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Stargazing Sunspots visible for 2 Sept 2017

  1. Sep 1, 2017 #1

    davenn

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    A quick shot of the sun this morning
    Nth lower left, East limb lower right

    400mm telephoto = x2 teleconverter, 500th sec, f11

    IMG_0941.jpg
     
    Last edited: Sep 4, 2017
  2. jcsd
  3. Sep 1, 2017 #2

    Drakkith

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    Very nice! I'm guessing that big sunspot is probably larger than the Earth?

    Nth = North?

    What kind of filter do you have on your camera?
     
  4. Sep 1, 2017 #3

    davenn

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    I haven't seen any specific comments but would also guess about the same size to a bit bigger

    yup .... my usual abbreviation

    nth, sth ..... :smile:

    this .....

    2015_03_14_3302sm.jpg

    http://www.telescope.com/Accessorie...lescope-Solar-Filters/pc/-1/c/3/sc/48/e/4.uts

    That's the 100 - 400 mm lens with a 2 x adaptor on it
     
  5. Sep 2, 2017 #4
    A labeled image from about the same time that shows the scale of Earth and Jupiter.

    mdi_sunspots.jpg
     
  6. Sep 4, 2017 #5

    davenn

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    The large group continues across the sun
    there has been new spots appear to the east of this long string of spots plus a new set coming around the east limb

    4th Sept 2017
    400mm telephoto = x2 teleconverter, 500th sec, f11
    rotation is from lower right to upper left ( as seen through my camera)

    You can also see the smaller single spot up from the large spot chain has also evolved into a much more complex structure over the last 24 - 48 hrs
    you can view this animation ( Note, the image source has corrected image orientation) .....

    http://www.spaceweather.com/images2...anim.gif?PHPSESSID=0u7620108s1at1gnt6ilu816i5

    There have so far been 3 M class flares recorded. Not sure which group they originated in ?



    IMG_0946sm.jpg

    Dave
     
    Last edited: Sep 4, 2017
  7. Sep 5, 2017 #6

    davenn

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    The Sun

    4th Sept 2017
    400mm telephoto = x2 teleconverter, 500th sec, f11
    rotation is from upper right to lower left ( as seen through my camera)

    The upper group continues to grow in size and complexity and it is also becoming more active

    IMG_0947sm.jpg


    Quite a number of solar flares have occurred over the last 24 - 36 hrs. Both spot numbers and flare count
    is the highest it's been for many month

    Approximate Flare Maximum: 04-09-2017 0549 UT at Flux M 1.3
    Approximate Flare Maximum: 04-09-2017 1531 UT at Flux M 1.5
    Approximate Flare Maximum: 04-09-2017 1822 UT at Flux M 1.0
    Approximate Flare Maximum: 04-09-2017 2033 UT at Flux M 5.5
    Approximate Flare Maximum: 05-09-2017 0108 UT at Flux M 4.2
    Approximate Flare Maximum: 05-09-2017 0351 UT at Flux M 1.0
    Approximate Flare Maximum: 05-09-2017 0453 UT at Flux M 3.2
    Approximate Flare Maximum: 05-09-2017 0640 UT at Flux M 3.8


    cheers
    Dave
     
    Last edited: Sep 5, 2017
  8. Sep 6, 2017 #7

    davenn

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    The Sun today -- 6 Sept 2017

    2 large spot groups continue to dominate the solar disk

    IMG_0953.jpg
     
  9. Sep 6, 2017 #8
    The Sun has been quite active today- 2 X class flares since 0900UT.

    goes-xray-flux-6-hour.gif

    My reaction when I first saw this is unprintable here!
     
  10. Sep 6, 2017 #9

    davenn

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    Only one X class is listed, an X9.3 which is huge !!

    that other one after 0900 UT was a M7.7


    Dave
     
  11. Sep 6, 2017 #10
    The plot indicates that the 0900UT event was in the X1 - X2 range.
     
  12. Sep 6, 2017 #11

    davenn

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    it's been officially listed as a M7.7 :smile:
     
  13. Sep 6, 2017 #12
    Excellent photography in this thread! Regarding the two dominant spot groups (AR2674 and 2673), here is an interesting short video:

    Also, regarding the monster X-class flares (just today 6 Sept), here is another one:
     
  14. Sep 6, 2017 #13
    Not trying to be contrary, but these 2 lines are from the Space Weather Prediction Center's Edited Events list for today- they show the events as x2.2 and X9.3

    Code (Text):

    #Event    Begin    Max       End  Obs  Q  Type  Loc/Frq   Particulars       Reg#
    #-------------------------------------------------------------------------------
    7250       0857   0910      0917  G13  5   XRA  1-8A      X2.2    1.3E-01   2673

    7340 +     1153   1202      1210  G15  5   XRA  1-8A      X9.3    5.7E-01   2673
     
    The full file is available at - Edited Events for 2017 Sep 06
     
  15. Sep 6, 2017 #14
    And the videos from NASA initially mentioned X2.2 and X9.3 ... but that may have changed later (?) ...

    Also, here comes the CME ... (announced just over an hour ago):
    "Latest news
    303-thumb.jpg
    Wednesday, 6 September 2017 - 21:09 UTC
    X9.3 earth-directed coronal mass ejection
    More news"
     
    Last edited: Sep 6, 2017
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