Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 12817 10.12737/20997 Results of current research Results of current research Results of current research Some peculiarities in longitude distribution of sunspot groups over last four eleven-year solar cycles Some peculiarities in longitude distribution of sunspot groups over last four eleven-year solar cycles Рыбак Алексей Леонидович Rybak Alexey Leonidovich solarfish@alexeyryback.ru Главная астрономическая обсерватория РАН Санкт-Петербург Россия Central Astronomical Observatory of Pulkovo of RAS Saint Petersburg Russian Federation 08 08 2016 08 08 2016 2 2 28 36 https://naukaru.ru/en/nauka/article/12817/view

This paper considers a longitude distribution of sunspot groups over 1982–2013, using data from the National Geophysical Data Center (Boulder, USA). The space-time distribution of sunspot groups is analyzed in coordinate sectors calculated from heliographic longitudes of the groups. A longitude extent of a coordinate sector is compared to the average size of one active region (30–40°). Then, in each coordinate sector, evolutionary activity of sunspot groups is summarized according to classification values after Malde throughout the observation period. The longitude distribution of large sunspot groups plotted in such a way does not reveal anticorrelation between Northern and Southern hemispheres in sunspot cycle 23.

This paper considers a longitude distribution of sunspot groups over 1982–2013, using data from the National Geophysical Data Center (Boulder, USA). The space-time distribution of sunspot groups is analyzed in coordinate sectors calculated from heliographic longitudes of the groups. A longitude extent of a coordinate sector is compared to the average size of one active region (30–40°). Then, in each coordinate sector, evolutionary activity of sunspot groups is summarized according to classification values after Malde throughout the observation period. The longitude distribution of large sunspot groups plotted in such a way does not reveal anticorrelation between Northern and Southern hemispheres in sunspot cycle 23.

 Sunspot cycle active longitudes classification values after Malde coordinate sector postdictors of active regions Sunspot cycle active longitudes classification values after Malde coordinate sector postdictors of active regions

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