Effects of chorus wave obliquity on radiation belt electron energization: dependence on geomagnetic activity

A precise knowledge of the variations of both the obliquity and intensity of lower-band chorus waves as functions of latitude and geomagnetic activity would pave the way for more accurate modelling of the dynamics of radiation belt electrons in full diffusion codes. We make use of recent statistics obtained by CLUSTER to demonstrate that the intensity and obliquity of chorus waves vary significantly with the level of geomagnetic activity, with important implications for future simulations of storm-time electron acceleration and loss.