Beautiful shots! Once about 35 years ago (1980 or 81) the northern lights displayed where I lived, at 42 degrees north. They were the same color of green you show, but were rays pulsing out from a center, and they lasted for at least a half an hour, and then started to fade. It was astonishing. I had no camera, so I spent all my energy in remembering it. Although the northern lights occasionally have shown up here, nothing has ever come close to that display. Lucky you.