Survey of Particle Injections Into the Inner Magnetosphere

Energetic particle injections associated with dipolarizations have been seen for many years in the magnetotail and at geosynchronous orbit. Van Allen Probes observes similar signatures in the inner magnetosphere. An automated analysis identifies ion intensity increases in the inner magnetosphere in Van Allen Probes RBSPICE observations. The algorithm looks for increases in intensity by a factor of 3 over 3 minutes. Preliminary analyses indicate that these criteria perform well in selecting events that are interpreted as injections by eye. The search is made independently over 9 ion energy channels from 67 to 398 keV. These increases are identified as either injections or boundary crossings. These signatures are classified by several characteristics including: degree of energy dispersion, change in magnetic field tilt angle, intensity increase factor, number of affected energy channels and peak energy. The spatial distributions and relationships to activity of these ion signatures are presented.