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Ursa Astronomical Association
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Ursa Astronomical Association

All-sky aurora - 14.11.2012 at 06.30 - 14.11.2012 at 23.00 Inari Observation number 9053

Visibility V / V

The autumn holiday in Inari (Sevettijärventie 4272) had handsome northern lights on 13-15 November 2012. They were so bright that they were visible from time to time through the clouds and still at six in the morning. The sky ranged from partly cloudy to cloudless. I used a Pentax Astrotracer to help and extended the shutter speed to 60 seconds, at which point red and purple came out well, complementing the green.
I took pictures on three evenings and mornings, here are the four best: Jupiter and Venus decorated with northern lights, a North American-shaped repo, and a small cottage under northern lights.

More similar observations
Additional information
  • Aurora brightness
    • Very bright auroras
  • Colors with unaided eye and other features
    • Flaming auroras info

      Flaming. This rare subclass of aurora does not mean so much a single shape, but a large area in the sky. In the flaming aurora, bright waves that are sweeping upward towards the magnetic zenith emerge in the sky. Very rarely waves can wipe downwards. Bands are usually reported during flaming, less often spots.

    • Blue auroras info

      Clearly blue auroras can be seen only during the best aurora displays close to the maximum phase or soon after it. Sometimes blue auroras can be seen shortly after the sunset at the top part of the auroral shapes, specially rays. It is created by the mission of the ionized nitrogen molecules created by the suns radiation.

      Strongly colored blue auroras. Photo by Jorma Mäntylä.

      Blue top parts of the aurora. Image by Tom Eklund. 

      Blue top parts of the aurora. Image by Jaakko Hatanpää.

      Partly blue corona. Photo by Tapio Koski.

      Faintly blue top parts of an aurora veil. Photo by Jaakko Hatanpää.

    • Red coloration of the shapes lower edge info

      Red lower edge visible with the naked eye. The bands which are starting to level up their activity and are green colored have quite often a narrow red lower edge. This is the most common form of red color which is derived from molecular nitrogen.

      Aurora band with purple lower edge. Photo by Ilmo Kemppainen.

      The low hanging brightest aurora band is colored red at the lower edge. Photo by Tero Ohranen.

      Narrow purple reddish tones at the lower part of this aurora band. Photo by Merja Ruotsalainen.

      Purple band at the bottom. Photo by Panu Lahtinen.

    • 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.

  • Observed aurora forms
    • Corona info

      CoronaA corona is a hand fan shaped structure, it usually forms south of the observer's zenith, most commonly consisting of rays or bands. The corona is usually the most beautiful part of the aurora show. It is bright and active, but on the other hand also short-lived.

      Aurora corona. Photo by Anna-Liisa Sarajärvi.

      Aurora corona. Photo by Merja Ruotsalainen.

      Corona formed from bands. Photo by Markku Ruonala.

      Aurora corona. Photo by Tapio Koski.

    • Rays info

      The raysare parallel to the lines of force of the magnetic field, i.e. quite vertical, usually less than one degree thick light streaks. The rays can occur alone or in connection with other shapes, mainly with arcs and bands. Short rays are usually brightest at the bottom but dim quickly. The longest rays, even extending almost from the horizon to the zenith, are usually uniformly bright and quite calm, and unlike the shorter rays, most often occur in groups of a few rays or alone. Rays, like bands, are a very typical form of aurora.

      Artificial light pillars, which are a halo phenomenon visible in ice mist, can sometimes be very similar to the rays of aurora. Confusion is possible especially when the lamps that cause the artificial light pillars are far away and not visible behind buildings or the forest. The nature of the phenomenon is clear at least from the photographs.

      Rays. Picture of Tom Eklund.

      Rays. Photo by Mika Puurula.

      Two beams rise from the aurora veil. Photo by Anssi Mäntylä.

      Two radial bands. Show Jani Lauanne.

      Radial band and veil. Photo by Jussi Alanenpää.

      Two rays. Photo by Aki Taavitsainen.

      It may be possible to confuse such rays with artificial light columns. Compare the image below. Picture of Tom Eklund.

      There is no aurora in this image, but all the light poles - including the wide and diffuse bar seen at the top left - are artificial light pillars born of ice mist. Photo by Sami Jumppanen.

