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  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL

    Observed Flux Density 69.7 sfu, Adjusted flux density 70.3 sfu

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    Just a few pics from early this morning at West Sands, St. Andrews  First one was 100iso eq @ f1.8 and 10 sec exposure, strong moonlight about midnight with the faintest of hint of an aurora.

    More shots here from Scotland last night. Fingers crossed again tonight as there is another predicted Kp7 ☺

    From Salon on the Isle Of Rum & The Isle Of Lewis tonight. Credit; Martin Keivers and Emma Mitchell.  

    Posted Images

    Posted
  • Location: Weston-S-Mare North Somerset
  • Weather Preferences: Hot sunny , cold and snowy, thunderstorms
  • Location: Weston-S-Mare North Somerset

    16 days blank,  86 for 2020, 77%

    Solar flux 68

    Thermosphere: 3.38

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL

    Observed Flux Density 68.5, Adjusted flux density 69.2

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    Posted
  • Location: South Ockendon, Thurrock, SW Essex
  • Weather Preferences: Severe frosts, Heavy snowfall, Thunder and lightning, Stormy weather
  • Location: South Ockendon, Thurrock, SW Essex

    SURPRISE GEOMAGNETIC STORM: The first geomagnetic storm of 2020 (category G1) took forecasters by surprise on April 20th when a CME hit Earth's magnetic field, sparking bright auroras over Canada and some northern-tier US states. "Northern lights danced across the entire northwestern Montana sky early this morning," reports Philip Granrud. "I photographed them with a wide angle lens on top of my car several miles outside of Kalispell."

    kalispell_strip Aurora.jpg

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL

    Observed Flux Density 70.2

    Adjusted Flux Density 70.9

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    Posted
  • Location: Weston-S-Mare North Somerset
  • Weather Preferences: Hot sunny , cold and snowy, thunderstorms
  • Location: Weston-S-Mare North Somerset

    17 days blank,  87 for 2020, 77%

    Solar flux 69

    Thermosphere 3.53

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL

    Observed Flux Density 69.6

    Adjusted Flux Density 70.3

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL

    Observed Flux Density 70.7

    Adjusted Flux Density 71.5

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    Posted
  • Location: Weston-S-Mare North Somerset
  • Weather Preferences: Hot sunny , cold and snowy, thunderstorms
  • Location: Weston-S-Mare North Somerset

    18 days blank,  88 for 2020, 77%

    Solar flux 71

    Thermosphere: 3.45

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL

    Observed flux density 68.7

    Adjusted flux density 69.5

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    Posted
  • Location: Weston-S-Mare North Somerset
  • Weather Preferences: Hot sunny , cold and snowy, thunderstorms
  • Location: Weston-S-Mare North Somerset

    19 days blank,  89 for 2020, 77%

    Solar flux 69

    Thermosphere: 3.46

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    Posted
  • Location: Rotherhithe, 5.8M ASL
  • Location: Rotherhithe, 5.8M ASL
    19 hours ago, JeffC said:

    Observed flux density 68.7

    Adjusted flux density 69.5

    I keep seeing these kind of posts but to casual reader they’re meaningless I have no idea what they mean also can you put it as low, medium or high to make it more understandable. It really offers no insight to anyone copying what you see off website. 

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    Posted
  • Location: Leeds/Bradford border, 185 metres above sea level, around 600 feet
  • Location: Leeds/Bradford border, 185 metres above sea level, around 600 feet
    3 hours ago, Daniel* said:

    I keep seeing these kind of posts but to casual reader they’re meaningless I have no idea what they mean also can you put it as low, medium or high to make it more understandable. It really offers no insight to anyone copying what you see off website. 

    Flux below 70 is very low.

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  • Location: Weston-S-Mare North Somerset
  • Weather Preferences: Hot sunny , cold and snowy, thunderstorms
  • Location: Weston-S-Mare North Somerset

    20 days blank,  90 for 2020, 78%

    Solar flux 71

    Thermosphere: 3.43

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    Posted
  • Location: South Ockendon, Thurrock, SW Essex
  • Weather Preferences: Severe frosts, Heavy snowfall, Thunder and lightning, Stormy weather
  • Location: South Ockendon, Thurrock, SW Essex

    AURORAS VS. TWILIGHT: It's that time of year. Arctic auroras are disappearing--swallowed by the waxing glow of the summer sun. "Time is running out for the auroras as bright summer nights take over here in the North," says Thomas Kast of Oulu, Finland. "Last night (April 26th) I might have seen the last auroras of the season."

    lastauroras_strip Auroras versus Twilight.jpg

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    Posted
  • Location: Near King's Lynn 13.68m ASL
  • Weather Preferences: Hoar Frost, Snow, Misty Autumn mornings
  • Location: Near King's Lynn 13.68m ASL
    On 24/04/2020 at 19:17, Daniel* said:

    I keep seeing these kind of posts but to casual reader they’re meaningless I have no idea what they mean also can you put it as low, medium or high to make it more understandable. It really offers no insight to anyone copying what you see off website. 

