Abstract
It was verified that the total number of sunspot groups at certain region on the solar surface for a certain activity cycle can be estimated quite accurately by using the Markov chain approximation method on the total number of spot groups observed on the same region at an earlier activity cycle. Application has been carried out on the observed sunspots on three northern longitude intervals (40‡–50‡, 80‡–90‡, and 130‡–140‡) during the activity cycle 1950–1960 and 1960–1970. The total number of spot groups in these regions for the activity cycle 1960–1970 has been estimated from the observational data of the cycle 1950–1960. A good correlation between the observed and estimated number of spot groups for the activity cycle 1960–1970 has been noted.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Clark, D. M., Yallop, B. D., Richard, S., Emerson, B., and Rudd, P. J.: 1979, Nature 280, 299.
Halaç, O.: 1978, Kantitatif Karar Verme Teknikleri, pp. 149–196.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
önal, M. Estimates of the number of sunspot groups: Application to the activity cycle 1960–1970. Earth Moon Planet 43, 117–121 (1988). https://doi.org/10.1007/BF00056733
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00056733