There are no cities North of us, but I also am not 100% convinced that any Aurora are at play here. I think it's from resorts on the other side of the lake. Still, it's a nice tone. 16-minute exposure.
August 29, 2014@22:12

K5__3403
963.0 sec at f / 5.6@16 mm
ISO 800
PENTAX K-5
smc PENTAX-DA* 16-50mm F2.8 ED AL [IF] SDM