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The aurora is a beautiful night sky optical phenomenon that is readily seen at high-latitude locations, but with more effort can also be seen and enjoyed at mid-latitude locations. Guidelines for when and where to look are presented, along with a rich array of photographic examples of mid-latitude auroras exhibiting all the usual range of green, red, and purple colors.
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Joseph A. Shaw, "Observing the mid-latitude aurora," Proc. SPIE 11099, Light in Nature VII, 1109906 (30 August 2019); https://doi.org/10.1117/12.2531275