Physics of auroral phenomena : proceedings of the 33rd Annual seminar, Apatity, 02 - 05 March, 2010 / [ed.: A.G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 206 с. : ил.

Nonlinear connection o f ring current and auroral electrojets activity with Solar wind and Interplanetary magneticfield parameters Fig. 1. (continue) Examples of the neural network reconstruction of auroral electrojets and ring current intensity indices on the PSW and IMF data. The solid line shows real values of indices and dashed line - the values of indices reconstructed by neural network. For influence degree estimation of concrete parameter (PSW or IMF) on ring current and auroral electrojets current systems development for each examined pair of indices have been calculated a statistical weight of successful reconstruction: w = — tn j here N - number of cases with correlation coefficient > 0.4, C"m - the general number of events combinations from m=30 on n=2. Statistical weights are submitted on diagrams Fig. 2. Ring current 0 J6 Fig. 2. Statistical weights values for considered pairs of indices The distribution o f successful reconstruction statistical weights for auroral electrojets indices and ring current symmetric and asymmetric parts indices has shown: 1. Solar wind velocity, IMF component Bz and to a lesser degree Solar wind density have the greatest influence on auroral electrojets development during the main phase of a geomagnetic storm. Influence of By component expressed poorly. 2. Statistical weights for westward electrojet (AL) are in the main higher than for eastward electrojet (AU). It can mean that on the main phase of a magnetic storm westward electrojet developed more strongly than eastward electrojet. Westward electrojet is caused by intensive magnetic reconnection on day time N-SYM V- SYM V-ASY Вг -SYM Вг-ASY Auroral electrojets i l Вг-AU B:-AL By -SYM By-ASY MSY '/•AS SYM -ASY В2-5УМ B2-ASV 23