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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.

870 topics in this forum

  1. this looks like a very active spot coming onto the disk looking at this flare and CME it launched

    By farm24,
    • 19 replies
    • 1.1k views

  2. Is AR2891 active? 1 2 3 4 6

    By Sam Warfel,   
    • 137 replies
    • 7.6k views

  3. CH HSS from a northern crown extension

    By Drax Spacex,   
    • 4 replies
    • 447 views

  4. Electrostatics of suns corona and outside influences

    By solar investigator,
    • 1 reply
    • 346 views

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

    By Drax Spacex,   
    • 280 replies
    • 29.7k views

  6. Has something like this happened before

    By No pseudoscience,
    • 3 replies
    • 594 views

  7. Solar cycle 25

    By solar investigator,
    • 6 replies
    • 977 views

  8. Ap & aa Indices and Solar Minimum 1 2 3

    By theartist,
    • 63 replies
    • 14.6k views

  9. How will the JWST bolster our ability to understand and forecast solar activity?

    By TheHeroOfTime,
    • 0 replies
    • 253 views

  10. Total blackout 1 2

    By Marc-D,
    • 28 replies
    • 2.7k views

  11. Should we be worried?

    By Mckinnon,
    • 3 replies
    • 823 views

  12. Signs and indications for a decaying sunspot

    By MinYoongi,
    • 4 replies
    • 586 views

  13. i just relized this pattern

    By farm24,
    • 3 replies
    • 691 views

  14. would region 2887 be a beta-gamma-delta

    By farm24,
    • 1 reply
    • 430 views

  15. Solar flares on the far side of the sun, a possible unstable spot?

    By Isatsuki San,
    • 8 replies
    • 729 views

  16. East Limb Filament Eruption 2021-10-27 02:00

    By Drax Spacex,
    • 1 reply
    • 374 views

  17. i need to figure out how to figure out how to look for delta sunspots

    By farm24,
    • 2 replies
    • 1.2k views

  18. i cant figure this out

    By farm24,
    • 8 replies
    • 933 views

  19. Sunspot today

    By Maurizio Marsigli,
    • 3 replies
    • 933 views

  20. If im correct it appears that the sunspot that is about to rotate onto the disk is a beta

    By farm24,
    • 4 replies
    • 446 views

  21. Carrington longitude AR coordinate stored in archive?

    By Drax Spacex,
    • 4 replies
    • 765 views

  22. Does anyone know how far a CME can travel?

    By GregXRT,
    • 1 reply
    • 373 views

  23. About the M1 flare... 1 2

    By Quilloz,
    • 36 replies
    • 3.9k views

  24. Wavelengths in recent M flare (2021-10-09 06:40) are oddly specific to iron, how could this be?

    By HalfFeralHuman,
    • 8 replies
    • 1.2k views

  25. How do you explain this gap in the solar activity on this morning?

    By Marc-D,
    • 2 replies
    • 632 views
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