David's Astronomy Pages (All Sky Camera) Aurora on night 2024-08-27 / 2024-08-28

Aurora  2024-05-10

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Aurora 2024-08-28

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)

- Auroral activity on the night of 2024-08-27 / 2024-08-28 that was associated with Kp 5.5 / KP 6 (G1/G2) geomagnetic conditions.caused by the arrival of a CME on 2024-08-27. Skies in NE Scotland were clear and saw most of the auroral display. Activity was visible from the Clair Observatory (+57N)  from 2024-08-27 21:30 to 02:50 UT (22:30 to 03:50 LT) Observed activity comprised an auroral arc up to 15° altitude, moving curtains and rays up to 35-40°.; Scandinavia magnetometers indicate show activity in magnetometers readings from 21:00 to 04:00 UT SpaceWeather.com reported that "a seemingly feeble CME hit Earth's magnetic field on Aug 27th. At first, nothing happened. Then, on Aug 28th, Earth encountered the CME's tail and a G2-class storm erupted. The storm and light show occured more than 10 hours after the CME arrived. At the time, Earth was deep inside the CME's tail--a magnetized structure trailing the CME itself. Magnetic fields within the tail unexpectedly connected to our planet's magnetosphere. The storm commenced and auroras were sighted across Europe and the USA as far south as latitude +41N" (see SpaceWeather page for 2024-08-29) -         - Telescope Images from night 2024-08-27 >>

Night Summary (Keogram) Plot

Night Summary Plot - North Sky (2024-08-27 ) Times on plot are local times (BST  = UTC +01h ) Keogram plot affected by cloud Aurora visible on keogram at 23:15 to 03:50 LT (22:15  to 02:50 UT)   Strongest/Brightest aruora was at around 02:00 LT (01:00 UT), with another peak of activity around 03:20 LT (02:20 UT)

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Pictures

Panoramic View - Northern Sky

2024-08-27 21:33 UT (22:33 LT)  First signs of auroral activity in form of weak rays to 15° altitude

2024-08-27 21:51 UT (22:51 LT)  Weak rays along NNW horizon.   Meteor in NNW sky, 32-35° altitude

2024-08-27 22:20 UT (23:20 LT)  Bright Satellite Flash (or Meteor ?) in NNW sky,  25° altitude Very faint auroral arc developing

2024-08-27 22:30 UT (23:30 LT)  Faint auroral arc appearing (up to 6° altitude)

2024-08-27 22:53 UT (23:53 LT)  Faint arc with rays to 15-20° altitude. Moon rising in NE.

2024-08-27 23:25 UT (00:25 LT)  Faint arc to 8° altitude. Moon (33% phase) rising in NE Sky.

2024-08-28 00:12 UT (01:12 LT)  Auroral arc to 9-10 altitude° in northern sky.  Moon.(33% phase) at 14° altitude

2024-08-28 00:39 UT (01:39 LT)  Auroral arc to 10° altitude. Curtains developing

2024-08-28 00:49 UT (01:49 LT)  Auroral arc brightening, Prominent set of rays developing in NW Sky to 20° altitude

2024-08-28 00:50 UT (01:50 LT)  Rays climbing to 35° altitude in NNW sky (Image is just 30s after the one above)

2024-08-28 00:53 UT (01:53 LT)  Auroral arc up to 15° brigtnening with rays up to 30-40° altitude. Distinct curtain in N-NNE direction

2024-08-28 00:59 UT (01:59 LT)  Semi-choatic auroral activity om NW to N direction,  Rays up to 40° altitude in NNE-ENE direction

2024-08-28 00:59 UT (01:59 LT)  Rays developing in NNW-N direction, up to 25° altitude. Rays continuing on NNE-NE direction, up to 30° altitude

2024-08-28 01:11 UT (02:11 LT)  Activity weakening overall, but rays continuing in NNW-NNE sky.

2024-08-28 01:13 UT (02:13 LT)  Rays along northern horizon up to 25° altitude.

2024-08-28 01:14 UT (02:14 LT)  Bright rays in north up to 30° altitude.

2024-08-28 01:20 UT (02:20 LT)  Weakening in activity, some indiction of rays n NNE direction up to 10-15° altitude.

2024-08-28 01:36 UT (02:36 LT)  Slight resurgance in activity wit rays to 25-30° altitude. Cloud developing along northern horizon.  Moon (32% phase) at 25° altitude in eastern sky.

2024-08-28 01:37 UT (02:37 LT)  Rays moving along northern horizon to  to 25-30° altitude. Bright ray in NNE sky.

2024-08-28 01:37 UT (02:37 LT)  Aurora arc to 9° altitude with weak curtains

2024-08-28 02:13 UT (03:13 LT)  Aurora activity brightening again, auroral arc to 10-11° altitude with weak curtains

2024-08-28 02:19 UT (03:19 LT)  Auroral arc to 12° altitude with distinct rays up to 30° altitude in N-NE sky

2024-08-28 02:30 UT (03:30 LT)  Auroral activity significantly weakened, but still some traces of ray to 15-20° altitude

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 - 2024-08-27 / 2024-08-28 Activity in magnetometers readings at 21:00 to 04:00 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)  (from http://services.swpc.noaa.gov) Planetary-k-index_2024-04-30 / 2024-05-01 Not captured

SAMNET's magnetometer at Crooktree, Near Torphins  (Chart Explanation)  - Shows a large spikes in activity at 2024-08-28 00:00 UT, lasting up to 03:00 UT

8-day Lerwick Observatory K Index Showing a KP 6 (G2) spike in the night of 2024-08-27 / 2024-08-28

Planetary K-Index and other information (Space Weather Prediction Centre) shows KP Index reaching KP5.5 in night of 2024-08-27 / 2024-08-28

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Aurora Forecast, NOAA/Ovation (for reference)

Aurora Forecast for 2024-08-28 01:11 UT (02:11 LT) (From Space Weather Prediction Centre,  http://www.swpc.noaa.gov )

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