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All-Sky Aurora Outburst Series (Aug 30-31, 2024).jpg
This is a series of 20 images recording the onset of a substorm outburst during the Kp5-level aurora display on the night of August 30/31, 2024, shot from home in southern Alberta, Canada.
The images were taken over a span of almost 30 minutes as part of a time-lapse sequence, with 4-second-long frames taken at a cadence of 5 seconds (i.e. a 1s interval between frames), with every 18th image selected for this set, so at an interval of 1m30s seconds apart, to show the change in shape and colour. The exception is the first two frames which are almost 3 minutes apart, as I was setting exposures times and intervals between those frames.
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 Daylight Time.
The field of view is 180° across the circular images, with the camera tipped down toward the north. The zenith is at toward the top of the frames.
The outburst begins with a classic coiled curtain brightening across the north, with folds and ripples. The curtain had been fairly diffuse before this. The northern arcs brighten and expand, then a tall formation sweeps in from the east (right) at about 12:46 am. Aurora then begins to fll the sky, breaking up into pulsating rays and patches converging to the magnetic zenith at top. The aurora largely disappears from the northern horizon.
While the brightest part of the aurora forms did appear green to the eye, the reds were not obvious as such to the naked eye.
Shortly after the end of this time-lapse sequence I switched the camera to shoot a real-time video of the zenith pulsations.
Each still frame was a 4 second exposure at f/2 with the TTArtisan 7.5mm circular fish-eye lens, on the Nikon Z6III at ISO 3200. The first frame was 15 seconds at ISO 1600.
To prospective publishers — Individual images can be supplied to facilitate layout in a different format if desired. The original of this matrix of images is ~
The images were taken over a span of almost 30 minutes as part of a time-lapse sequence, with 4-second-long frames taken at a cadence of 5 seconds (i.e. a 1s interval between frames), with every 18th image selected for this set, so at an interval of 1m30s seconds apart, to show the change in shape and colour. The exception is the first two frames which are almost 3 minutes apart, as I was setting exposures times and intervals between those frames.
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 Daylight Time.
The field of view is 180° across the circular images, with the camera tipped down toward the north. The zenith is at toward the top of the frames.
The outburst begins with a classic coiled curtain brightening across the north, with folds and ripples. The curtain had been fairly diffuse before this. The northern arcs brighten and expand, then a tall formation sweeps in from the east (right) at about 12:46 am. Aurora then begins to fll the sky, breaking up into pulsating rays and patches converging to the magnetic zenith at top. The aurora largely disappears from the northern horizon.
While the brightest part of the aurora forms did appear green to the eye, the reds were not obvious as such to the naked eye.
Shortly after the end of this time-lapse sequence I switched the camera to shoot a real-time video of the zenith pulsations.
Each still frame was a 4 second exposure at f/2 with the TTArtisan 7.5mm circular fish-eye lens, on the Nikon Z6III at ISO 3200. The first frame was 15 seconds at ISO 1600.
To prospective publishers — Individual images can be supplied to facilitate layout in a different format if desired. The original of this matrix of images is ~
- Copyright
- © Alan Dyer/AmazingSky.com
- Image Size
- 20800x20160 / 155.3MB
- www.amazingsky.com
- Contained in galleries
- My Latest, Aurora, Alberta & Saskatchewan Nightscapes
