May 20, 2017 Auroras
Chippewa National Forest
A high speed stream of solar wind swept past Earth, bringing auroras to northern Minnesota and southern Canada. I headed north into the Chippewa National Forest to take some pictures.
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| Main auroral band over the northern horizon plus a band of auroral "spikes" higher in the sky (not sure what these really are). |
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| Multicolored auroras return a few minutes later. |
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| Closer to midnight, a brighter substorm develops. |
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| VIIRS satellite imagery showing another substorm I missed at 3:00 AM due to cloudy skies (I went to bed). |