Abstract The characteristics of X-class flares of solar cycles 23 and 24 are examined based on the soft X-ray (0.1–0.8 nm) and EUV (26–34 nm) light curves. First, the commonly used correction factors for the center-to-limb variation of EUV flux are compared. Subsequently, enhancements in X-ray and EUV levels are used to calculate the relative apportionment of flare energy released in these two bands. The X-ray to EUV proportion of energy is found to be larger in the high X-class flares (X9.0 and stronger) as compared to the flares weaker than X9.0. The X-ray and EUV light curves revealed that the time of impulsive and thermal EUV peaks differed from X-ray peak by 0–25 min. The time differences had a broad range for weaker flares but reduced to within 7 min for high X-class flare events. Therefore, the present study brings out the general energetics and temporal evolution of phases of the X-class flares. Implications of the findings on solar flare studies and flare impact on terrestrial atmosphere are discussed.


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    Titel :

    Characteristics of X-class flares of solar cycles 23 and 24 in X-ray and EUV bands


    Beteiligte:
    Pandey, Kuldeep (Autor:in) / Chakrabarty, D. (Autor:in) / Kumar, A. (Autor:in) / Bhardwaj, Anil (Autor:in) / Biswal, S. (Autor:in) / Hussey, G.C. (Autor:in) / Yadav, A.K. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 71 , 12 ; 5438-5452


    Erscheinungsdatum :

    2023-02-13


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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