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Ursa Astronomical Association

All-sky aurora - 18.3.2015 at 00.59 Lahti Observation number 35533

Visibility V / V

Samuli Ikäheimo, Lahden Ursa

Northern Lights Storm Report Part 2. Link to Part One.

After the repositories in the early evening, a small break had to be taken with the forwarding of the images, with the cameras in the mold at half past eleven.

The first observation point was the tiny Palolampi, which is very close to home. The street lights were brighter than the memories, but still the flutter of the corona was easily noticeable. Second picture of this place.

The following pictures were taken at a fast pace next to Lahti Energia's waste incineration plant. Here, too, the lighting posed quite a challenge, so after a couple of panoramas, the journey continued through the gas station to Merrasjärvi. In the triangle image, then, is Lahti Energia's power plant.

Fortunately, the light sources on the shores of Lake Merrasjärvi stayed farther away, so the view above got its rights better. It was breathtaking.

The tree rake began again; when the northern lights were visible everywhere, the problem was the lack of abundance, there was almost too much to describe!

Equipped with two cameras, however, a variety of images were captured from the sky. At times, the 6D was in timelee trees while the a7S was looking for more active spots for video experiments, sometimes Sony was content with more static video when the most spectacular moments had to be captured with 6D.

It was not necessary to be on the beach all the time, because on a few occasions others came to marvel at the nature play. The number one picture in the report of this encounter between man and nature.

What is interesting is that a large part of the images were focused to the south, at least to some extent. Usually here in a repo yacht you have to cram the northern horizon in the hope of a small run, but this time the strongest events seemed to be found south of the zenith. Of the images in the report, only the Fifth is taken to the north.

It was also funny to see the van of an airplane flying over the city visible as a silhouette and not illuminated by city lights as usual. Says something about the brightness of fires. So this in the sixth picture.

I have to say that while winter has been depressingly gray when it comes to circling the sky, I think this evening and night will last a long time again. Exactly two years ago, the northern lights storm struck at the same time as the first even more serious constellations were taken from Comet 2011 L4 Panstarrs . It left an indelible impression on myself, pushing hard in the direction of this hobby.

This time the performance was even more powerful. Hopefully, then, the interest in following the events of heaven will arouse in the minds of others as well.

More similar observations
Additional information
  • Aurora brightness
    • Very bright auroras
  • Colors with unaided eye and other features
    • Streaming auroras info

      Streaming. In streaming aurora fast irregular variations in brightness occur along the horizontal dimension of homogeneous shapes.

    • Flickering auroras info

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

    • 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.

    • Pulsating auroras info

      Pulsating aurora. The brightness of the pulsating aurora usually varies rhythmically over a period that can be only a fraction of a second at its fastest, but can also be several minutes. Pulsing usually only occurs in(strong auroral conditions) higher quality shows , especially towards the end of them. However, the pulsation may be followed by yet another eruption. Sometimes the variation in brightness is at the same stage in the whole form, whereby the whole form "turns on and off" at the same time. Pulsation is also found in arches and bands, but above all in spots..

    • Blue auroras info

      Clearly blue auroras can be seen only during the best aurora displays close to the maximum phase or soon after it. Sometimes blue auroras can be seen shortly after the sunset at the top part of the auroral shapes, specially rays. It is created by the mission of the ionized nitrogen molecules created by the suns radiation.

      Strongly colored blue auroras. Photo by Jorma Mäntylä.

      Blue top parts of the aurora. Image by Tom Eklund. 

      Blue top parts of the aurora. Image by Jaakko Hatanpää.

      Partly blue corona. Photo by Tapio Koski.

      Faintly blue top parts of an aurora veil. Photo by Jaakko Hatanpää.

    • Red coloration of the shapes top info

      Auroras which have red top part that can be seen with naked eye are most often observed in the bands and long rays. In this case the lower parts are usually green. If the upper parts are in sunlight, red may be stronger than green. This shade of red is due to the discharge of the excitation state of the atomic oxygen.

      Aurora that shift to reddish towards the top. Photo by Karri Pasanen. 

      Red top in a aurora band. Photo by Simo Aikioniemi.

      Red at the top of the aurora. Picture of Tom Eklund.

    • Red coloration of the shapes lower edge info

      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 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.

    • White auroras info

      Paljain silmin valkoinen väri näkyy useimmiten himmeissä näytelmissä, kun silmä ei kykene erottamaan mitään varsinaista väriä. Harvoin kirkkaissa näytelmissä valkoinen väri voi myös syntyä sopivista vihreän, punaisen ja sinisen yhdistelmistä.

  • Observed aurora forms
    • ;Veil;Rays;Band;Corona;Arc
Technical information

Sony a7S, Canon 6D, 15 / 2.8, 24 / 1.4.

Comments: 5 pcs
Tuija Liunala - 19.3.2015 at 19.52 Report this

komiat on loimut  !

Samuli Ikäheimo - 19.3.2015 at 20.01 Report this

Heh, jostain syystä Taivaanvahti antaa varsin jänniä EXIF-tietoja kuville. En tiennytkään kuvaavani kameramllilla "ijänne Tavas". :D Metadatan lisäämisellä (description, keywords) kuviin lienee jotain tekemistä asian kanssa.

Kuvien sävyjen osalta yritin pitää jonkinlaista saman kaltaista linjaa yllä. Kaupungin valosaaste toi varsin paljon ongelmia taivaalla, kuten myös vauvankakanruskea sävymaailma ympäristössä, mutta ehkäpä revontulet on tunnistettavissa.

Vielä kun saisi säädettyä pallopanoraamat, timelapset ja videot valmiiksi jossain välissä..

Jesse Kyytinen - 19.3.2015 at 20.15 Report this

On kyllä nämäkin... Aivan huikeaa!

Ja todellakin hauskat nuo EXIFit, mites sinä noin hienoja kuvia olet saanut, vaikka olet valottanut -0,65 sekuntia...

Samuli Ikäheimo - 19.3.2015 at 20.20 Report this

Okei, myönnetään.. sen lisäksi että valovoimainen linssi toimii näppäränä valoämpärinä, ijänne Tavas -kamerani on myös eräänlainen revontulitykki. Kamera ei ainoastaan tallenna valoa, vaan myös lähettää sitä taivaalle negatiivisten valotusaikojen myötä.

Pitäisikin ehkä näpytellä asiasta foorumin kosmologia-osioon sivun tai kymmenen verran..

Antti Rinne - 19.3.2015 at 20.39 Report this

Eikö negatiivinen valotusaika tarkoita sitä, että se valottaa kyseisestä ajanhetkestä valotusajan verran menneisyyteen? Sellaiselle kameralle olisi itsellänikin usein käyttöä, kun tuppaa monesti olemaan tuo laukaisinsormi juuri sen ratkaisevan silmänräpäyksen verran myöhässä.

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