Half-sky auroras - 14.1.2022 at 20.30 - 14.1.2022 at 22.00 Kempele Observation number 103896

Copyright © 2022 Marko Haapala. All rights reserved.

Visibility IV / V

Marko Haapala

The evening was windy and the wind made it feel a bit chilly so it was enough to talsima to the adjacent field than to try to cycle 30 km in a slightly darker place.

The environment was sown in the glow of wasted light, which in turn was cursed, unlike in the time of the artificial light pillars. However, the northern lights turned dim and started shooting as early as 18:30 and it was slowly clear that the focal length was not enough for anything.

The moon also shone in the sky, providing at least lens reflections and slightly dimming the glow of repos.

In the end, the arch went behind the back and it was already clear that we had to talk to another field where it was possible to point the camera a little more upwards or upwards.

Tarpominen was slow when at times there were enough northern beams in unpredictable directions and terrible perspectives. In hindsight, it should be noted that the first Dunes were in the pictures at 20:30, if they had been there before, but the forest was a visual barrier.

The terrain could not be blurred by talking directly so it was a bit twisted and just when I had reached the place so that the picture area was even reasonable, there was already a hint from Laitila that what was there.

I managed to take a few pictures there, but at that moment the cloud flew in front of the Dunes so I didn't see what happened to them, whether they faded or how they disappeared. Then that night had only just begun, but no more. He only got to sleep at five in the morning.

In the end, given the circumstances in such other traditional places as if he had been filming it would have been left undescribed. Even on a bike, that place is not changed in an instant, especially if you want the image perspective to be in order.

The pictures have also been carefully cropped since then. Well, maybe sometimes the more upbeat you do a little better.

This description has been automatically translated from Finnish. Click here to see the original text.

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Additional information

Aurora brightness
- Bright auroras
Observed aurora forms
- Arc
  
  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.
- Rays
  
  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
- Dunes
  
  Dunes
  
  The dunes are a dim and very rare shape that has so far been associated with the aurora visible in early evening.
  
  Aurora dunes can be most easily confused to ribbons on lower clouds. In order to fill in the description of the phenomenon, a striped pattern formed by parallel lines must also appear in the aurora. The stripes are most easily recognizable right at the front edge of the aurora but they may also occur among the rest of the aurora.
  
  The dune auroras are visible as a parallel striped float. Photo by Tapio Terenius
  
  Raidallisen dyynilautan reunassa voi toisinaan olla voimakastakin aaltoilua.
  
  There can sometimes be strong ripples at the edge of a striped dune float. The rippling of the edge of the dune float can vary from minor to large (pictured). Photo by Pirjo Koski

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