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Ursa Astronomical Association

Aurora rays - 30.10.2013 at 23.13 Mäntyharju Observation number 19633

Visibility II / V

Markku Siljama, Ursa (Etelä-Suomi)

After a faint performance in the early evening, a new play followed in the middle of the night, which was much more active. The northern sky under Otava was covered with greenish gauze. rapid changes, as if dim waves and pulsating spots had pushed from the north. After that, the play began to calm down into a flat gauze

I followed the situation at 23.10-00.40, weather: -1 ast, calm

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

  • Observed aurora forms
    • ;Form not identifiable;Veil;Rays
Technical information

Canon EOS 1100D 18 mm

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