The role of the GSM-components of the geliospheric magnetic field in the formation of auroral power flux

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Space and Atmospheric Physics
1Reshetnyk, VN
1Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Kosm. nauka tehnol. 2004, 10 ;(4):066-073
https://doi.org/10.15407/knit2004.04.066
Publication Language: Ukrainian
Abstract: 
We analysed variations of the polar flux in northern and southern ovals in connection with changes of the direction of the geliospheric magnetic field near the Earth from 1978 to 2001. The increase of the auroral activity at southern orientation of the interplanetary magnetic field (Вz < 0) is confirmed. An asymmetric distribution of average values of the Вz -component in the ХУ-plane of the GSM-system is revealed. We found that the average activity of polar lights for both hemispheres is higher when Вx >0 under the northern orientation of the interplanetary magnetic field. For different hemispheres, the increase of the auroral activity is observed under different signs of the Вy -component of the interplanetary magnetic field. The seasonal variations of the auroral activity is revealed, namely, auroral power flux is maximum during equinoxes. The dependence of the auroral activity on azimuthal component of the interplanetary magnetic field decreases in winter and increases in summer.
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