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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

All-sky aurora - 14.12.2015 at 19.50 - 14.12.2015 at 23.50 Oulu, Oulunsalo Observation number 46354

Visibility V / V

Immediately in the early evening (around 6pm) the northern lights were visible from home. I packed the cranks and was at the scene around 7:50 p.m. There were already northern lights visible everywhere. Twenty minutes after that came a strong ‘wave’ with a crown where red was also visible in the eyes. At 9pm started to fade and I changed seats. After that, there was no more belt and ‘green mist’ in the sky. I drove home at 11.30pm and stopped once more when I just came back rel. strong belt. Sweet evening after such a long cloud break :)

More similar observations
Additional information
  • Aurora brightness
    • Bright auroras
  • Colors with unaided eye and other features
    • 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.

    • 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
    • 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.

    • 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.

Comments: 11 pcs
Maria Akolahti - 19.12.2015 at 00.30 Report this

Huikeita kuvia!

Mikko Lönnberg - 19.12.2015 at 09.22 Report this

On upeita kuvia ja varsinkin ensimmäinen todella hieno.

Tommi Ropponen - 19.12.2015 at 11.11 Report this

Ensimmäinen kuva on ihan käsittämättömän hieno. Loistava sommittelu ja ihan huikea ja väreiltään mahtava & melkeinpä symmetrinen revontuliverho. Wau! 

Heidi Rikala - 19.12.2015 at 15.07 Report this

Ohho! Kylläpä on huikeat kuvat ja tulet! Pääsispä itsekkin moisille tulille joskus. Hienon kuvauspaikan olet löytänyt, lato sopii upeasti etualalle.

Kirsi Volanen - 19.12.2015 at 15.50 Report this

Kuvatkin  on supermakeita.

Aija Kaartinen - 19.12.2015 at 18.29 Report this

Kaikki hienoja, mutta ensimmäinen superhieno!

Raija Ollikainen - 19.12.2015 at 22.54 Report this

Mielettömän hienoja kuvia! Ensimmäinen kuva on einfach atemberaubend, mutta noita kaikkia katsoessa täytyy ihan pysähtyä ihmettelemään, miten kaunista tämä karu kotiseutu on... Danke, Thomas!

Marko Pekkola - 20.12.2015 at 17.13 Report this

Järkyttävän hieno tuo eka kuva. Toisessakin kompositio on ällistyttävän loistava. Revontulialue on suostunut hyvin yhteistyöhön, että muoto polveilee kuten katot.

Olli Sälevä - 20.12.2015 at 18.47 Report this

Komeat kuvat komeista tulista. Onkohan tuo kolmannen kuvan auto jotenkin vertailukelpoinen noiden edellisten kuvien latoröttelöiden kanssa? ;-)

Matti Helin - 22.12.2015 at 08.56 Report this

Hui. Tuo ykkönen on pikkuisen komea! Ei kyllä muissakaan vikaa. 

Jaakko Tanttari - 30.12.2015 at 21.01 Report this

Todella hienoja kuvia!

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