    Solar flux is an excellent measure of solar activity:

    AGUPUBS.ONLINELIBRARY.WILEY.COM

     

     

    There are 2 numbers: the observed and the adjusted.

    The observed is the actual flux density hitting the Earth's atmosphere. If you are a ham radio enthusiast, then that's the number you are interested in (the higher the better). 

    The adjusted number accounts for the varying distance of the Earth from the Sun. If you are interested in comparing the solar activity in June with the solar activity in December, then you must use the adjusted value for it to make sense.

    Anything around 70 or below indicates minimal solar activity.

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  • Location: Leeds/Bradford border, 185 metres above sea level, around 600 feet
  • Location: Leeds/Bradford border, 185 metres above sea level, around 600 feet

    Sadly the streak was broken by a solar cycle 24 sunspot.

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL
    On ‎24‎/‎04‎/‎2020 at 19:17, Daniel* said:

    I keep seeing these kind of posts but to casual reader they’re meaningless I have no idea what they mean also can you put it as low, medium or high to make it more understandable. It really offers no insight to anyone copying what you see off website. 

    Thanks for your comments Daniel*  - apologies, being a relative newcomer to the weather scene, having only been taking notice as such and trying to learn for around 10 years or so, I always assume everyone else on the forums knows more than I do and therefore gets the context, probably better than I do. I grant you that posting the info from another website is easy, and context is key, however I post this to give an insight to save others the bother of looking it up. I feel that having the context of the adjusted flux to compare with previous data as opposed to solely observed is useful because it indicates a waxing or waning of solar activity. Admittedly at the relatively low continuing levels it's at now, the differences are very modest. I haven't been looking at this data long enough to know if that modest difference is reflected higher up the solar activity chart.

    I could put something along the lines of "Values range from 67 sfu (when the sun shows no sunspots) to 300 sfu, but bursts can be much higher. The record is 55,000 sfu, recorded on 6 June 1991"  courtesy of

    WWW.SIZES.COM

    Definition of the solar flux unit.

    I'll try to work out what exactly what parameters we can put for Very low, low, medium, high and very high - let's say below 70 = v low, 70-100 = low, 100-200 medium; 2-300 = high 3-500= V high and the 55,000 if it ever gets to that again in our lifetime we'll just call it extreme?

    Does that make sense? does anyone else have an alternative existing system?

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL
    12 hours ago, summer blizzard said:

    Sadly the streak was broken by a solar cycle 24 sunspot.

    Can we say we've not yet reached absolute minimum?

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL

    Observed Flux Density 69.9

    Adjusted flux density 71.0

    =low

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL

    Observed Flux Density 69.4

    Adjusted flux density 70.4 = low

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    Posted
  • Location: South Ockendon, Thurrock, SW Essex
  • Weather Preferences: Severe frosts, Heavy snowfall, Thunder and lightning, Stormy weather
  • Location: South Ockendon, Thurrock, SW Essex

    Solar Activity Report from Solarham.net

     

    solarcycle24.php Solarham.net.gif

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    Posted
  • Location: Weston-S-Mare North Somerset
  • Weather Preferences: Hot sunny , cold and snowy, thunderstorms
  • Location: Weston-S-Mare North Somerset

    1 day blank,  91 for 2020, 74%

    Solar flux 70

    Thermosphere: 3.36

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    Posted
  • Location: Coniston, Cumbria 90m ASL
  • Weather Preferences: wintry
  • Location: Coniston, Cumbria 90m ASL

    Observed Flux Density 69.2

    Adjusted flux density 70.3 = low

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  • Location: Weston-S-Mare North Somerset
  • Weather Preferences: Hot sunny , cold and snowy, thunderstorms
  • Location: Weston-S-Mare North Somerset

    2 days blank,  92 for 2020, 74%

    Solar flux 69

    Thermosphere: 3.36

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