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Bright! Aurora visible now
5:20 12 July 2003 UT:
A bright aurora is going strong in the northern sky as visible from Montana. The bright moon in the southern sky isn't putting out enough light to cause much harm to the auroral fireworks! I just stepped outside after typing the above paragraph. The auroral activity is currently extending upward from the north, through my zenith and a bit beyond. A lot of structure is visible as well as some rapid motions from time to time. This would be quite a show without moonlight. Even with the moonlight it's a pretty good show! Bill Greer |
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Bright! Aurora visible now
On Fri, 11 Jul 2003 23:31:01 -0600, Bill Greer ...reflected:
5:20 12 July 2003 UT: A bright aurora... Thank goodness I live in the South. Alan |
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Bright! Aurora visible now
On Sat, 12 Jul 2003 01:36:59 -0500, Alan W. Craft
wrote: On Fri, 11 Jul 2003 23:31:01 -0600, Bill Greer ...reflected: 5:20 12 July 2003 UT: A bright aurora... Thank goodness I live in the South. Alan It's nice to see aurora sometimes. I remember one time it started directly overhead and spead spikes downward. It looked like an umbrella illuminated from the inside. But it does screw up deepsky observing sometimes. -Rich |
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Bright! Aurora visible now
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Bright! Aurora visible now
wrote in message
... I remember one time it started directly overhead and spead spikes downward. It looked like an umbrella illuminated from the inside. -Rich That's called a "corona" when the center of the action is almost directly overhead. That's exactly what I saw last night from Winnipeg, Manitoba (latitute 50N)! Not the first time I've seen one, but last night's display produced the most violent substorms I've ever seen. I saw two substorms, there may have been more earlier and later (I was out between 4:30 and 5:30 UT). Everything was moving so fast! If it weren't for the moon (but that was sitting pretty low from up here - could have been worse), it would have looked absolutely frightening! Brion Dolenko |
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