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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.

858 topics in this forum

  1. Steady S2 Rad Storm

    By Christopher Shriver,
    • 11 replies
    • 911 views

  2. Let’s Play a Game -> show me the deltas! 1 2 3 4

    By WildWill,
    • 76 replies
    • 9.1k views

  3. AR3613 - Do sunspots move faster (or slower) than local material?

    By IDNeon,
    • 2 replies
    • 253 views

  4. Region 3612

    By Jesterface23,
    • 1 reply
    • 392 views

  5. Region 3590 1 2 3 4 27

    By Ingolf,
    • 668 replies
    • 88.2k views

  6. Region 3599 1 2 3 4

    By MeteoLatvia,
    • 77 replies
    • 11.8k views

  7. Powerful CME

    By Sieffre Involution,
    • 10 replies
    • 2.1k views

  8. AR 3590

    By Sayv678,
    • 5 replies
    • 775 views

  9. Sunspot region photos

    By Jay-B,
    • 5 replies
    • 684 views

  10. Explanation what we see here

    By andreas.luemkemann,
    • 5 replies
    • 1.1k views

  11. understanding sun stats

    By Ash Le Cras,
    • 2 replies
    • 9.1k views

  12. Region 3598

    By hamateur 1953,
    • 5 replies
    • 675 views

  13. The longest flare on record

    By Ester89,
    • 15 replies
    • 3k views

  14. Reverse flares?

    By Jay-B,
    • 13 replies
    • 925 views

  15. Region 3576 1 2 3 4 25

    By Jesterface23,
    • 611 replies
    • 58.8k views

  16. AR 13597

    By Philalethes,
    • 2 replies
    • 394 views

  17. AR 3595

    By Solar_Marcel,   
    • 4 replies
    • 1.1k views

  18. Region 3596

    By hamateur 1953,
    • 6 replies
    • 898 views

  19. Given an X flare, probability of an associated CME?

    By Drax Spacex,
    • 16 replies
    • 1.9k views

  20. Most x flares

    By raekje33,
    • 3 replies
    • 1.2k views

  21. Region 3583 1 2

    By Miles,
    • 25 replies
    • 1.8k views

  22. Strong far side CME 1 2 3 4 5

    By MinYoongi,
    • 111 replies
    • 11k views

  23. Topics about flares and sunspot regions. What do you think?

    By Marcel de Bont,
    • 12 replies
    • 560 views

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

    By MinYoongi,
    • 567 replies
    • 58.8k views

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

    By MinYoongi,
    • 1.4k replies
    • 146.2k views
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