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Ursa Astronomical Association

Quiet aurora band - 27.9.2019 at 22.32 Juupajoki Observation number 85854

Visibility II / V

Riku Talvio, Ursa (Länsi-Suomi)

The weather forecast peaked on a cloudy night, and that’s what it looked like at first; my first mooring place was firmly in the cloud. However, in the direction of the north, a promising small opening was visible, so I decided to go and see if there would be a suitable place to use it - and it was there. The sky was clear, except for one cloud raft that covered almost all the green that was on the northern horizon. I waited a long time without seeing the northern lights, and I didn’t even bother to set up the camera equipment. Then a "torch" began to rise from the west / northwest, the development of which I admired, completely forgetting to take pictures. Eventually I realized digging into the camera backpack, and got a picture of the already fading STEVE.

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Additional information
  • Aurora brightness
    • Dim 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

Comments: 3 pcs
Mikko Peussa - 28.9.2019 at 14.51 Report this

Hieno kuva tuosta ilmiöstä!

Timo Alanko - 3.10.2019 at 20.17 Report this

Onhan tuo upea ilmestys! Tiedetäänpä, mitä seuraavien reposten aikana tähyillään. Tuskin tulee tavaksi. Moni sai tuosta once in a lifetime - otokset :) 

Eero Karvinen - 4.10.2019 at 00.53 Report this

Villi arvaus on, että näitä tullaan näkemään lisää. Nyt sai arvokasta dataa magnetometristä, millaisessa olosuhteessa esiintyy. Hyvin osui yhteen kirjallisuudessa mainittuun olosuhteeseen, eli alimyrskyn palautumisvaihe ja ennen magneettista keskiyötä.

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