David's Astronomy Pages (All Sky Camera) Aurora on night  2021-04-16 /  2021-04-17

Aurora  2021-02-20

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Rocket 2021-09-27

Aurora	Notes
Pictures Videos Summary Plot Magnetometer Stack Plots (for reference) Planetary K-Index Plot (for reference) Aurora Forecast, NOAA/Ovation (for reference)	- Aurora display in NE Scotland - Activity observed from 21:15 to 01:50 UT - Peak of activity (kp4-kp5) at 21:25-21:55 UT (22:25 to 22:55 LT) - Secondary peak at 01:10 to 01:35 UT (02:10 to 02:35 LT)      - Telescope Images from 2021-04-16 >>

Pictures

Panoramic View - Northern Sky

2021-04-16 21:25 UT Auroral activity in NW-NNW sky but difficult to see in bright moonlit sky (moon:  phase 27%, altitude 21°).

2021-04-16 21:25 UT Very rapid development of auroral activity in northern sky with auroral rays up to 15-20° altitude.  Moonlit sky.

2021-04-16 21:27 UT Brightening aurora. Rays to at least 20° altitude.   Moonlit sky. Moon progressing northwards on left hand side of image

2021-04-16 21:30 UT Aurora across entire northern horizon with rays to at least 25° altitude.   Moonlit sky.

2021-04-16 21:37 UT Aurora rays traversing across northern horizon. Rays to 25° altitude.   Moonlit sky.

2021-04-16 21:50 UT Aurora rays traversing across northern horizon. Rays to 25° altitude.   Moonlit sky.

2021-04-16 22:20 UT Aurora faded but some activity still visible in NNE sky. Moonlit sky.

2021-04-16 22:24 UT Aurora faded but occasional bright rays to 15° altitude.  Moonlit sky.

2021-04-16 22:24 UT Aurora active low down on NNE horizon.  Satellite Flash in NNW sky.   Moonlight hiding activity in NW sky ?

2021-04-17 01:12 UT Aurora activity increasing again in NNW sky. Moon has now set.

2021-04-17 22:24 UT Aurora activity in NW- NNW Sky   Secondary peak with faint rays up to 10-15° altitude

30s exposures taken with Oculus All Sky Camera

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 Videos

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Night Summary Plot

Night Summary Plot - North Sky (2021-04-16 / 2021-04-17) Times on plot are local times (UT + 1h)

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Magnetometer Stack Plots (for reference)

Magnetometer Stack Plots from Scandinavia (ordered by latitude) H Component - 2021-04-16 / 2021-04-17 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)

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Aurora Forecast, NOAA/Ovation (for reference)

Aurora Forecast at 2021-04-16 22:00h UT for 22:38hUT (From Space Weather Prediction Centre,  http://www.swpc.noaa.gov )

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