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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

  1. AR3615 1 2 3 4 19

    • 469 replies
    • 47.5k views
    • 49 replies
    • 5.8k views
  2. AR 3614 1 2 3 4

    • 81 replies
    • 8.1k views
    • 9 replies
    • 937 views
    • 1 reply
    • 392 views
    • 11 replies
    • 850 views
    • 76 replies
    • 9k views
    • 155 replies
    • 22.4k views
    • 2 replies
    • 216 views
    • 1 reply
    • 371 views
    • 4 replies
    • 862 views
  3. Region 3590 1 2 3 4 27

    • 669 replies
    • 87k views
    • 77 replies
    • 11.6k views
    • 10 replies
    • 2k views
  4. Growth of Cycle 25 1 2 3 4 14

    • 344 replies
    • 52.1k views
  5. AR 3590

    • 5 replies
    • 704 views
    • 5 replies
    • 647 views
    • 5 replies
    • 1k views
    • 2 replies
    • 9.1k views
    • 5 replies
    • 647 views
    • 15 replies
    • 2.9k views
  6. Reverse flares?

    • 13 replies
    • 880 views
    • 612 replies
    • 58.2k views
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