Photo from the evening of September 27th, 2011 at Pontoon Lake (approx 30km east of Yellowknife, NWT).
There was no wind - superb for capturing the reflection of the aurora on the the water.
Nikon D700 + Leica 19mm. (Note: EXIF info for lens is not correct)
20 second exposure at ISO 800
More northern lights photos are available here: www.flickr.com/photos/steves_2003/sets/72157625882253359/