Aurora Borealis made a return appearance to the northern United States early in the morning on 12 August. Imagery above from the VIIRS Imagery Viewer, which viewer repackages Direct Broadcast imagery processed at CIMSS with CSPP software, shows the aurora over the eastern USA at 0704 UTC o 12 August as captured by NOAA-21. The image below shows the Aurora at 0843 UTC on 12 August — on NOAA-21’s next pass over the USA. The character of the Aurora has certainly changed in the 90+ minutes!

The Aurora was also present on 13 August, but it did not extend quite so far to the south, being more restricted to northern Canada, as shown below.

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