Evolution of density structures in the inner magnetosphere using coordinated Van Allen probe observations

The plasmasphere contains rich small-scale structure that plays a key role in regulating wave propagation and mass transport in the inner magnetosphere, yet the evolution of plasmaspheric density ducts remains poorly understood. We use joint observations from the Van Allen Probes to investigate how density structures change over time by identifying matched structures observed by both spacecraft during the years 2013 and 2014. For each structure, we quantify changes in density, width, and locatio