The onsets of closely consecutive homologous flares (CCHF), which are separated by less than 6 hours and most often by about 1 hour, are compared with that of isolated flares (no flare in the region half a day before). Isolated flares appear to be formed of two components, a surging arch and a flaring arch, while a set of CCHF may be composed of consecutive elementary flares or of a series of complex ones. It is shown that the onset of eruptive flare phenomena is not the same for an isolated event and for a member of CCHF (excluding the first) as found in H-alpha and EUV observations, and probably in X-ray observations also. It is suggested that a CCHF set would become a single flare with episodic enhancement of brightness by taking account of the common H-alpha behavior of surging and flaring arches as well as the EUV emission.


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    Title :

    About the onsets of closely-consecutive homologous flares


    Contributors:
    Martres, M. J. (author) / Mein, N. (author) / Mein, P. (author) / Mouradian, Z. (author) / Rayrole, J. (author) / Schmieder, B. (author) / Simon, G. (author) / Soru-Escaut, I. (author) / Woodgate, B. (author) / Strong, K. (author)

    Publication date :

    1982-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


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