pure and applied geophysics

, Volume 63, Issue 1, pp 205–210 | Cite as

An attempt to the explanation and to the prediction of the eleven-year cycle of solar activity

Preliminary communication
  • T. Németh


According to the author the reason of the subsistence of the 11 years' sunspot cycle is to be found in the conjunction of the planets. As a result of the investigations it has been stated that from among the nine planets the joint tidal effect of Venus-Jupiter-Earth is a decisive factor in the variations of sunspot activity. The above three planets are every 10.4 years and 12.0 years respectively, in a close conjunction. The mean value (11.2 years) is in an almost full accordance with the average cycle-period. The fluctuations of the period of the cycle come from the fact that the planets' getting into approximately one line takes a different time within each cycle. This time delay is the cause of the stronger or weaker sunspot activity, and of the shorter or longer cycles.


Time Delay Solar Activity Decisive Factor Tidal Effect Sunspot Cycle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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    R. Wolf, Astr. Mitt.9 (Zürich 1859).Google Scholar
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    H. H. Clayton,Solar Relations (Canton 1943).Google Scholar
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    C. N. Anderson,Notes on the sunspot cycle, J. Geoph. Res.59 (1954).Google Scholar
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    D. Schove,The sunspot cycle, 649 BC to AD 2000, J. Geoph. Res.60 (1955).Google Scholar

Copyright information

© Birkhäuser Verlag 1966

Authors and Affiliations

  • T. Németh
    • 1
  1. 1.Hungarian Meteorological InstituteBudapest II

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