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