indices Dst and AE. The predicted ring current, which absorbs 70% of epsilon, is calculated, and the ring current field and solar wind compression field are determined. Figures are derived for the storm of March 16, 1974, and the preceding substorm, and predicted values for the Dst index are found to be too high. Subsequent calculations for a storm with an insignificant main phase, a mini-storm, regular storms, and storms of 48 hr or greater duration show reasonable agreement for the Dst and AE indices, implying that the time development of the main phase decrease can be predicted by monitoring epsilon upstream of the solar wind.

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