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taivaanvahti(at)ursa.fi

Ursa Astronomical Association

Quiet aurora band - 7.10.2018 at 20.34 Pori Observation number 87799

Visibility II / V


7.10.2018 was an exceptionally handsome northern lights show that I was admiring in the nearby field with my son. Today (January 29, 2020) has been reported about a new form of northern lights, a dune that has been visible that night. I had to dig out the boxes myself, and a couple of pictures were found in which the phenomenon can be seen.



More similar observations
Additional information
  • Aurora brightness
    • Dim auroras
  • Observed aurora forms
    • Dunes info

      Dunes

      The dunes are a dim and very rare shape that has so far been associated with the aurora visible in early evening.

      Aurora dunes can be most easily confused to ribbons on lower clouds. In order to fill in the description of the phenomenon, a striped pattern formed by parallel lines must also appear in the aurora. The stripes are most easily recognizable right at the front edge of the aurora but they may also occur among the rest of the aurora.

      The dune auroras are visible as a parallel striped float. Photo by Tapio Terenius

      Raidallisen dyynilautan reunassa voi toisinaan olla voimakastakin aaltoilua.

      There can sometimes be strong ripples at the edge of a striped dune float. The rippling of the edge of the dune float can vary from minor to large (pictured). Photo by Pirjo Koski

Comments: 1 pcs
Emma Bruus - 29.1.2020 at 12.05 Report this

Ihan selkeät Dyynit, onnittelut!

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