Several Small Proton Events in Years 1990-1991 by Data of the GRANAT Satellite

This work considers four sets of isolated enhancements of solar cosmic ray (SCR) intensity, which are characterized by short duration (less than 6 days) and relatively small amplitude of flux variation (less than three orders of magnitude above background). These events were not caused by powerful solar flares, and during them large disturbances of the interplanetary medium associated with Forbush decreases and the geomagnetic activity were not observed. Eight events of this type were observed during the period of 1990-1991. Four of them, considered in this paper, have the most complex time profiles of cosmic ray intensity. They will be considered not in chronological order, but in the order of complication of their time profiles. The observed features of time profiles of SCR intensity can be explained by using the reflection model of SCR propagation.