Solar Section        

 
 

July 31, 2019

A Short Summary of Carrington Rotation 2219

Carrington Rotation CR2219 covered the time period from 2019-06-29 1113 UT – 2019-07-26 1607 UT.
197 Images/Observations were submitted for the archives. The submissions can be viewed in ALPO’s Solar Archive for CR2219:
http://alpo-astronomy.org/gallery3/index.php/Solar-Observations-Archive/SolarImages2019/CR2219
The most notable event during this period was the total eclipse in South America on July 2nd. In addition, the rotation brought us 2 short lived active regions, AR2744 and AR2745, which each lasted only one day. In fact, AR2745 was already gone by the end of the day resulting in a recorded area of 0 millionths. The highest Daily Active Region Area for the rotation was the area of AR2844 of 20 millionths on July 8th, which also was the Total Rotation Active Region Areas for CR2219. During the rotation we had 25 spotless days . The highest Wolf number for the rotation was 12 on July 8th, and we should note that we have not seen an Ri of 0 yet. The Rotation continued the transition from C24 to C25 with a number of reverse polarized areas of which the largest one, AR2744, is included in our report on July 7th. This was the second named active region that was reverse polarized since Solar maximum. (The first one was AR2620 on 2019-12-21) See our .pdf of the Reverse Polarized Areas Overview with the latest updates of these reverse polarized areas for this rotation by clicking here:
http://www.alpo-astronomy.org/solarblog/wp-content/uploads/2019/04/2019-04-xx-RevPolarized.pdf .
Overall Solar Activity remained Very Low and the rotation increased the spotless days count since solar maximum to 502, which brings the total spotless days for Cycle 24 so far to 855. Finally, the Sun produced 3 A-class, 5 B, and no C-class flares during the rotation.
This time we would like to feature some images submitted by, Guilherme Grassmann, Geert Vandenbulcke, and German Morales. Please click the thumbnails below to see the full image. Thanks to all contributors for another great rotation. Please take a look at all the drawings/images by clicking on the link above which will bring you to our archive for CR2219.
Clear Skies,
Theo Ramakers
Assistant Coordinator, the ALPOSS

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