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Solar activity

Sunspot regions, coronal holes, filaments? In this forum we discuss everything related to the activity on our nearest star.

Solar activity forum rules - Let's keep things tidy!

1. Want to talk about a sunspot region? Feel free to make a topic! Keep the title clean and simple! For example: Sunspot region 1234, or AR1234.
2. Want to discuss a solar flare? Do not make a new topic! Post in the existing topic for that sunspot region or make a new topic if the sunspot region in question does not have a topic yet!
3. Solar flares and sunspot regions on the east limb that are not numbered yet are discussed in this topic.
4. Returning active region? Make a new topic with the current sunspot region number. Do not revive the old topic for that sunspot region!
5. Want to talk about coronal holes? There is a dedicated topic for that. Do not post a new topic.
6. Want to talk about filaments? There is a dedicated topic for that. Do not post a new topic.
7. Discussions about possible earth-directed coronal mass ejections and the geomagnetic storm that it might cause go in the geomagnetic activity forum.

857 topics in this forum

  1. Incoming Regions (de-commissioned) 1 2 3 4 55

    By MinYoongi,
    • 1.4k replies
    • 146.2k views

  2. Region 3590 1 2 3 4 27

    By Ingolf,
    • 668 replies
    • 88.2k views

  3. Growth of Cycle 25 1 2 3 4 18

    By 3gMike,
    • 432 replies
    • 63.5k views

  4. Region 3576 1 2 3 4 25

    By Jesterface23,
    • 611 replies
    • 58.8k views

  5. Filaments (de-commissioned) 1 2 3 4 23

    By MinYoongi,
    • 567 replies
    • 58.8k views

  6. AR3615 1 2 3 4 20

    By Wolf star,
    • 495 replies
    • 54.9k views

  7. Southern field close to flipping? 1 2 3 4 13

    By Patrick P.A. Geryl,
    • 324 replies
    • 47.6k views

  8. AR 13229, X2.28 flare! 1 2 3 4 15

    By MinYoongi,
    • 370 replies
    • 39.2k views

  9. AR2993/2994: X flare! 1 2 3 4 31

    By Solarflaretracker200,
    • 772 replies
    • 38.8k views

  10. Is the sun abnormally bright at the moment? 1 2

    By theta,   
    • 48 replies
    • 34.2k views

  11. Incoming Active Regions 1 2 3 4 10

    By Marcel de Bont,
    • 229 replies
    • 31.3k views

  12. AR2887 X flare and CME 1 2 3 4 12

    By Drax Spacex,   
    • 280 replies
    • 29.6k views

  13. AR 3536 1 2 3 4 12

    By Solar_Marcel,
    • 298 replies
    • 29.4k views

  14. AR2975, M9 flare 1 2 3 4 21

    By Sam Warfel,
    • 501 replies
    • 29.1k views

  15. Active Region 1944 - (X1.2) 1 2

    By Vancanneyt Sander,
    • 41 replies
    • 27.5k views

  16. New NASA prediction 1 2 3 4 5

    By Patrick P.A. Geryl,
    • 115 replies
    • 19.7k views

  17. AR 13296 1 2 3 4 12

    By Philalethes,
    • 288 replies
    • 19.3k views

  18. Solar Cycle 25 has already "started". 1 2

    By theartist,
    • 33 replies
    • 19.1k views

  19. AR 3575 1 2 3 4 10

    By tniickck,
    • 238 replies
    • 17.9k views

  20. Region 3514 1 2 3 4 7

    By MinYoongi,
    • 162 replies
    • 17.7k views

  21. are we going to be in for a treat in about a week? 1 2 3 4 11

    By farm24,
    • 259 replies
    • 17.4k views

  22. AR 3354 1 2 3 4 6

    By Jesterface23,
    • 146 replies
    • 17.2k views

  23. AR 3500 1 2 3 4 5

    By tniickck,
    • 109 replies
    • 15.7k views

  24. Flares, Longitudes, and Limbs (oh my!) 1 2

    By Drax Spacex,   
    • 31 replies
    • 15.2k views

  25. Active Region 1748 - (X1.7, X2.8, X3.2 & X1.2)

    By Vancanneyt Sander,
    • 15 replies
    • 14.9k views
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