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.


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    Titel :

    Spectral analysis results for sudden storm commencements 1868–1996


    Beteiligte:
    Mendoza, B. (Autor:in) / Valdes-Galicia, J.F. (Autor:in) / Maravilla, D. (Autor:in) / Lara, A. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 31 , 4 ; 1075-1079


    Erscheinungsdatum :

    01.01.2002


    Format / Umfang :

    5 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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