AbstractWe perform a power spectrum analysis of the occurrence of sudden storm commencements for solar cycles 11 to 22. Studying in particular peaks longer than the 11 years solar cycle, we found a significant periodicity at around 20 to 30 years, which seems to be unstable. Similar three-cycle unstable peaks are observed in other solar and geomagnetic phenomena such as sunspots, auroral occurrence and the Ap index. The origin of such a periodicity in the occurrence of storm commencements is unknown at present. Due to its unstable behaviour it is not possible to predict when it will appear in the SSCs data.
Spectral analysis results for sudden storm commencements 1868–1996
Advances in Space Research ; 31 , 4 ; 1075-1079
01.01.2002
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Spectral analysis results for sudden storm commencements 1868-1996
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