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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Active aurora band - 4.10.2021 at 00.00 - 4.10.2021 at 02.00 Valtimo Observation number 101718

Visibility III / V

Whether the drawing is dim or bright, but I think the set was so lazy that the mats best describe. This set did not provide any clear storm. Several oval accumulations and brightenings followed one another during the night. There were few threads. As the main color, the green emission of oxygen was 557.7 nm and in some of the images also the reddish upper part was weakly separated.

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Additional information
  • Aurora brightness
    • Dim auroras
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