Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Half-sky auroras - 7.10.2015 at 20.00 - 8.10.2015 at 01.00 Helsinki Observation number 43771

Visibility IV / V

Matias Takala, Kuopion Saturnus

I followed the development of the geomagnetic storm throughout the day and in the evening it began to look strongly that something could be visible as soon as it got dark. This was the case, the northern sky was covered with a dim aurora borealis, and quite surprisingly an active arc of northern lights was visible in the southern sky (Fig. 2). The greatest enthusiasm for the northern lights has already passed in my case, when I couldn't stand the occasional balcony observation any more. A couple of sub-storms momentarily produced bright northern lights e.g. at about 9.40 and 23.20. From the latter, however, I got a few squares (Figure 1), though the clouds began to drip into the sky to disturb them. After all, it is always a rare treat for both of them that northern lights can be seen in Stad's light pollution!

More similar observations
Additional information
  • Aurora brightness
    • Bright auroras
  • Colors with unaided eye and other features
    • 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.

    • Violet auroras info

      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;Rays;Band;Arc
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.