July 26, 2014 Auroras
Grand Rapids, MN
Bz dropped south to as low as -7 nT, and the solar wind picked up speed to nearly 400 km/s, causing the auroras to appear over northern Minnesota. It was nice timing with a new moon. I had gone to bed under skies a little too cloudy for this type of display, but I awoke shortly before 3:00 AM and checked outside. Sure enough, the oval was visible from my front yard, right at treetop level. I hopped in my car and headed for a few spots around town where it was dark enough to shoot.
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| Front Yard shot at 3:00 AM. 70 mm, f2.8, 15 sec, ISO 1600. I changed white balance to tungsten (2850 K) in town to avoid the orange color of the street lighting. |
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| Blandin Beach. |
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| Forest Lake. |
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| McKinney Lake. Back to 5200 K white balance. 24mm, f1.4, 13 seconds, ISO 800. |
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| McKinney Lake, 35mm, f2.8, ISO 1600, 15 sec. |
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| ACE satellite data courtesy of SWPC. |
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