Statistical behavior of sunspot groups on the solar disk

Details Statistical behavior of sunspot groups on the solar disk Statistical behavior of sunspot groups on the solar disk

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002soph..205..361l&link_type=abstract

Solar Physics, v. 205, Issue 2, p. 361-370 (2002).

Physics

12

Scientific paper

In the present study we have produced a diagram of the latitude distribution of sunspot groups from the year 1874 through 1999 and examined statistical characteristics of the mean latitude of sunspot groups. The reliability of the observed data set prior to solar cycle 19 is found quite low as compared with that of the data set observed after cycle 19. A correlation is found between maximum latitude at which first sunspot groups of a new cycle appear and the maximum solar activity of the cycle. It is inferred that solar magnetic activity during the early part of an extended solar cycle may contain some information about the strength of forthcoming solar cycle. A formula is given to describe latitude change of sunspot groups with time during an extended solar cycle. The latitude-migration velocity is found to be largest at the beginning of solar cycle and decreases with time as the cycle progresses with a mean migration velocity of about 1.61° per year.

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