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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. AR13102 watch party! (Old 3088) 1 2 3 4 7

    By WildWill,
    • 157 replies
    • 8k views

  2. AR 13098 1 2

    By Newbie,
    • 29 replies
    • 1.8k views

  3. About the CIR for 17 september

    By Mogh, Lord of Blood,
    • 2 replies
    • 399 views

  4. Streamers

    By MinYoongi,
    • 7 replies
    • 878 views

  5. Odd-looking magnetogram

    By Philalethes,
    • 5 replies
    • 433 views

  6. AR 13088 The sunspot that keeps giving! 1 2 3

    By Newbie,
    • 56 replies
    • 3.7k views

  7. STEREO A Approaches Earth

    By Drax Spacex,
    • 9 replies
    • 645 views

  8. Questions about solar wind

    By LunarLights58,
    • 6 replies
    • 1k views

  9. AR13089 1 2 3 4 7

    By WildWill,
    • 165 replies
    • 8.8k views

  10. Erroneous classification of AR 13089 1 2 3

    By Newbie,
    • 64 replies
    • 2.3k views

  11. How can such a big jump happen?

    By MinYoongi,
    • 3 replies
    • 470 views

  12. Region 3086

    By Drax Spacex,
    • 5 replies
    • 644 views

  13. Flares, CME, whether earth directed - How to know?

    By RajSim,   
    • 1 reply
    • 408 views

  14. Region 3085 1 2

    By Philalethes,
    • 37 replies
    • 1.8k views

  15. Region 3078 1 2 3 4 8

    By MinYoongi,
    • 177 replies
    • 8.3k views

  16. How high are chances of a major CME? 1 2

    By Mogh, Lord of Blood,
    • 28 replies
    • 3.1k views

  17. Region 3081

    By MinYoongi,
    • 8 replies
    • 699 views

  18. Region 3079

    By Vancanneyt Sander,
    • 19 replies
    • 504 views

  19. Region 3068

    By Sam Warfel,
    • 12 replies
    • 1.2k views

  20. How does it work ? Solar winds and sunspots

    By Mogh, Lord of Blood,   
    • 11 replies
    • 1.1k views

  21. Are those new sunspots dangerous ?

    By Mogh, Lord of Blood,   
    • 4 replies
    • 521 views

  22. Sunspot?

    By Yak,
    • 4 replies
    • 633 views

  23. C9 Flare

    By Yak,
    • 4 replies
    • 953 views

  24. SOHO Lasco c2 shows an impact on 7/31 at about 20:00

    By Strom,
    • 0 replies
    • 385 views

  25. Where have all the Sunspot numbers gone...long time passing...

    By Dr. I,
    • 20 replies
    • 1.1k views
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