Half-sky auroras - 2.3.2017 at 20.00 - 3.3.2017 at 03.00 Muonio Observation number 62125

Visibility IV / V

Mikko Lönnberg

Here would be a few pictures from the second night of the Northern Lights trip.

The standard shooting locations of that Pallas-Yllästunturi National Park are already starting to repeat themselves, so you had to try to look for a different angle, not when snowshoes on your feet and climbing to the top of Lommoltunturi. even better, I'll leave something to remember :) When I reached the upper slope, the arches started to intensify and spread over a wider area, the highest arches already crossed Otava, which is a sign of intensifying the show. The words of the curse echoed in such a quiet night in Lapland, despite the four heaters, the lens pulls into the mist again. Tena, which is quite difficult to get rid of afterwards. , yes, there were some very successful pictures from there, and I'm happy to look at these landscapes sometimes but through the camera.

I will put the pictures for the next night again, as long as the light, Repos pictures accumulated on this trip more than 1500 :)

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

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Additional information

Aurora brightness
- Very bright auroras
Colors with unaided eye and other features
- Red coloration of the shapes lower edge
  
  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
  
  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
  
  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
- Veil
  
  Veil
  Veil is the most bland and very common form of aurora. It usually covers its homogeneous dim glow over a wide area of the sky at once. Most often, the veil is seen in the calmer and quiet phase of the night after the aurora maximum as a background for other forms. The veil can also occur alone and in that case it will be quite difficult to reliably identify as an aurora, especially at a observation site which has a lot of light pollution.
  
  A similar glow of light can also be caused by airborne moisture, smoke, or a very thin layer of clouds that reflects the light that hits them. However, clouds can also be used to identify veil, especially if the middle or upper cloud appears dark against a lighter background, then it is very likely to be aurora veil if the brightness of the background sky is not due to the rising or falling Moon or Sun. When photographing, very long exposure times usually reveal the green colour of the veil auroras.
  
  Veil and rays. Photo by Esa Palmi.
  
  Red aurora veil. Photo by Marko Mikkilä.
  
  Veil. Photo by Milla Myllymaa.
  
  Aurora veil that changes color from green at the lower edge through purple to blue at the top. Photo by Jaakko Hatanpää.
  
  Dim green veil. Photo by Jarmo Leskinen.
  
  Radial aurora band surrounded by veil. Photo by Jussi Alanenpää.
- 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
- Band
  
  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
  
  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
  
  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: 4 pcs

Raija Ollikainen - 22.3.2017 at 02.13

Illalla AN oli kirkaanpunaisena, mutta Oulun taivas umpiharmaana. No joo, ottihan se tosissaan päähän. Aloin selata Vahtia, ja heti hatutus unohtui kun sieltä löytyi uusi kuvasatsi. Ja kertomus! Ne on mahtavia kans, nytkin tuntui kuin ois kulkenut ja kiroillut völjyssä. :)

Kun katsoin kuvat ekan kerran yksitellen tabletilta, niin jos siinä olisi ollut ääniyhteys suoraan Poriin, olisit kuullut mm. tällaisia kommentteja: "Voi ihana...", "Oi et-tä...", "Hui kauhia, miten ne voi olla nuin hirviän kirkkaita!", "Voi että mikkä värit!", "On se mahtavaa että tuo Mikko jaksaa kulukia kuvvaamasa näitä". :)

Satu Juvonen - 22.3.2017 at 13.46

No jopas on komeat leimut ja upeat kuvat. Tykkään erityisesti kolmasvikasta, vauhdikas liike!

Minkälaisia lämmittimiä sinulla oli käytössä? Olen käyttänyt kertakäyttöisiä sormenlämmittimiä, 1 tai 2 kpl kuminauhalla kiinni. Niillä on ainakin tähän mennessä pysynyt aina linssi kirkkaana.

Olli Sälevä - 23.3.2017 at 20.14

Upeat kuvat. Kolmosessa hienot kiemurat Pallasjärven päällä.

Mikko Lönnberg - 24.3.2017 at 09.34

Kiitokset Raija,Satu ja Olli..

Noita kertakäyttöisiä lämmittimimiä mullakin on käytössä ollut ja hyvin ne ovat linssin sulana pitäneetkin.Oma veikkaukseni on,että tuolla huipulla vaan on tuo kuuran (tykyn) muodostuminen niin voimakasta että edes nuo lämmittimet ei riitä tietyissä olosuhteissa pitämään linssiä sulana.Parin tunnin kuvailujen jälkeen tuolla ylhäällä on vaatteet,jalusta,kamera ja kaikki kamat jo paksussa kuurassa jota ei koskaan tapahdu maanpinnalla.Hetken kyllä kävi mielessä sekin,että nuo lämmittimet ei toimineet,mutta kyllä aamulla olivat vielä todella kuumia,eli niitäkään ei voi syyttää..

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Half-sky auroras - 2.3.2017 at 20.00 - 3.3.2017 at 03.00 Muonio Observation number 62125