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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.


860 topics in this forum

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  1. ACE vs. DSCOVR

    • 3 replies
    • 3.1k views
  2. Solar Flare Data

    • 2 replies
    • 2.6k views
  3. Finding historical data

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  4. With Maths...

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  5. Solar Observatory for Apple TV

    • 2 replies
    • 1.6k views
  6. coronal hole facing Earth? reported on 31 Dec

    • 1 reply
    • 2.2k views
  7. C8 Will it help produce northern lights?

    • 3 replies
    • 1.9k views
  8. SDO Imagery

    • 1 reply
    • 1.3k views
  9. Two coronal mass ejections

    • 11 replies
    • 2.2k views
  10. promenices-are they a thrat to us

    • 1 reply
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  11. Filament eruption

    • 16 replies
    • 2.6k views
  12. 2454 and 2456

    • 3 replies
    • 1.2k views
  13. How long does a filament travel the far side?

    • 1 reply
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  14. surpised about m flare

    • 15 replies
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  15. Sunspot region 2443 1 2

    • 41 replies
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  16. polarity of CH HSS's

    • 3 replies
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    • 1.6k views
  17. Event solar S 1 protons

    • 3 replies
    • 1.2k views
  18. Returning sunspot region

    • 8 replies
    • 2k views
  19. New Region-anything happening 1 2

    • 30 replies
    • 4.7k views
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