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A combination of many Solar energetic particle (SEP) events, each one ofwhich is associated with a single eruption, can create one complexintensity-time profile, that will result in masking the observation of thefirst injected particles detected near Earth for each participated eruption. Wedefined such SEP events as Multi Eruption Solar Energetic Particle (MESEP)events. We have investigated the intensity-time profile of 333 solar energeticparticle events during the operation time of SOHO mission and studied theassociative solar eruptions (CMEs and solar flare) from the starting time ofeach event till the end. We found that most of the events have multi eruptionphenomena which might or might not affect the intensity-time profile. We foundthat it is possible to know the real effect of some of the eruptions during thewhole duration of the event, even if their effect as masked by the firsteruption, by studying the widest possible energy range, the $^4He/P$ ratio andthe anisotropy.

Multi Eruption Solar Energetic Particle Events Observed with SOHO/ERNE