The Dutch Observatory

September 8, 2020 on 12:52 pm | In Carrington Rotation Review, Sun | Comments Off

September 8, 2020
A Short Summary of CR2234
Carrington Rotation CR2234 covered the time period from 2020-08-11 1150 UT – 2020-09-07 1745 UT.
The observations can be viewed in my Solar Archive for CR2234 which can be accessed at: http://ceastronomy.org/gallery/main.php?g2_itemId=50864
The rotation brought us 21 spotless days, with a spotless streak of 17 days. The rotation showed us 3 named Active Regions AR2770, 71 and 72.  AR2770 extended from the previous rotation for another 2 days.  Another region which was named AR2771 was visible concurrently with AR2770 for one day.  However the new region was short lived with 2 days only.  A third region AR2772 was visible for 3 days starting on 08/19/2020.  The regions were very small at 10 millionths, with AR2772 being the exception by growing to 20 millionths for one day on 08/20/2020, on which day also the maximum wolf number of 24 was observed.  Overall Solar Activity remained Very Low with the total Active Region Area for the rotation measuring only 90 millionths, while the rotation increased the spotless days count since solar maximum to 825 spotless days. Finally, during the period SWPC reported 2 A-class, 13 B class, and no C-class flares. The largest B-Flare, a B3.9 was observed on 08/19/2020.

Even though that solar activity is Very Low, it is also interesting to note that 14 of the last 17 named Active Regions since January 1 of this year were Cycle 25 polarized.
This time I would like to feature some images showing an unnamed, interesting feature that passed by, towards the end of the rotation.
Clear Skies,
Theo Ramakers