Anyone located in the northern lattitudes should be on watch tonight..
There is supposed to be a pretty good show of Aurora Borealis (northern lights)....
I took these pictures last saturday night/sunday morning... It was quite the site, i could see my shadow from the lights.... Anyone interested, its definitely worth a peek outside to see them!
More:
http://www.tomschindler.net/auroras
If you're even more curious...
www.spaceweather.com has a wealth of information about this topic!
Best of luck if you look tonight...
Tom