Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Quiet aurora arc - 6.10.2015 at 21.30 Valkeakoski Observation number 43420

Visibility II / V

Although the forecast did not yet work wonders, I would go to the beach to check out the situation. That's where the familiar arc was again, this time higher than the horizon. Unfortunately, it dimmed as it activated, making it difficult to follow the flutter. My paperback won’t keep up with the swing, but hopefully one of you good photographers will be captured for observation.

Addition: An hour later, when I went outside again at about 10.30pm, the actively moving belt below the calmer arc became brighter. The rays and spots were clearly distinguished. The movement stopped pretty soon, but I don’t know how long it had lasted before I left to watch.

More similar observations
Additional information
  • Aurora brightness
    • Dim 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.

    • 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.

  • Observed aurora forms
    • ;Rays;Band
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.