All-sky aurora - 27.2.2014 at 19.00 - 28.2.2014 at 02.00 Jyväskylä, Nyrölä Observation number 22482

Visibility V / V

Arto Oksanen, Jyväskylän Sirius

The northern lights were left behind the clouds this time, but their green light illuminated so much that they are clearly visible in a keogram composed of images from the Nyrölä Observatory's automatic AllSky camera (time 00-00 UT as a horizontal axis, south-north as a vertical axis). In the second picture, all the pictures taken during the day.

http://nyrola.jklsirius.fi/ccd/capture/allsky/

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

8 11

Additional information

Aurora brightness
- Can only be seen in photos
Observed aurora forms
- Form not identifiable
  
  Form not identifiable
  Sometimes auroras have to be observed in such poor conditions that it is not possible to reliably identify the shape even if for example the structure and conditions could be recognized. Such a situation could be the outcome of for example alight background sky, cloud cover or a covered horizon.

Colors with unaided eye and other features
- Green auroras
  
  Green, seen with the naked eye, is one the most common colors of the aurora. The green color is derived from atomic oxygen.
  
  Green auroras. Lea Rahtu-Korpela.
  
  Green auroras. Photo by Juha Ojanperä.

Technical information

Canon EOS 350D, Samyang 8mm fisheye, auto-changing shutter speed, images every 5 minutes.

Comments: 2 pcs

Janne Kari - 28.2.2014 at 10.53

Me tuolla porukalla illalla katseltiin (ja naureskeltiin) tuota nyrölän kuvaa kun se oli aivan täysin vihreä :)

Hieno tapa raportoida "huono" ilta!

Marko Pekkola - 28.2.2014 at 20.34

Samaa mieltä, todella kekseliäs, hieno havainto.

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All-sky aurora - 27.2.2014 at 19.00 - 28.2.2014 at 02.00 Jyväskylä, Nyrölä Observation number 22482