David's Astronomy Pages (All Sky Camera) Aurora on night 2025-01-19 / 2025-01-20

Aurora 2025-01-10

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Aurora 2025-01-19

Aurora

Notes

Night Summary (Keogram) Plot AllSky Pictures Videos Magnetometer Stack Plots (for reference) Planetary K-Index Plot (for reference) Aurora Forecast, NOAA/Ovation (for reference)

- Weak auroral activity on the night 2025-01-19 / 2025-01-20 associated with geomagnetic activity up to KP3-KP4. Skies in NE Scotland were generally clear but with passing cloud. f    Weak activity was visible on camera images 19:45 to 03:30 UT. Peak activity at around 22:50 UT, with a secondary peak around 02:50 UT. Observed activity comprised weak auroral glow an occasional arc to 6° and occasional moving curtains and rays to 12° altitude. Earlier part of display partially hidden by cloud along north horizon. The aurora display was recorded using the Observatory's new Tapo C325WB Colour Night Vision Camera, with images processed in real time by a new AstroColorCam program built for handing the frames captured by iSpy. Images and video below compare colour images captured by the new Camera, with the black/white images captured using the existing AllSky Camera at approximately the same time.   -  Scandinavia magnetometers recorded activity throughout the night, with peak activity at around 22:10 - 23:50 UT, but with other peaks around 21:00 & 00:00 UT     -

Night Summary (Keogram) Plot

Night Summary Plot - North Sky (2025-01-19) Times on plot are local times (GMT  = UTC +00h ) Weak aurora noticeable against bright moonlit sky at around 21:00 to 21:15 and 22:30 to 00:15 UT

Night Summary Plot - North Sky (2025-01-19) Times on plot are local times (GMT  = UTC +00h ) Aurora not obvious on b/w keogram due of the cloudy intervals

Scandinavia Magnetometers vs NorthCam Keogram - 2025-01-19

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Pictures (AllSky Camera)

Panoramic View - Northern Sky

2025-01-19 20:07 UT (GMT) Auroral arc / moving curtains low to horizon in N-NNE direction.

2025-01-19 22:52 UT (GMT) Increased Aurora activity. Red aurora in NNW direction to Only faintly visible on AllSky Images (bottom)

2025-01-20 00:52 UT (GMT) Auroral arc to 5° altitude.  Arc faintly visible on AllSky Image (bottom)

2025-01-20 02:47 UT (GMT) Increased aurora activity. Aurora rays to 12° . Hint of red aurora glow Aurora barely visible on AllSky Image (bottom)

15s frames taken with Tapo C325WB Colour Camera vs 30s wider-field exposures taken with Oculus All Sky Camera

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 Videos

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Magnetometer Stack Plots (for reference)

Magnetometer Stack Plots from Scandinavia (ordered by latitude) H Component - 2025-01-19 / 2025-01-20 Activity throughout the night, with peak activity at around 22:10 - 23:50 UT, with with other peaks around 21:00 & 00:00 UT Note: Geomagnetometer activity at rvk (Rorvik, 64.95N), dob (Dombas, 62.07N), sol (Solund, 61.08N) and kar (Karmoy, 59.21N) stations are used as indicators for potential auroral activity that may be visible from my Observatory situated at latitude 57.32N  (Map of Stations)

Graphed using 'make your own graph' facilities at  https://flux.phys.uit.no/compose/   (Tromsø Geophysical Observatory  ) Original data from Tromsø Geophysical Observatory (TGO), DTU Space (Technical University of Denmark) and Finnish Meteorological Institute (FMI) Data also displayed on SpaceWeatherLive's Europe Stackplot at  http://www.spaceweatherlive.com/en/auroral-activity/magnetometers).

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Planetary K-Index Plot (for reference)

Estimated 3 hour Planetary K-Index (NOAA)  (from http://services.swpc.noaa.gov) Planetary-k-index_2025-01-20 / 2025-01-21 Not captured

SAMNET's magnetometer at Sumburgh, Shetland  (Chart Explanation)  - Weak Magnetometer activity on the night 2025-01-20 / 2025-01-21   showing slightly raised activity between 22:00 and 23:00 UT

8-day Lerwick Observatory K Index Showing max K3 on the evening of 2025-01-10

Planetary K-Index and other information (Space Weather Prediction Centre) shows Kp3.5 on evening of 2025-01-10

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Aurora Forecast, NOAA/Ovation (for reference)

Aurora Forecast for 2025-01-20 23:53 UT (GMT) (From Space Weather Prediction Centre,  http://www.swpc.noaa.gov )

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