Night of Aurora in Arizona
to 4am in 15 minute increments
Clouds can be seen
rolling in at frame 15, and persisting for an hour or so, each
frame is 15 minutes apart.
is another automated sequence, with the Aurora Cam the next night
after the big November 9th display, while the Kp index was at
5.0 and going down. Started later at 10pm, this sequence shows
the first row is considerably redder than the rest of the images
(frame 22 is the neighbors light) and clearly shows that while
a Kp of 5 is normally not visible as an Auroral glow, it can
be seen when it is coming down from a much higher value, such
as the night
before at 8.
Enlargements from selected frames 0a and 12a for comparison, when the sky was nearly back to normal greyish.
Instrument: 16mm f/2.8 Zenitar Fisheye at f/2.8
Platform: Aurora Cam with Robotic Barndoor
Film: Konica 400
Exposure: 10 mins
Location: Payson, Arizona
Elevation: 5100 ft.
Sky: Seeing 8/10, Transparency 7/10
Outside Temperature: 15 C
Processing: Photoshop CS
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