 | Wow. Northern Lights in North Iowa. A rare occurrence to be sure. Taken about 10:30 pm on June 22. The purple streaks were pulsing nearly overhead. I follow several Aurora forecast web sites including spaceweatherlive.com, f5data.net, softservenews.com and the active Facebook group Great Lakes Aurora Hunters. One of the measures of Aurora strength is the Kp index. In North Iowa it generally needs to be at least 7 or higher to see the Northern Lights. Tonight there was a Kp of 8. 24mm lens on a full-frame camera, ISO 800, f/5.0, 25 sec. Click the image to see larger. |
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