Aurora Outburst Sequence
Taken by Alan Dyer on August 11, 2024 @
Grasslands National Park, Saskatchewan
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Camera Used: NIKON CORPORATION NIKON Z6_3
Exposure Time: 2/1
Aperture: f/2.8
ISO: 6400
Date Taken: 2024:08:18 16:02:25
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Details:
This is a series of 20 images recording a substorm outburst during the great aurora display on the night of August 11/12, 2024, shot from Grasslands National Park, in southwest Saskatchewan.
The images were taken over a span of 13 minutes as part of a time-lapse sequence, with 2-second-long frames taken at a cadence of 3 seconds (i.e. a 1s interval between frames), with every 14th image selected for this set, so at an interval of 42 seconds apart, to show the rapid change in shape and colour.
Like a printed page, time runs from left to right across each row, then down to the later row below. So from top left to bottom right. Times are Mountain Standard Time (Saskatchewan does not observe Daylight Saving Time).
The substorm began with intense reds sweeping in from the east then engulfing the sky. The field of view is 130° wide and in height extends over 90° up past the zenith where the curtains are converging in a coronal display. The greens show a range of tints indicating more than just oxygen lines glowing, with likely hydrogen-beta proton aurora emission lines as well. And the red and greens mix to produce oranges and yellows.
Each frame was a 2-second exposure with the Laowa/Venus Optics 10mm rectilinear lens wide open at f/2.8, on the Nikon Z6III at ISO 6400.
Photographer's website:
https://amazingsky.com
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