Contact information

Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

Active aurora band - 27.9.2019 at 22.38 - 27.9.2019 at 22.38 Pori Observation number 87823

Visibility III / V


Green rays emanated from Steve's arc, which also stood out to the naked eye. It looked great!



More similar observations
Additional information
  • Aurora brightness
    • Bright auroras
  • Observed aurora forms
    • STEVE-arc info

      STEVE (Strong Thermal Emission Velocity Enhancement), Pink, radial aurora-like arc  . The STEVE arc is seen clearly separated from the main aurora arc of the northern sky. It forms a long and narrow west-east aligned, usually dim form. It does not belong to traditional auroras as a phenomenon, but may appear same time with them. Occasionally there may also be a green, "toothed" band called ”picket fence” at the bottom of Steve.  

      Riku Talvio, STEVE
      Photo by: Riku Talvio

    • Picket fence info

      A picket fence is a green form of aurora (northern lights) with short vertical beams.

      Picket fence often occurs under the purple-gray STEVE arc, but can also be an independent green radial arc.

      In the picture, the board fence is shown in the upper right corner under the STEVE arch. Photo by Sirpa Pursiainen

      The picket fens gets sometimes mixed up with normal green belt with rays. In Picket Fence, the individual rays are clearly separated from each other and the arc of the rays is clearly separated from the rest of the northern lights. The fences of the fence also do not form a single curtain extending up to the pole of the sky.

      Picket fence can also occur independently without a STEVE arc. The picture shows very well how the Picket Fence is separated from the rest of the northern lights and does not expand upwards. Photo by John Andersen

Comments: 1 pcs
Eero Karvinen - 8.2.2020 at 12.56 Report this

Hirmuisen hieno STEVE Picket-Fencen kanssa.

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