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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.


878 topics in this forum

  1. AR 3691 1 2

    • 27 replies
    • 4.3k views
    • 8 replies
    • 1.6k views
  2. AR 3697 1 2 3 4 7

    • 154 replies
    • 18.2k views
  3. Growth of Cycle 25 1 2 3 4 18

    • 440 replies
    • 68.7k views
    • 143 replies
    • 16.9k views
    • 459 replies
    • 99.4k views
  4. AR 3679 1 2

    • 26 replies
    • 2.4k views
    • 11 replies
    • 170.5k views
  5. AR3664 1 2 3 4 46

    • 1.1k replies
    • 132k views
  6. AR3685 1 2 3 4

    • 82 replies
    • 12.6k views
    • 252 replies
    • 26.5k views
    • 1 reply
    • 224 views
  7. Latest SC25 Predictions 1 2 3 4 6

    • 133 replies
    • 21.6k views
    • 5 replies
    • 1.3k views
    • 11 replies
    • 1.2k views
    • 6 replies
    • 1.4k views
    • 7 replies
    • 1.3k views
    • 46 replies
    • 8.1k views
    • 1 reply
    • 467 views
    • 2 replies
    • 818 views
    • 34 replies
    • 16.2k views
  8. AR 3676 1 2

    • 30 replies
    • 5.6k views
    • 69 replies
    • 6k views
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