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After 8 p.m. I parked on 65th Street, walked to the field and took pictures of the aurora from my tripod. Suddenly I noticed a bright, almost vertical band to the west. I began to wonder what it was. For a few moments I thought it might be the tail of the now set comet A3, which has suddenly become very bright and only the tail is visible. However, it was obvious that it was not a comet, rather it was related to the aurora.
It was probably a phenomenon called STEVE (Strong Thermal Emission Velocity Enhancement), see https://en.wikipedia.org/wiki/STEVE.
2024-10-10_20:22:49 CDT, Canon EOS T6, 18mm, f3.5, ISO3200, 4 s
The constellation of the Corona Borealis is at the top center. More to the right is the constellation of the Boötes behind the pink aurora, the bright star Arcturus is lower in the center. On the upper right are the two stars of the handle of the Big Dipper.