Astrophysics and Space Science

, Volume 181, Issue 1, pp 111–115 | Cite as

The distribution of sunspots over the Sun

  • Wahab Uddin
  • M. C. Pande
  • V. K. Verma


The distribution of the sunspots for the period 1967–1987 (solar cycles 20 and 21) is presented here. We find that the ±11–20° latitude belt is most prolific for the occurrence of various spot types irrespective of magnetic-field ranges. Furthermore, longitudinally sunspots occur most prolifically at six or more places on the Sun. Spatially 7–9 zones are present in each hemisphere (north or south) of the Sun where about 50% sunspots occur and occupy only about 4% area of the Sun. During the above cycles at least 5 flare zones were regularly present in each hemisphere. The existing models cannot explain these active zones on the Sun. Thus, the present analysis emphasizes the need for a new magnetic models of the Sun.


Flare Solar Cycle Active Zone Magnetic Model Latitude Belt 
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Copyright information

© Kluwer Academic Publishers 1991

Authors and Affiliations

  • Wahab Uddin
    • 1
  • M. C. Pande
    • 1
  • V. K. Verma
    • 1
  1. 1.Uttar Pradesh State ObservatoryNaini TalIndia

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