Visibility II / V
It was fast as well as short the most durable I have seen. I had just taken a traditional self-portrait + night clouds in 10s of time. I was tapping the backpack on my back when I noticed the green curve. I pressed the trigger and during the delay almost disappeared. There was only a little green in the picture and the horizon twisted. The duration was probably less than a minute. By the way, during the whole night, no greenery was visible in the pictures.
A little green appears in the upper right of the picture;)
The measuring stations showed a spike from 2:00 to 2 October.