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Evolution of structures with an open magnetic flux over a hundred years

Published online by Cambridge University Press:  27 November 2018

Andrey Tlatov
Andrey Tlatov*
Affiliation:
Kislovodsk mountain astronomical station of the Pulkovo observatory, 357700, Gagarina str. 100Russia email: tlatov@mail.ru Kalmyk State University, Elista, Russia
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Abstract

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Reconstruction of regions with an open configuration of magnetic force lines was carried out according to synoptic Hα maps over a period of more than 100 years. It is shown that the maximum area of open structures in the cycle of solar activity is reached in the descending phase, 1÷2 years before the onset of the minimum. The total area of open structures in the current cycle n has a high correlation (r ~ 0.8) with the amplitude of the next activity cycle n + 1. There is also a secular envelope with a maximum in the middle of the 20th century.

Keywords

Sunsolar activitylong-term variations

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