  Recent results by the Van Allen Probes mission showed that the occurrence of
energetic ion injections inside geosynchronous orbit could be very frequent
throughout the main phase of a geomagnetic storm. Understanding, therefore, the
formation and evolution of energetic particle injections is critical in order
to quantify their effect in the inner magnetosphere. We present a case study of
a substorm event that occurred during a weak storm $\textit{ Dst }$ $\sim$
-40nT on 14 July 2013. Van Allen Probe B, inside geosynchronous orbit, observed
two energetic proton injections within 10min, with different dipolarization
signatures and duration. The first one is a dispersionless, short-timescale
injection pulse accompanied by a sharp dipolarization signature, while the
second one is a dispersed, longer-timescale injection pulse accompanied by a
gradual dipolarization signature. We combined ground magnetometer data from
various stations and in situ particle and magnetic field data from multiple
satellites in the inner magnetosphere and near-Earth plasma sheet to determine
the spatial extent of these injections, their temporal evolution, and their
effects in the inner magnetosphere. Our results indicate that there are
different spatial and temporal scales at which injections can occur in the
inner magnetosphere and depict the necessity of multipoint observations of both
particle and magnetic field data in order to determine these scales.
