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The prediction of the magnitude of sunspot maxima for Cycle 22 using abnormal quiet days in Sq(H)
Author(s) -
Butcher E. C.
Publication year - 1990
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl017i002p00117
Subject(s) - sunspot , quiet , maxima , magnitude (astronomy) , sunspot number , physics , solar cycle , solar minimum , value (mathematics) , astrophysics , solar maximum , atmospheric sciences , mean value , mathematics , meteorology , environmental science , statistics , astronomy , magnetic field , solar wind , quantum mechanics , art , performance art , art history
Analysis of abnormal quiet days (or AQDs) in Sq(H) near years of sunspot minimum have successfully been used to predict the maximum annual mean sunspot number Ra‐max at the following sunspot maximum. In this paper, the method is used for cycle 22 and predicts a value of Ra‐max of 187 ± 36 and a value of the maximum monthly value of R of 254 ± 49.