The automatic NLC camera at Athabasca, Canada, recorded some stunning images of bright (4) NLC with strong aurora. Well worth a look on the nlcnet.co.uk homepage with links to higher resolution images on the running list at www.nlcnet.co.uk/nlcreps.htm.
Gorgeous pics, yep, but *my* highlight of the season so far has to be something that happened last night whilst I was up at Kendal Castle waiting to see if another display was going to kick off. I'd been stood there half an hour, in the darkness and silence, absolutely no-one around, when I felt something go into the back of my foot. Nearly jumped out of my skin! When I looked down I saw I'd been visited by a friendly neighbourhood hedgehog...
Very good! The interesting question is: what happened over time to the NLC? Historical reports of NLC and aurora together reach various uncertain conclusions. Aurorae are said to dissipate NLC quite quickly, then again that they have no influence, or even that they intensify NLC.
Did the observers note what happened before, during and after the aurora? That would be a very interesting and useful report!
It's something that seems to need lots of more research.