David's Astronomy Pages (All Sky Camera) Aurora on night 2023-09-25 - Under Construction

Aurora  2023-09-25

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Aurora 2024-04-16

Aurora

Notes

Night Summary (Keogram) Plot 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 of 2023-10-22 / 2023-10-23 associated with Kp 3 (G0) geomagnetic conditions. Skies in NE Scotland were clear the whole night. Activity was visible from the Clair Observatory (+57N)  from 19:40 to 21:00 UT (20:40 to 21:00 LT) Observed activity comprised a weak auroral arc up to 5 -6 deg altitude,. with faint moving curtains for a brief interval . -  Scandinavia magnetometers indicate show a short but very sharp change in readings at 2023-10-22 20:00 to 20:10 UT      - Telescope Images from 2023-10-22 >>

Night Summary (Keogram) Plot

Night Summary Plot - North Sky (2023-10-22 / 2023-10-23 ) Times on plot are local times (BST  = UTC +01h ) Keogram plot affected by neighbours lights until 22:35 Aurora visible from ~ 21:00 to 21:45 LT (20:00 to 20:45 UT)

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Pictures

Panoramic View - Northern Sky - Under Construction

2023-10-22 19:35 UT (20:35 LT)  First signs of auroral activity in form of a weak auroral arc, lying close to the northen horizon

2023-10-22 19:50 UT (20:50 LT)  Continuation of weak auroral arc, lying close to the northen horizon

2023-10-22 20:00 UT (21:00 LT)  Auroral arc brightening

2023-10-22 20:02 UT (21:02 LT)  Auroral arc with faint ray (s) to 10-12 deg altitude between N and NNE

2023-10-22 20:14 UT (21:14 LT)  Auroral arc reach 7 deg altitude

2023-10-22 20:44 UT (21:44 LT)  Auroral arc barely visible.  This rougly marks the end of aurora activity for the night .

30s 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 - 2023-10-22 / 2023-10-23 Very short but sharp spike in magnetometers readings at 20:00 to 20:10 UT Original data from Tromsø Geophysical Observatory (TGO), DTU Space (Technical University of Denmark) and Finnish Meteorological Institute (FMI, displayed on SpaceWeatherLive http://www.spaceweatherlive.com/en/auroral-activity/magnetometers). 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)

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Planetary K-Index Plot (for reference)

Estimated 3 hour Planetary K-Index (NOAA) (K indices of 5 or greater indicate storm-level geomagnetic activity around earth)  (from http://services.swpc.noaa.gov) planetary-k-index_2023-10-22 / 2023-10-23 Not captured

SAMNET's magnetometer at Crooktree, Near Torphins  (Chart Explanation)  - Shows a moderate spike in activity at 20:00 UT

8-day Lerwick Observatory K Index Showing a KP 3 spike in the evening of 2023-10-22 (skies in NE Scotland were cloudy during early hours of 2023-10-23 when a KP 4 activity was recorded at Lerwick)

Planetary K-Index and other information (Space Weather Prediction Centre) shows KP Index reaching KP3 at 2023-10-22 20:00 UT.

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Aurora Forecast, NOAA/Ovation (for reference)

Aurora Forecast for 2023-10-22 20:11 UT (21:11 LT) (From Space Weather Prediction Centre,  http://www.swpc.noaa.gov )

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