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Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

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Quiet aurora arc

Quiet aurora arc

4.11.2015 at 18.32 - Hankasalmi, Murtoinen (II)
Arto Oksanen, Jyväskylän Sirius

The red northern arc (SAR), which was widely observed the night before, was also visible in the pictures of the Hankasalmi allsky camera on Wednesday night, but now clearly further south. Observation of the previous night: http://www.taivaanvahti.fi/observations/show/45298

Comments: 3 pcs

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Quiet aurora arc

Quiet aurora arc

3.11.2015 at 18.57 - Outokumpu (II)
Tapio Terenius

Would the proton arc have caught the cell from the southern sky? Sadly, the clouds came to ruin the findings too quickly. The arc was dim compared to e.g. the Milky Way. I don't think I saw it with the naked eye.

Images: 2 pcs • Comments: 1 pcs

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Quiet aurora arc

Quiet aurora arc

3.11.2015 at 18.40 - 20.10 - Tampere (II)
Jari Luomanen, Ursa (Länsi-Suomi)

This may be the so-called SAR arc (Stable Auroral Red arc). See e.g. http://onlinelibrary.wiley.com/doi/10.1029/RG011i004p00935/abstract This red arc remained in place for well over an hour from the beginning of your observation session! While recording the test exposures, I marveled for a moment at this line of light that stood still until it slowly began to ignite ... it must have been a slightly more special Northern Lights phenomenon. Time-child video can be found here . Click on the video at 1080 resolution to see it in HD quality. The video has an approximately 90-minute time window comp...

Images: 2 pcs • Comments: 3 pcs

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Search result contains observations from time period 3.11.2015 klo 12.00 - 5.11.2015 klo 12.00.