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Stargazing For those aurora chasers -- a heads up

  1. Sep 9, 2017 #21
    Thanks also for the sources.
    This recent activity was/is perhaps a last break out before final down hill ...

    Edit update note:
    On editing this, just a few minutes ago, another strong M3.79 flare from sunspot region 2673. So hopes for more aurora in a couple of days (max 3) !
     
    Last edited: Sep 9, 2017
  2. Sep 10, 2017 #22

    davenn

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    not likely .... see my comment in your thread :wink:
     
  3. Sep 11, 2017 #23
  4. Sep 12, 2017 #24
    (From spaceweather.com)

    "CME ARRIVES, SPARKS MINOR STORM:Arriving earlier than expected, the flank of a CME hit Earth's magnetic field on Sept. 12th (~20:00 UT), and the impact has sparked a minor G1-class geomagnetic storm. Shortly after the CME's arrival, Natalia Robba photographed an outburst of auroras over Kalfafell, Iceland:

    iceland_strip.jpg

    "We were on the lookout for the CME," says Robba. "We got some lovely coronas directly overhead, and lots of activity all over the sky. It didn't hold for long but it was just beautiful!"

    NOAA forecasters say the storm could intensify to G2-class on Sept. 13th when a solar wind stream unrelated to the CME arrives. If so, auroras in the USA could appear as low as New York to Wisconsin to Washington state."
     
  5. Sep 14, 2017 #25

    davenn

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    No, there will still be lots of aurora to view. only a small number of aurora and usually the larger ones are spawned by solar flares
    some 95% or more are caused by material spewed out by coronal holes. These are occurring on a regular basis and many coronal holes last more than one solar rotation meaning that we can see regular activity month after month of rotations.


    Dave
     
  6. Sep 14, 2017 #26

    davenn

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    Heads up for minor auroral activity 15 - 16th Sept

    A recurrent coronal hole is causing unsettled to active geomagnetic conditions
    This will produce some auroral activity in the higher latitudes. And now that the moon is out of the evening sky
    seeing the fainter aurora will be less of an issue


    Dave
     
  7. Sep 14, 2017 #27
    Space Weather News for Sept. 14, 2017
    http://spaceweather.com
    https://www.facebook.com/spaceweatherdotcom

    "SOLAR WIND SPARKS GEOMAGNETIC STORM: Earth is entering a stream of high-speed solar wind flowing from a hole in the sun's atmosphere. First contact with the stream on Sept. 14th produced a moderately strong (G2-class) geomagnetic storm, ongoing at the time of this alert. If the storm continues, high-latitude sky watchers could see auroras after local nightfall on Sept. 14/15. Visit Spaceweather.com for more information and updates."
     
    Last edited: Sep 14, 2017
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