Apr 232012
Looking off to the north tonight:
The green glow on the northern horizon would seem to be due to the emissions of high altitude ionized oxygen. That didn’t last too long, though; the green glow faded and was replaced with a fainter pinkish glow due to nitrogen emissions.
Also: a small cloud passed over the quarry, and was lit up by the powerful lights. As it did so, it became surprisingly colorful. Also visible are a whole mess of satellites.
FYI: at the end of the session, the “current auroral oval” from Spaceweather.com looked like this:
