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Here is an image of last night's aurora over N. America as seen from space at 0658 UTC.

The image was taken by the Visible Infrared Imaging Radiometer (VIIRS) instrument onboard the NOAA-20 satellite, using its Day Night Band sensor (DNB).

The VIIRS DNB can image at very low levels of light at night in wavelengths between 0.5 – 0.9 µm (visible and some near-IR).

Most aurora emissions are at 90-150 km, but the reds last night were likely from higher altitudes.

https://cimss.ssec.wisc.edu/satellite-blog/archives/59112
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