NOAA-20 VIIRS Day Night Band over the central United States showing an Aurora, at 0658 UTC 11 May 2024.

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   AkaSci 🛰️ (akasci@fosstodon.org)'s status on Sunday, 12-May-2024 17:45:25 JST AkaSci 🛰️

   in reply to

   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
   24/n