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Fig. 8.

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Mean values of the proton peak fluxes (in pfu) at several integral energies (E > 10; >30; >60 and >100 MeV) and their respective standard deviation of the mean, as a function of the mean SXR peak flux (in W/m2) for the solar flares associated with SEP events in the SEP part of the database. Each integral energy is color coded as follows: E > 10 MeV with red, E > 30 MeV with blue, E > 60 MeV with orange and E > 100 MeV with magenta color. The class of the solar flares is indicated at the top part of the figure, labelled as C, M, X and X10. The dashed vertical black line indicates the lower limit of the X-class flares.

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