Phase shifts of the paired wings of butterfly diagrams

@article{Li2010PhaseSO,
  title={Phase shifts of the paired wings of butterfly diagrams},
  author={Kejun Li and Hongfei Liang and Wen Feng},
  journal={Research in Astronomy and Astrophysics},
  year={2010},
  volume={10},
  pages={1177-1185}
}
Sunspot groups observed by the Royal Greenwich Observatory/US Air Force/NOAA from 1874 May to 2008 November and the Carte Synoptique solar filaments from 1919 March to 1989 December are used to investigate the relative phase shift of the paired wings of butterfly diagrams of sunspot and filament activities. Latitudinal migration of sunspot groups (or filaments) does asynchronously occur in the northern and southern hemispheres, and there is a relative phase shift between the paired wings of… Expand

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