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Ursa Astronomical Association
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00130 Helsinki

Ursa Astronomical Association

Half-sky auroras - 13.10.2016 at 21.43 - 13.10.2016 at 22.18 Vaasa Observation number 57924

Visibility IV / V

Timo Alanko, Vaasan Andromeda

The alarm came once in time. At 9.30 p.m., the countries had nothing but a faint belt facing north. On the south side, however, was some vague dim fuss that the camera revealed to be green. From there, Korona ruptured, and then a belt stretching from far west to far east, which refused to fit into the field of view of even the Kasimian Samyang :) Finally, the action shifted northward in several belts and then faded into a dim fog.

A few stills and the rest as an animation.

More similar observations
Additional information
  • Aurora brightness
    • 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.

    • Pulsating auroras info

      Pulsating aurora. The brightness of the pulsating aurora usually varies rhythmically over a period that can be only a fraction of a second at its fastest, but can also be several minutes. Pulsing usually only occurs in(strong auroral conditions) higher quality shows , especially towards the end of them. However, the pulsation may be followed by yet another eruption. Sometimes the variation in brightness is at the same stage in the whole form, whereby the whole form "turns on and off" at the same time. Pulsation is also found in arches and bands, but above all in spots..

    • 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.

    • Violet auroras info

      Usually in Lapland or even in the south you can see purple auroras in stronger aurora shows. The most common color in auroras along with green and red.

  • Observed aurora forms
    • 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.

    • 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.

Technical information

EOS 1100D and Samyang 8 mm

Comments: 9 pcs
Jukka Kytömäki - 14.10.2016 at 11.15 Report this

Hienot ja hyvät kuvat. Sävyala sopivasti kohdallaan. Oliko kamerasi säädöissä kontrasti minimin puolella. Se tuo usein kirkkaissa revontulissa sävyt paremmin esille. Onnea vain hienoita kuvista. Täällä itä-kaakon sunnassa taivas on täysin pilvessä. Edes kuun hahmoa ei näkynyt. Myös muidenkin viimeyön kuvat ovat todella laadukkaita ja hyviä esityksiä.

Timo Alanko - 14.10.2016 at 11.25 Report this

Kuvat ovat luomuja suoraan kamerasta. Lienee oletusasetukset päällä.

Juha Kinnunen - 14.10.2016 at 12.47 Report this

Hyvät kuvat, komea on ollut näytös siellä.

Harry J Lehto - 14.10.2016 at 13.38 Report this

On vähä hienoja! Pilviä koetettiin puhaltaa tieltä mutta voimat ei oike8in riittäneen lounaisessa Suomessa.

Timo Alanko - 14.10.2016 at 14.00 Report this

Oli niin nopeaa liikettä, että olisi kaivannut herkempää kameraa. ISO 3200 mahdollisti 4s valotukset, mutta tuo tällä kameralla jo kovasti kohinaa kuviin. Pitäisi olla Sony. Alle puolen sekunnin valotukset olisivat olleet rautaa eilen. Nyt kärsi terävyys pahasti.

Kaj Höglund - 14.10.2016 at 15.22 Report this

Upeita kuvia!


Tommi Järvilehto - 14.10.2016 at 16.17 Report this

Hienoja kuvia. Vihreätä soppaa oli taivaalla ;)

Olipas pitkät valotukset noin isolla ISOlla.


Timo Alanko - 14.10.2016 at 16.23 Report this

Samppaa on pakko himmentää. Piirtää mössöä täydellä aukolla. Nyt kurkki aukon 5.6 läpi...

Erkki Antikainen - 14.10.2016 at 20.09 Report this

Hienot kuvat komeasta näytöksestä! 

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