The distribution of sunspots over the sun

Details The distribution of sunspots over the sun The distribution of sunspots over the sun

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.181..111u&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 181, no. 1, July 1991, p. 111-115.

Astronomy and Astrophysics

Astrophysics

6

Solar Activity, Spatial Distribution, Stellar Models, Sunspot Cycle, Sunspots, Magnetic Field Configurations, Solar Flares, Solar Magnetic Field

Scientific paper

The distribution of the sunspots for the period 1967-1987 (solar cycles 20 and 21) is presented here. It is found that the +/- 11-20 deg 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 percent sunspots occur and occupy only about 4 percent of area of the sun. During the above cycles at least five 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.

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