Abstract Approximately 180 major X-ray flares that occurred between September 1977 and May 1984 have been examined to determine some of the outstanding trends and collective properties that characterize this set of large events. This study concentrates only on the distribution of the maximum emission measure and the distribution of maximum electron temperature with respect to the maximum radiative flux in soft X-rays generated by the flare. Two unusual, but apparently related, phenomena appear to be revealed by these empirical relationships. The first of these is a linear dependence of the lower limit of the log emission measure with respect to the maximum flare X-ray flux. The second is the presence of two events arising from the same active region that prove the exception to the rule. One of these special events produced a thermal temperature of 60 MK.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The empirical relationship of peak emission measure and temperature to peak flare X-ray flux during solar cycle 21


    Contributors:

    Published in:

    Advances in Space Research ; 8 , 11 ; 157-160


    Publication date :

    1989-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    CME–flare association during the 23rd solar cycle

    Mahrous, A. | Online Contents | 2009


    Preliminary forecast for the peak of solar activity cycle 24

    Ahluwalia, H.S. / Ygbuhay, R.C. | Elsevier | 2009


    CME–flare association during the 23rd solar cycle

    Mahrous, A. / Shaltout, M. / Beheary, M.M. et al. | Elsevier | 2009


    Low latitude ionospheric TEC response to the solar flares during the peak of solar cycle 24

    Saharan, Suniti / Maurya, Ajeet K. / Dube, A. et al. | Elsevier | 2023