Great shot. I took this in Atlanta, GA about 10pm EST. The sky definitely had a very slight pink / purple hue you could see with the naked eye. Northern lights or some sort of lens flare?
Here is the exif data from the original, and I set it to 10 second exposure; I don’t know why it say 2.0s, I don’t understand the technicality and am an amateur at best.
The one I uploaded is lower resolution because I wanted to protect my information and thought I may put up the original for sell one day. A bit greedy I know but my poverty is 2 meals a day walking on subfloors that give me splinters. Enjoy the data.