On the evening of March 23, NOAA predicted increased auroral activity in the auroral ring over Greenland and Canada. This activity was expected to affect Minnesota at a lower intensity. The aurora was clearly visible to the naked eye even from light-polluted Rochester. One could even suspect that the streaks and clouds had some color tint. The color stands out quite clearly in photographs taken with a digital camera with a few seconds exposure. The images were taken with a Canon EOS Rebel T6 camera with an EF-S 24mm 1:2.8 STM lens, ISO 400, 10 seconds exposure. The first experimental exposures ISO 3200 30s and 10s were too bright.
What is really interesting is the sudden colour change as seen in the overview of a few images below. You can see the change in colour tone not only of the curtains and other bright parts, but also of the whole background of this part of the sky.
Update: Sunday April 23rd evening from access road to the Root River Park