The movement was basically imperceptible to me. I would look to the north and all seemed static. Then I would look away and look back a minute later and I could tell it had changed. I used the same comparison to the clouds as you did when trying to describe it to my wife. If you watch the video (linked in the original post) that movement represents about 10 minutes worth of footage. To the naked eye the aurora looked gray, with maybe the tiniest hint of green as my eyes adjusted to the dark (imagined?). With even a few seconds of exposure on the camera, though, the green was obvious. The aurora looked to me like sky glow from a large city just to the north, beyond visual range. Of course where I was there was no large city to the north! It was truly stunning. So much so that even the moon, Jupiter and Venus showed up to watch. Dion ________________________________ From: Ian Glenn <root.ibg@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Thursday, August 2, 2012 12:30 PM Subject: Re: [Utah-astronomy] Aurora + conjunction: Jul 16 Beautiful shots! It must have been amazing to see! Having never seen the aurora myself, I continue to wonder how fast their movement can be. I know it can vary from display to display. Were you able to detect their movement with your eyes directly, or only over some time? Is it similar to the way one can often tell cumulus clouds are moving slowly but it is just at the edge of visual detection? On Mon, Jul 30, 2012 at 4:12 PM, Chuck Hards <chuck.hards@gmail.com> wrote:
Great shot, Dion. That's a typical "Utah" Aurora, as I remember from the '70's and early '90's. Good catch!
Somewhere I have similar shots (emulsion) from Big Mountain and Little Mountain. Ah, the memories.
Still waiting for another "Pink Floyd" show like we got some years ago right here in northern Utah. Hope it's not a once in a lifetime display from contiguous latitudes. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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