Active aurora band - 16.4.2021 at 23.39 - 17.4.2021 at 00.12 Tampere, Terälahti Observation number 101738

Visibility III / V

Sirpa Pursiainen

As I watched the northern lights last spring, I noticed that there may be dunes between the bluish rays. These are shown in a few pictures.

That night there was also a particularly pink among the northern lights, which was not a traditional fast-moving pink, but lingered in the sky, moving more slowly from west to east.

This description has been automatically translated from Finnish. Click here to see the original text.

2 1

Additional information

Aurora brightness
- Bright auroras
Observed aurora forms
- Dunes
  
  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

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.

Newest observations

Contact information

Active aurora band - 16.4.2021 at 23.39 - 17.4.2021 at 00.12 Tampere, Terälahti Observation number 101738

Dunes