Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 52, p. 43-47 (2015)

Sunspot group indices for long-term prediction of geomagnetic activity

N. Lozitska, Ph. D. in Phys. and Math. Sci.,
V. Efimenko, Ph. D. in Phys. and Math. Sci.
Taras Shevchenko National University of Kyiv, Kyiv

Abstract
The solar-terrestrial relations were studied at intervals of ten years on materials of ground-based observations of the solar photosphere andinternational geomagnetic activity data. We have obtained evidence of synchronous secular variation of magnetic field, area and length of large sunspot groups, which together with their parameters of 11-year variations and correlations with geomagnetic indices allow us to predictgeomagnetic perturbation level in the next cycle of solar activity.

Keywords
solar activity, cycle of solar activity, sunspots groups, predict of geomagnetic activity

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