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Ursa Astronomical Association
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00130 Helsinki

Ursa Astronomical Association

Active aurora band - 26.9.2016 at 21.32 - 26.9.2016 at 23.55 Pori Observation number 57349

Visibility III / V

For a long time again in the Repos yacht. however, fade, but the arc just remained dim and lifeless. , no insanely fast movement, but the rays rose quite high and moved from end to end of the arc, sometimes becoming brighter. This most active phase lasted about 10 minutes, after which it slowly began to fade and after about half an hour wait, pretty pretty show up This work and a few pictures also came off ..

More similar observations
Additional information
  • Aurora brightness
    • Bright auroras
  • 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.

    • 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
    • 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.

Comments: 9 pcs
Kari Rytilahti - 27.9.2016 at 18.12 Report this

Upea setti reposista jälleen.

Jarkko Suominen - 27.9.2016 at 19.23 Report this

Hienoja kuvia eiliseltä. Oletkos ajatellut, että tulisit käymään Porin Karhunvartijoiden tähtitornilla?

Heidi Rikala - 27.9.2016 at 19.36 Report this

Upeaa! Ei voi muuta, kun huokaillen katsella.

Pentti Arpalahti - 28.9.2016 at 03.23 Report this

Tällä kertaa pilviä revontulien välissä. Ovelasti asettuivat visuaaliset elementit kuviin.

Markku Ruonala - 28.9.2016 at 17.28 Report this

Hienoja revontulikuvia jälleen Mikolta.

Olli Sälevä - 28.9.2016 at 19.07 Report this

Kyllä noita kelpaa katsella ja kuvata.

Mikko Lönnberg - 28.9.2016 at 19.34 Report this

Kiitokset kaikille kommenteista !!

Jarkko.. Eipä ole tullut ajateltua,kun en ole tiennyt edes tuollasen olemassa olosta :) pitääpä pikkasen netistä katsoa.

Jälleen olis revontuli arvot kohtalaisen hyvät ja tänne lounaaseen luvattu yöllä selkenevää,taitaa mennä taas valvomiseksi tämäkin yö !!


Jarkko Suominen - 29.9.2016 at 10.36 Report this

Tässä kotisivut:

Tommi Lyytikäinen - 1.10.2016 at 19.26 Report this

Aivan mahtavaa. Ei voi kuin unelmoida että sattuu omalle kohdalle tällaisia.

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