Steve e auroras?

https://motherboard.vice.com/en_us/article/8xb3xb/steve-is-a-radiant-purple-sky-ribbon-that-defies-explanation

Citando:
"Led by Bea Gallardo-Lacourt, a space scientist at the University of Calgary, the new study focuses on a Steve sighting that occurred on March 28, 2008. This appearance was fortuitously chronicled by the ground-based component of NASA’s THEMIS mission (called All‐Sky Imagers), as well as NOAA’s Polar Orbiting Environmental Satellite (NOAA-17), which was overhead as Steve shone"(...)"Light from auroras is caused by particle precipitation, which occurs when high-energy charged particles cascade into the upper atmosphere along Earth’s magnetic field lines. No such high-energy precipitation was observed from the 2008 event. While there was an observed flux of lower-energy particles, that does not explain the vibrancy of Steve’s luminosity and color. By combing through data captured from above and below the purple and green ribbon, the authors concluded that the “skyglow could be generated by a new and fundamentally different mechanism in the ionosphere.”"