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2017_09_08_Aurora (ex CME AR12673 X-class 9.3) 2 | by john.purvis
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2017_09_08_Aurora (ex CME AR12673 X-class 9.3) 2

Fighting cloud and a full Moon tonight so pleased to catch this. Arc to 10 degrees with some faint ray activity to the right.

 

This is from the amazing X-class flare and CME produced by AR 12673 which was just a very unimpressive unipolar group last Saturday when I imaged it but it grew rapidly in size and complexity.

 

Samyang 24mm f/1.4 @ f/2

 

Aurora stats!

 

University of Lancaster magnetometer 309.7 nT deviation from mean.

Bt = 32.9

Bz = -29.5

 

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Taken on September 8, 2017