Astronomical School’s Report, 2004, Volume 5, Issue 1-2, Pages 79–87

https://doi.org/10.18372/2411-6602.05.1079
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UDC 528

Auroral activity in connection with structure of the heliospheric magnetic field

Reshetnik V.M., Dziubenko M.I.

Kyiv Shevchenko National University, Ukraine

Abstract

Variations of polar flux in northern and southern ovals and integral precipitation intensity were analyzed in connection with changes of the heliospheric magnetic field near the Earth. It is shown that polar flux increases when the magnetic field has Bz <0 and By <0, and when the magnitude of the interplanetary magnetic field increases. The seasonal variation of auroral precipitation intensity is observed also aurora activity is maximal during equinoxes and minimal during solstices. The dependence of the auroral precipitation on IMF orientation has a strong asymmetry in heliographic inertial coordinates (HGI) which amount to 50 per cent. Auroral intensity is maximum when the magnetic field is situated at the first quadrant of HGI coordinates.

Keywords:

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