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Ursa Astronomical Association
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taivaanvahti(at)ursa.fi

Ursa Astronomical Association

Half-sky auroras - 14.1.2022 at 23.30 - 15.1.2022 at 01.52 Kouvola Observation number 104001

Visibility IV / V

Tero Sipinen, Ursa (Etelä-Suomi)

The beginning of the Northern Lights show with its dunes had to be experienced only indirectly (some & net's cameras), and it was clear that now if it was worth twisting to see for yourself. Pessimistically, I warned just before 11 p.m. The pessimist was not disappointed. I arrived at the scene at 11:15 p.m. The camera recognized the spots as green, so it wasn’t all over yet. Vice versa.

I climbed to the top of the hill and noticed that the greenery was intensifying and I also separated a clear movement. And no cloud cloud anywhere. I started with a circular fish eye and after a couple of test shots I put 300 images on the counter (3 sec, 1 sec apart). After the shutter was silent, I quickly checked the result and decided to continue recording the timelapse. I just added a second counter in front. Namely, the more active description did not hurt when the fingers froze quickly in a strong wind without gloves, even though it was only a couple of degrees below zero. Sometimes you have to focus on watching and not always flicking the camera. (Seli seli, lazy photographer :)

During the more than 2 hours spent in the wind, the highlights were a red color clearly visible to the naked eye on a couple of occasions. A rare treat for me. As well as the fact that the fires extend well beyond the zenith even in the south. I kept blinking from the sky in all directions in the hope of possible rarities, but I didn’t see them. Also did not stick to the pictures. I saw the vertical streaks that sparked the conversation at the eastern end of the belt, I don't remember the time. I wondered when they resembled the "lamellae" of a belt sometimes seen from below, but were so strange when they were closer to the horizon than the zenith. Too bad they are indistinguishable from a timelapse. Maybe 3 sec was too much for them or else the fisheye projection will make them too small for this image quality.

Great show. The top 3 ranked at least for the fires observed in the south.

Figures 1 and 2 show situations where I saw red (0.25 and 1.08). Animation from 23.34-1.42



More similar observations
Additional information
  • Aurora brightness
    • Bright auroras
  • Observed aurora forms
    • Arc info

      ARC The arcs are wider than the bands and do not fold as strongly. The arcs are normally neither very bright nor active.

      The arc is probably the most common form of aurora. When aurora show is a calm arc in the low northern sky it often doesn’t evolve to anything more during night. In more active shows the arc is often the first form to appear and the last to disappear.

      The lower edge of the arc is usually sharp but the upper edge can gradually blend into the background sky. As activity increases rays and folds normally develop, and the arcs turn gradually into bands.

      An aurora arc runs across the picture. Vertical shapes are rays. Photo by Atacan Ergin.

      Aurora Arc. Photo by Mauri Korpi.

      Aurora Arc. Photo by Anna-Liisa Sarajärvi.

      Aurora Arc. Photo by Matti Asumalahti.

    • Band info

      Bands are usually narrower, more twisty at the bottom, brighter, and more active than arches. Bands usually develop from arches.

      Bands can form J and U shapes, sometimes even full spirals. The corona can also arise from bands. Bands are a fairly common form of aurora.

      Aurora band. Photo by Merja Ruotsalainen.

      Aurora band. Photo by Matias Takala.

      Aurora band. Photo by Lea Rahtu-Korpela.

      Aurora bands. Photo by Lauri Koivuluoma.

      Aurora band. Photo by Matias Takala.

    • Veil info

      Veil
      Veil is the most bland and very common form of aurora. It usually covers its homogeneous dim glow over a wide area of the sky at once. Most often, the veil is seen in the calmer and quiet phase of the night after the aurora maximum as a background for other forms. The veil can also occur alone and in that case it will be quite difficult to reliably identify as an aurora, especially at a observation site which has a lot of light pollution.

      A similar glow of light can also be caused by airborne moisture, smoke, or a very thin layer of clouds that reflects the light that hits them. However, clouds can also be used to identify veil, especially if the middle or upper cloud appears dark against a lighter background, then it is very likely to be aurora veil if the brightness of the background sky is not due to the rising or falling Moon or Sun. When photographing, very long exposure times usually reveal the green colour of the veil auroras.

      Veil and rays. Photo by Esa Palmi.
       

      Red aurora veil. Photo by Marko Mikkilä.

       

      Veil. Photo by Milla Myllymaa.

       

      Aurora veil that changes color from green at the lower edge through purple to blue at the top. Photo by Jaakko Hatanpää.

       

      Dim green veil. Photo by Jarmo Leskinen.

       

      Radial aurora band surrounded by veil. Photo by Jussi Alanenpää.

  • Colors with unaided eye and other features
    • Green auroras info

      Green, seen with the naked eye, is one the most common colors of the aurora. The green color is derived from atomic oxygen.

      Green auroras. Lea Rahtu-Korpela.

      Green auroras. Photo by Juha Ojanperä.

    • Red coloration of the shapes top info

      Auroras which have red top part that can be seen with naked eye are most often observed in the bands and long rays. In this case the lower parts are usually green. If the upper parts are in sunlight, red may be stronger than green. This shade of red is due to the discharge of the excitation state of the atomic oxygen.

      Aurora that shift to reddish towards the top. Photo by Karri Pasanen. 

      Red top in a aurora band. Photo by Simo Aikioniemi.

      Red at the top of the aurora. Picture of Tom Eklund.

Comments: 1 pcs
Mikko Peussa - 20.2.2022 at 15.29 Report this

Melkoinen näytelmä jonka joutui itse seuraamaan pilvien välistä. Hieno setti.

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