North-south asynchrony and long-term variations of sunspot latitudes

N.V. Zolotova, D.I. Ponyavin

Research output


The long-term records of sunspot area available separately for Northern and Southern Hemispheres have been investigated by means of cross-recurrence technique. Phase component of the north-south asymmetry was extracted. This measure demonstrates long-period systematic variations with the sign change of hemispheric leading in 1930s and 1960s. Moreover phase north-south asynchrony anticorrelates with the so called magnetic equator, which was defined as difference of the mean sunspot latitudes between two hemispheres. Relationships of the phase north-south asynchrony, magnetic equator and butterfly diagrams are presented and discussed.
Original languageUndefined
Title of host publicationProceedings of the IAU Symposium No. 259 “Cosmic Magnetic Fields: From Planets, to Stars and Galaxies”
PublisherCambridge University Press
Publication statusPublished - 2009

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