Journal ArticleNew Insight Into the Transition From a SAR Arc to STEVEGillies, D M; Liang, J; Gallardo‐Lacourt, B; Donovan, EKey Points Detailed analysis of spectral transition of a Stable Auroral Red (SAR) Arc into Strong Thermal Emission Velocity Enhancement (STEVE) emission Ionospheric threshold conditions may be a requirement for the evolution of STEVE Basic parameters of transition features from SAR Arc to STEVE presentedWiley2023-03-2810464428Geophysical Research Letters5060094-8276https://doi.org/10.1029/2022GL1012052025481; 2445467National Science Foundation