David's Astronomy Pages (All Sky Camera) Aurora on night 2025-03-21 / 2025-03-22

Aurora 2025-03-19

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Aurora 2025-03-25

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)

- Auroral activity on the night 2025-03-21 / 2025-03-22 associated with period of geomagnetic activity up to KP6 (G2 Storm) Skies in NE Scotland were somewhat cloudy. (ranging from thin cloud to thick cloud at times).    Activity was visible on camera images from around 20:00 to 03:30 UT  (specifically at  20:00-20:15,  21:15 - 23:20, 01:30 - 02:15 and  03:00 - 03:30 UT), with peak activity visible at 01:45 to 02:15 UT. Display was likely partially or totally hidden by cloud at times, and at other times  weakened by the effects of thinner cloud or haze. Observed activity comprised green and violet/crimson auroral glow an occasional arc / band , occasional moving curtains and rays up to 50-60° 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 at 19:00-21:00 & 23:30-04:00 UT,  with peak activity at around 00:00 and at 01:30 to 03:00 UT.  Lerwick Magnetometer shows activity up to K7.     - Telescope Images from 2025-03-19 >> -

Night Summary (Keogram) Plot

Night Summary Plot - North Sky (2025-03-21) Times on plot are local times (GMT  = UTC +00h ) Aurora Activity visible on colour keogram at at  20:00-20:15,  21:15-23:20, 01:30-02:15 and  03:00-03:30 UT with peak activity visible at 01:45 to 02:15 UT

Night Summary Plot - North Sky (2025-03-21) Times on plot are local times (GMT  = UTC +00h ) Aurora visible on b/w keogram at  21:15-22:45 &  02:00-02:15 UT

;24Scandinavia Magnetometers vs NorthCam Keogram - 2025-03-21 / 2025-03-22

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Pictures (AllSky Camera)

Panoramic View - Northern Sky

Images showing activity 21:15 to 23:15 UT (GMT)

2025-03-21 21:24 UT (GMT) Faint green & violet auroral glow in northern sky (cloud hides aurora below 10° altitude). Sky pollution from nearby town in NNW direction.

2025-03-21 22:16 UT (GMT) Faint green & violet auroral glow with rays to 30-35° altitude (cloud hides aurora below 10° altitude)

2025-03-21 22:28 UT (GMT) Faint green & violet auroral glow with rays to 30-35° altitude (cloud hides aurora below 10° altitude) Prominant ray present in NNW direction

2025-03-21 23:08 UT (GMT) Auroral glow continuing. Crimson aurora visible to  to 20-25° altitude, but about to be covered by developing cloud

Images showing activity 01:30 to 02:30 UT (GMT)

2025-03-21 01:42 UT (GMT)  Green auroral band and diffuse curtains, partly hidden by cloud & haze

2025-03-21 01:52 UT (GMT)  Green auroral band with violet & crimson rays to 50-60° altitude Faint due to haze or thin cloud

2025-03-21 01:59 UT (GMT) Aurora activity continuing with crimson rays. Aurora appears somewhat diffuse & faint due to haze or thin cloud.

2025-03-21 02:04 UT (GMT) Aurora activity continuing with crimson rays, but might be fading ? Aurora appears somewhat diffuse & faint due to haze or thin cloud.

2025-03-21 02:08 UT (GMT) Aurora display fading, and is becoming obscured by mist or cloud

2025-03-21 02:12 UT (GMT) Activity likely to be continuing but aurora have become obscured by haze or cloud

2025-03-21 03:15 UT (GMT)  .Activity evidentally continuing, with diffuse crimson aurora colours reappearing where clouds thin

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 - 2025-03-21 / 2025-03-22 Activity at 19:00-21:00 & 23:30-04:00 UT.  Peak activity appears to have been at around 00:00 and 01:30 to 03:00 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_2025-03-21 / 2025-03-22 Not captured

SAMNET's magnetometer at Sumburgh, Shetland  (Chart Explanation)  - Geomagnetic activity on the night 2025-03-21 / 2025-03-22  Plot shows early moderate activity at 19:00-21:00 UT & 23:00 - 00:00 UT followed by strong activity at 01:00 to 04:00 UT

8-day Lerwick Observatory K Index Showing max K7 on the evening of 2025-03-21 / 2025-03-22

Planetary K-Index and other information (Space Weather Prediction Centre) shows Kp6 on night of 2025-03-21 / 2025-03-22

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Aurora Forecast, NOAA/Ovation (for reference)

Aurora Forecast for 2025-03-22 01:44 UT (GMT) (From Space Weather Prediction Centre,  http://www.swpc.noaa.gov )

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