Newest observations

Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Quiet aurora arc - 7.8.2021 at 01.00 - 7.8.2021 at 02.00 Asikkala Observation number 100295

Visibility II / V

The idea was to go describe both the illuminating night clouds and the northern lights, but only the dim northern lights finally appeared. The photo was taken at about 0200, when the northern sky was already starting to brighten very hard.

More similar observations
Additional information
  • Aurora brightness
    • Very dim auroras
  • Observed aurora forms
    • Arc info

      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: 2 pcs
Markku Ruonala - 7.8.2021 at 12.07 Report this

Hienosti onnistuit kuvaan kaaren.

Matti Helin - 7.8.2021 at 13.25 Report this

Hyvä havainto ja hieno kuva 

Send a comment

Comments are checked and moderated before publication If you want to contact the observer directly about possibilities to use these images, use the Media -form.



characters left

By sending in this comment I confirm, that I've read and understood the the observation system's privacy policy.