On 23 Nov 2006 09:11:45 -0800, "Dave Mitsky" wrote:

While observing from a dark site in central Pennsylvania on Tuesday
night, my observing buddy and I noticed what we first took to be an
auroral glow in the southeast at approximately 6:30 p.m. EST (23:30
UT). It was a green or blue-green amorphous glow with a brighter
central "ray" that slowly expanded and eventually dissipated about 15
minutes later.

I saw that too! I thought I was seeing smoke from a chimney down the
street, as I had observed during daytime that smoke was lying close to
the ground that day, but I had no luck coming up with an explanation
for what was illuminating it. It looked like a searchlight shining
into a smoke cloud. Like you, I was struck by the resemblance to an
aurora. I ran into some trouble later in the night and so forgot
about it until you mentioned it. Evidently it wasn't a ground-level
phenomenon at all. I'm in Montgomery, Lycoming County, south of
Williamsport.