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Q&A: Another Wisconsin Aurora

1 Jun 2015, 07:01 UTC
Q&A: Another Wisconsin Aurora
(200 words excerpt, click title or image to see full post)

Question: The Northern Lights are continuing their show! I sent you a photo that you used in your April 6 post, and learned several things about aurorae from your explanation. So I kept my camera ready and waited for the next one to appear, hoping for a better photo. My first photo was just a little out of focus. This one I nailed. But now I’m curious why this time it was just a green glow? Last time there was also some yellows and reds, and it looked more like a “curtain” blowing in the wind. Can you explain why the two looked so different? — JW, Three Lakes, WI
Answer: Thanks for another beautiful photo, Jennifer, and for sharing it here on Sky Lights. Very sharp focus this time, judging from the pinpoint stars and details on the trees. Click on that image to open a larger version in a new tab.
Here’s the EXIF data: Canon 60D + Tamron 18-50 mm lens, ISO 1000, f/2.8, t = 20 s.
When I responded to your question back in April, I was focused more on explaining why you were seeing so many aurorae this season, and how the “curtain” ...

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