Possible Evidence of STEVE in Dynamics Explorer-2 Data

Amateur photographers observed arc-like emissions at sub-auroral latitudes with colors and features that were distinct from typical auroral arcs. These emissions were given the name STEVE which stands for Strong Thermal Emission Velocity Enhancements. These spectacular photographs revealed fascinating and distinct features from more well-known optical features such as Stable Auroral Red (SAR) arcs. Scientific investigations have now documented the characteristics of STEVE to the point that we are now able to review older data sets from polar orbiting satellites such DE-2 and Freja for evidence of STEVE. In this presentation, we present results from the survey from DE-2 and Freja for the possible in-situ observations of STEVE. Examples will be shown of regions of enhanced electron temperatures, low energy electrons flux and the low altitude signature of electromagnetic ion cyclotron waves. Results will presented to explore if DE-2 observations are consistent with STEVE features and if these results have an association with electromagnetic ion cyclotron waves.