David's Astronomy Pages (All Sky Camera) Aurora on night 2025-01-21 / 2025-01-22

Aurora 2025-01-19

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Aurora 2025-01-21

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 2025-01-21 / 2025-01-22 associated with geomagnetic activity up to KP3-KP4. Skies in NE Scotland were generally clear but with passing cloud.    Weak activity was visible on camera images  21:00 to 02:40 UT. Peak activity at around 23:15 to 01:20 UT. Observed activity comprised weak auroral glow an occasional arc to 6° and occasional moving curtains and rays to 12° altitude.  It is possible that activity was stronger at around 19:00 ( corresponding to Scandinavian magnetometer peak acivity) but north skies were hidden by cloud at this time. 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 (2025-01-21) 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 (2025-01-21) 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) - Under construction

Panoramic View - Northern Sky

2025-01-21 21:18 UT (GMT) Faint green aurora glow along along nothern horizon

2025-01-21 23:07 UT (GMT) Brightening and widening of auroral arc Only faintly visible on AllSky Images (bottom)

2025-01-21 23:14 -23:15 UT (GMT) Rapidl moving auroral rays and curtains, hint of red glow at top of rays

2025-01-21 23:53 UT (GMT) Increased aurora activity. Aurora arc to 5° altitude. Aurora rays to 10° . Hint of red aurora glow (10-12°)

2025-01-22 00:19 UT (GMT) Continuing aurora activity with rays (green & red) in N direction

2025-01-22 00:56 UT (GMT) Aurora rays in NW-N direction, overlain by faint red glow to 15° altitude.

2025-01-22 01:08 UT (GMT) Bright ray in N direction (green paasing upwards into red)

2025-01-22 01:55 UT (GMT) Gradually decreasing activity. Aurora in NW to NNE directions

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

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 Videos  - Under construction

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Magnetometer Stack Plots (for reference)

Magnetometer Stack Plots from Scandinavia (ordered by latitude) H Component - 2025-01-21 / 2025-01-22 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_2025-01-21 / 2025-01-22 Not captured

SAMNET's magnetometer at Sumburgh, Shetland  (Chart Explanation)  - Weak Magnetometer activity on the night 2025-01-21 / 2025-01-22   showing slightly raised acivity at 18:00 to 00:00 with peak at 19:00-20:00.

8-day Lerwick Observatory K Index Showing max K3 on the evening of 2025-01-21

Planetary K-Index and other information (Space Weather Prediction Centre) shows Kp3 on evening of 2025-01-21

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Aurora Forecast, NOAA/Ovation (for reference)

Aurora Forecast for 2025-01-21 22:43 UT (GMT) (From Space Weather Prediction Centre,  http://www.swpc.noaa.gov )

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