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Figure 17


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Solar electron fluxes associated with impulsive (upper dashed line) and gradual (dotted line) SEP events (Grimani et al., 2009a). The continuous line, the dot-dashed line and the bottom dashed line, represent minimum and maximum interplanetary and galactic electron fluxes observed during a negative polarity period (A < 0) of the GSMF (when the solar magnetic field lines enter the North pole of the Sun) during which the flux of negative particles is maximum with respect to periods of positive GSMF polarity and similar conditions of solar activity (Grimani et al., 2009a). The vertical continuous line indicates the maximum electron energy measured by the NGRM. It can be observed that below 7 MeV the solar electron flux is overcome by several orders of magnitude of the interplanetary and galactic components allowing for SEP event forecasting.

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