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Ursa Astronomical Association
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Ursa Astronomical Association

Half-sky auroras - 14.3.2022 at 02.00 - 14.3.2022 at 02.30 Mäntyharju Observation number 105131

Visibility IV / V

These northern lights started with a bright arc in the northwest that I didn’t have time to describe. When I got out, there was a full flicker in the sky. Of these, I don’t know if they were flaming or fluttering, etc. (video). At the same time, the moon had strange ravines that appeared for a while (Fig.1). After this show, the repos of the north began to move with varying brightness and colors. Everything went fast and I didn’t have time to make any adjustments to the camera. Korona visited several times and tried to spread a little to the south. Whether it was a quick movement that took half an hour.

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

    • Form not identifiable info

      Form not identifiable
      Sometimes auroras have to be observed in such poor conditions that it is not possible to reliably identify the shape even if for example the structure and conditions could be recognized. Such a situation could be the outcome of for example alight background sky, cloud cover or a covered horizon.

  • 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.

    • 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.

    • Flickering auroras info

      Flickering. This rare subclass refers to a situation where irregular variations in brightness occur in aurora, such as in fluttering flames.

Comments: 2 pcs
Eero Karvinen - 19.3.2022 at 21.24 Report this

Chorus-aallot näkyy alimmassa animaatiossa hyvin! Välkkyminen oli kerrassaan upeata.

Jukka Kytömäki - 20.3.2022 at 17.01 Report this

Kiitos Eero. Välkkyminen tuli yllätyksenä ulos päästyäni. Aloitin vain nopeasti kuvaamaan manuaalisesti suurella iso-arvolla kuvia 56 kpl. Näistä tein videon, jotta välke erottuisi jotenkin. Lopputulokseen olin tyytyväinen. Ykkös kuvassa kuun päällä olevat heltat jäivät myös mieleen. Niitä esiintyi ainoastaan välkkeen aikana. Kuvasin 1/4 osa sekunneilla toiveeni saada nekin näkyviin. Oli upeat tulet.

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