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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.


846 topics in this forum

    • 2 replies
    • 759 views
    • 1 reply
    • 152 views
  1. AR 3536 1 2 3 4 12

    • 298 replies
    • 29k views
    • 7 replies
    • 1.9k views
  2. AR 3538 1 2

    • 30 replies
    • 2.4k views
  3. AR3440

    • 22 replies
    • 2.1k views
    • 115 replies
    • 19.4k views
    • 20 replies
    • 2k views
  4. Solar eclipse april 2024

    • 8 replies
    • 1.1k views
  5. AR 3529 1 2 3

    • 55 replies
    • 4.6k views
  6. Region 3530

    • 3 replies
    • 415 views
    • 8 replies
    • 801 views
  7. AR3528

    • 21 replies
    • 1.2k views
  8. AR 3521

    • 10 replies
    • 641 views
  9. Region 3519

    • 4 replies
    • 654 views
    • 9 replies
    • 2.1k views
  10. AR3516

    • 4 replies
    • 1.4k views
  11. Region 3514 1 2 3 4 7

    • 162 replies
    • 17.6k views
    • 30 replies
    • 3.9k views
  12. Sunspot AR3474

    • 5 replies
    • 767 views
  13. AR 3511 1 2

    • 29 replies
    • 2.3k views
  14. AR 13513

    • 21 replies
    • 1.8k views
    • 10 replies
    • 955 views
  15. AR 3500 1 2 3 4 5

    • 109 replies
    • 15.6k views
  16. AR 3486

    • 13 replies
    • 1.2k views
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