Relativistic Electron Precipitation by EMIC Waves: Importance of Nonlinear Resonant Effects

Relativistic electron losses in Earth's radiation belts are usually attributed to resonant scattering by electromagnetic waves. One of the most important wave mode for such is ion cyclotron (EMIC) mode. Within quasi-linear diffusion framework, resonance relativistic electrons with EMIC waves results very fast precipitation atmosphere. However, intensities often exceed threshold nonlinear interaction, and intense have been shown transport away from loss cone due force bunching effect. In this study we investigate if can block precipitation. We combine test particle simulations, low-altitude ELFIN observations EMIC-driven precipitation, ground-based observations. Comparing simulations observations, show that, despite low pitch-angle being transported cone, at higher pitch angles filling