      Aurora and artificial light pillars. All the radial shapes in the picture above are probably artificial light pillars that coincide appropriately with the aurora band. In the image below, the aurora band has shifted and does not overlap with the pillars produced by the orange bulbs. There is no orange in auroras. Photo by Katariina Roiha

    • 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.

    • 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.

    • Veil info

      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.

Technical information

Pentax Kr 14 / 2.8 60 s ISO 1600 + oGps Astrotracer.

Comments: 13 pcs
Marja Wallin - 19.11.2012 at 17.49 Report this

No huh kun komeat. Koiko väripaletti kyllä ollut käytössä tuossa näytelmässä. Upeaa.

Matias Takala - 19.11.2012 at 18.12 Report this

Mielettömät värit tuossa ensimmäisessä ruudussa, täytyy toivoa että pääsisi itsekin todistamaan jotain vastaavaa vielä tämän maksimin aikana.

Karri Pasanen - 19.11.2012 at 21.43 Report this

Järjettömän upeat värit! Ei voi kuin ihmetellä ja ihastella... ja samalla todeta, että pohjoiseen on joskus lähdettävä ihan vaan kuvaamaan reposia.

Jari Luomanen - 19.11.2012 at 22.07 Report this

Upeita kuvia Jormalla! Taitaapa olla varsin näppärä tuo Pentaxin systeemi.

Jorma Mäntylä - 19.11.2012 at 22.52 Report this

Matias ja Karri: kuvien värejä ei ole peukaloitu Photoshopissa. Värit ovat suoraan modaamattomasta digijärkkäristä. Valotusajan pidentäminen toi punaisen sekä yllättävän kirkkaasti sinisen-pinkin värin esiin. Paljain silmin samaan aikaan näkyi vihreää, valkoista ja hiukan punaista revontulta. Sininen-pinkki ei näkynyt paljain silmin, vaikka kuvasin repoja joka kerta yli tunnin ja silmät adaptoituivat hyvin pimeään.

Mikko Peussa - 19.11.2012 at 23.08 Report this

Komea on värimaailma. Tuon olen itsekin havainnut, että silloin kun punertavia ja violetteja sävyjä on mukana niin pidemmällä valotuksella ne piirtyy hienosti kuviin, vaikka visuaalisesti näkyisi vain vihreät sävyt.

Karri Pasanen - 20.11.2012 at 08.34 Report this

Niin ajattelinkin, että värit ovat aitoja, sellaisina kuin ovat tallentuneet kennolle.

Sain omaan kameraani kaukosäätimen hiljattain joka mahdollistaa pitkien valotusaikojen käytön ilamn kameran heiluttelua ja vaikka seurantaa ei olekaan niin sopivien reposten aikaan täytyy ehdottomasti testata tuollaista minuutin valotusaikaa. Vaatii tietysti aika pimeän ympäristön.  

Matias Takala - 20.11.2012 at 12.39 Report this

@Jorma: Tiesin, että värit ovat sellaisia kuin ovat kamerasta ulos tulleet. Ks. yönä taivaalla oli koko revontulien väripaletti käytössä, hienoa vaan kun olet saanut talennettua ne meille muillekin katsottavaksi.

Juha Ojanperä - 21.11.2012 at 21.34 Report this

Voi taivahan talikynttilät mitkä värit noissa reposissa! :O


Marko Pekkola - 22.11.2012 at 16.53 Report this

Dynaamisen, veikeän näköinen tuo vihreä kaari kolmannessa kuvassa.

Juha Kinnunen - 23.11.2012 at 22.40 Report this

Onpa mojovat sävyt! Mikä valkotasapaino-/värilämpötila-asetus oli kamerassa valittuna?

Jorma Mäntylä - 24.11.2012 at 01.41 Report this

@Valkotasapaino oli manuaalisesti valittu päivänvalo. Kuten aina, kun kuvaan.

Jorma Mäntylä - 24.11.2012 at 01.53 Report this

Kameran tarkat exif-tiedot ovat täällä:

Jostain syystä tuonne eivät ole tallentuneet koordinaatit, mutta ne näkyvät Astrotracerin tallentamana kamerasta: 69.13,807  27.52,408.

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