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Ursa Astronomical Association
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Ursa Astronomical Association

Active aurora band - 4.9.2022 at 00.20 - 4.9.2022 at 02.40 Vaasa Observation number 109063

Visibility III / V

Timo Alanko, Vaasan Andromeda

OsmoAction was on duty on the roof in case of repos. Fortunately, I weather-protected the auxiliary power connection with a blue sticker. That's how much water the camera got up its neck during the night. After all, the activity we saw there was also behind the clouds :) A couple of timelapse videos of the "clearest" parts of the night.

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

    • 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

Comments: 3 pcs
Marko Myllyniemi - 4.9.2022 at 11.24 Report this

Harmittaa aikalailla, että kerrankin kun olisi reposia tai jotain muuta mielenkiintoista taivaalla niin sitten on enemmän tai vähemmän pilvistä...

Timo Alanko - 4.9.2022 at 14.55 Report this

Hieman sitä harmitusta lievittää se, että ei innostunut itse valvomaan turhaan. Toki Osmon timelapse on lähinnä dokumentointia. Taiteellisemmat ja laadukkaammat kuvat vaatisivat enemmän uhrauksia.

Timo Alanko - 4.9.2022 at 19.22 Report this

Näyttää muuten siltä, että neljän jälkeen juuri ennen aamunkoittoa on ollut kirkkaampi piikki. Näkyi lapsessa pilvien raosta. Loimotus olisi todennäköisesti ollut komeaa pitkin yötä ilman noita saam.... pilviä.

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