AR 13664, from May 2024, is one of the largest ARs on record, with an area of 2400.

One AR, from October 2014, had an area of 2700.

Another AR, from March-April 2001, had an area of 2400.

An infamous AR, from October-November 2003, had an area of 2600.

Another infamous AR, from March 1989, had an area of 3600.

Edited October 13, 2024Oct 13 by faster328

Made summaries for the rotations of this AR (AR 13664).

 

 

Summaries for:

 

AR 13664 (first rotation of AR 13664), short form AR 3664:

https://community.spaceweatherlive.com/topic/3192-ar3664/page/46/#comment-62285

 

 

 

AR 13697/AR 13727 (second and third rotations of AR 13664), short form AR 3697/AR 3727:

https://community.spaceweatherlive.com/topic/3257-ar-3697/page/24/#comment-63699

 

Marked this topic as historical.

(1135th post/1134th reply) (AR3664 topic stayed at 1129 posts/1128 replies until 9 October 2024)

 

-@faster328, 13 October 2024

Edited October 13, 2024Oct 13 by faster328

On 10/10/2024 at 12:30 PM, faster328 said:

AR 13664 Summary

Infamous AR 13664 (S18) first rotated into view on 1 May 2024.

It then grew to become the largest and most complex AR as of 10 October 2024, with 12 X-class flares.

Then, on 5 May 2024, deltas started forming in the whole area of AR 13664, especially the region initially numbered as AR 13668 (this is where most of the large flares occur).

Then, on 8 May 2024, it produced an X1.04 flare.

Later, on that very same day, it produced an X1.02 flare.

Then, on 9 May 2024, it produced an X2.25 flare.

Later, on that very same day, it produced an X1.12 flare.

Then, on 10 May 2024, it produced an X3.98 flare.

Then, on 11 May 2024, it produced an X5.89 flare.

Later, on that very same day, it produced an X1.54 flare.

Then, on 12 May 2024, it produced an X1.02 flare.

Then, on 14 May 2024, it produced an X1.72 flare.

Later, on that very same day, it produced an X1.25 flare.

Later, on that very same day, it produced an X8.79 flare, the largest earthside flare of SC25 from 14 May 2024 to 3 October 2024, when AR 13842 beat the record with an impulsive X9.05 flare.

It finally rotated out of view on 15 May 2024.

Then, on 15 May 2024, it produced an X3.48 flare, measured X9 on the farside.

It produced several farside flares until it produced its final major X-flare, an X12 on the farside on 20 May 2024.

 

-@faster328, 10 October 2024

This is definitely one of the regions where such a summary is nice to have. In this case it could have been interesting to look into which flares produced the halo CMEs that caused the storm too, including some of the M-flares, although that's presumably a bit more work.