When is an aurora not an aurora? Phenomena called 'Steve' and 'picket fence' are masquerading as auroras

The shimmering green, red and purple curtains of the northern and southern lights—the auroras—may be the best-known phenomena lighting up the nighttime sky, but the most mysterious are the mauve and white streaks called Steve and their frequent companion, a glowing green "picket fence."

Sub‐Auroral Green STEVE Arcs – Evidence for Low Energy Excitation

New Insights into the Enigmatic Steve and the Picket Fence Phenomena

Auroras, Spaceweather.com

Time Machine

When Is an Aurora Not an Aurora? Explaining Mysterious Phenomena

Scientists solve 30-year-old aurora borealis mystery

NASA, citizen scientists study the mystery of Steve

What Is STEVE? The Mysterious Purple Auroral Phenomenon Explained

The Mysterious Green Streaks Below STEVE - Semeter - 2020 - AGU