Abstract
The cause-and-effect relations of the dynamics of high-latitude geomagnetic activity (in terms of the AL index) and the type of the magnetic cloud of the solar wind are studied with the use of artificial neural networks. A recurrent neural network model has been created based on the search for the optimal physically coupled input and output parameters characterizing the action of a plasma flux belonging to a certain magnetic cloud type on the magnetosphere. It has been shown that, with IMF components as input parameters of neural networks with allowance for a 90-min prehistory, it is possible to retrieve the AL sequence with an accuracy to ~80%. The successful retrieval of the AL dynamics by the used data indicates the presence of a close nonlinear connection of the AL index with cloud parameters. The created neural network models can be applied with high efficiency to retrieve the AL index, both in periods of isolated magnetospheric substorms and in periods of the interaction between the Earth’s magnetosphere and magnetic clouds of different types. The developed model of AL index retrieval can be used to detect magnetic clouds.
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Original Russian Text © N.A. Barkhatov, S.E. Revunov, V.G. Vorobjev, O.I. Yagodkina, 2018, published in Geomagnetizm i Aeronomiya, 2018, Vol. 58, No. 2, pp. 155–162.
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Barkhatov, N.A., Revunov, S.E., Vorobjev, V.G. et al. Studying the Relationship between High-Latitude Geomagnetic Activity and Parameters of Interplanetary Magnetic Clouds with the Use of Artificial Neural Networks. Geomagn. Aeron. 58, 147–153 (2018). https://doi.org/10.1134/S0016793218020020
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DOI: https://doi.org/10.1134/S0016793218020020