The role of the inner radiation belt dynamic in the generation of auroral-type sporadic E-layers over south American magnetic anomaly

The dynamics of the electron population in Earth’s radiation belts affect upper atmosphere’s ionization level through low-energy Electron Precipitation (EP). impact EP on high-latitude ionosphere has been well explained since 1960’s decade. Conversely, it is still not understood for region South American Magnetic Anomaly (SAMA). In this study, we present results analysis strong geomagnetic storm associated with Interplanetary Coronal Mass Ejection (May 27-28, 2017). atypical auroral sporadic E layers (Es a ) over SAMA are observed concomitance hiss and magnetosonic wave activities inner belt. wave-particle interaction effects have estimated, dynamic mechanisms that caused were investigated. We suggested enhancement pitch angle scattering driven by waves result (?10 keV) into atmosphere SAMA. these precipitations rate at altitude range from 100 to 120 km can generate Es layer peculiar region. contrast, (?1 causes maximum close 150 altitude, contributing occurrence altitudes.