David's Astronomy Pages (All Sky Camera) Aurora on night 2025-01-10 / 2025-01-11

Aurora 2025-01-04

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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 2025-01-10 / 2025-01-11 associated with geomagnetic activity up to KP3. Skies in NE Scotland were generally clear.    Weak activity was visible on camera images from the Clair Observatory (+57N) against a bright moonlit sky at around 21:00 to 21:15 and 22:30 to 00:15 UT; a total period of 3.25 hours. Observed activity comprised weak auroral arc to 6° and moving curtains along the northern horizon, with rare rays to 13-15° altitude. 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 between 19:30 & 00:30 UT, with peak activity at around 22:30  - 23:30 UT     - Telescope Images from 2025-01-10 >>

Night Summary (Keogram) Plot

Night Summary Plot - North Sky (2025-01-10) 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 (2025-01-10) 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 - 2025-01-10

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Pictures (AllSky Camera)

Panoramic View - Northern Sky

2025-01-10 22:29 UT (GMT) Double auroral arc to 4° and to 6-7° altitude.   Barely detectable on All-Sky Camera Artifact on AllSky Camera in NNE direction is due to moon to rear (bottom picture)

2025-01-10 22:54 UT (GMT) Auroral arc to 4-5° altitude. Short-lived ray in NNW direction to 13-15° altitude.   Barely detectable on All-Sky Camera Artifact on AllSky Camera in NNE direction is due to moon to rear (bottom picture)

2025-01-10 23:44 UT (GMT) Auroral arc to 5° altitude. Curtains developing Artifact on AllSky Camera in NE direction is due to moon (bottom picture)

2025-01-10 23:58 UT (GMT) Weak aurora arc to 5° altitude, bright green curtain in N-NNE direction, barely detectable on AllSky Camera View (bottom) Top picture is original picture from Tapo Camera via iSpy, showing bright moon lit sky Middle picture (darkened) is processed with a 0.35 gamma correction.

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 - 2025-01-10 / 2025-01-11 Activity shown from 19:30 to 00:30 UT, with peak activity at around 22:30  - 23:30 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_2025-01-10 / 2025-01-11 Not captured

SAMNET's magnetometer at Sumburgh, Shetland  (Chart Explanation)  - Magnetometer activity on the night 2025-01-10 / 2025-01-11   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 2025-01-10 23:53 UT (GMT) (From Space Weather Prediction Centre,  http://www.swpc.noaa.gov )

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