A substorm which occurred on April 24,1979 was the subject of the CDAW 7 workshop and several in-depth studies of ISEE and ground-based data. In this paper we continue the analysis by looking in detail at geosynchronous energetic particle data from the Los Alamos charged particle analyzer instruments. Observations show three distinct injection events during this substorm. We have used a drift shell tracing technique to determine the time and location on the geosynchronous drift shell of each injection region. We then compare the timing of events on the ground, in the tail and at geosynchronous orbit. The first injection is very closely associated with observations from ISEE and ground-based measurements which have been interpreted as the signatures of plasmoid formation in the near-Earth tail. The later two injections occurred while ISEE 1 and 2 were in the lobes following the exit of the plasmoid downtail. All three injections are calculated to have originated in the same local time sector in which the ISEE spacecraft were located and also to have overlapped one another in local time extent. These observations show that the spatial and temporal evolution of the substorm is more dynamic than previous studies have implied. We have considered possible interpretations of the line model and the inner magnetospheric current disruption model. Either model can provide an interpretation of the data but neither by itself, provides a completely satisfactory explanation. We suggest a new synthesis of these two models which provides a simple interpretation for all the observations. We propose that reconnection in the tail initiates the substorm but diverts much of the cross-tail current around the reconnection region enhancing the near-Earth cross-tail current. This creates an unstable situation and current disruptions dipolarize the field in three steps creating the three injections. ¿ American Geophysical Union 1992