Statistical Comparison of Electron Loss and Enhancement in the Outer Radiation Belt During Storms

The near-relativistic electron population in the outer Van Allen radiation belt is highly dynamic and strongly coupled to geomagnetic activity such as storms substorms, which are driven by interaction of magnetosphere with solar wind. energy, content, spatial extent electrons can vary on timescales hours days, dictated continuously evolving influence acceleration loss processes. While net changes directly observable, relative different processes far from fully understood. Using a continuous 12 year data set Proton Electron Telescope board Solar Anomalous Magnetospheric Particle Explorer, we statistically compare variations trapped those bounce cone (BLC). Our results show that there proportional increase flux entering BLC outside plasmapause during storm main phase early recovery phase. Loss enhancement sustained dawnside throughout while duskside enhanced around minimum Sym-H quickly diminishes. Spatial also examined relation activity, making comparisons possible causal wave modes whistler-mode chorus plasmaspheric hiss.