Solar Section        

 
 

July 5, 2019

A Short Summary of Carrington Rotation 2218

Carrington Rotation CR2218 covered the time period from 2019-06-02 0629 UT – 2019-06-29 1113 UT. With the drop in activity so did the number of observations. 194 Images/Observations were submitted for the archives. The submissions can be viewed in ALPO’s Solar Archive for CR2218:
http://alpo-astronomy.org/gallery3/index.php/Solar-Observations-Archive/SolarImages2019/CR2218
On June 25th, the rotation brought us 2 active regions. AR2742 a one day active region, and AR2743, both of which ended the longest spotless streak since solar max. of 36 days. The highest Daily Active Region Area for the rotation was 20 millionths on June 25, while the total active region areas for the rotation was 40 millionths down from 3030 millionths in the last rotation. During the rotation we had 24 spotless days . The highest Wolf number for the rotation was 24, also on June 25th. The Rotation continued the transition from C24 to C25 with a small number of reverse polarized areas of which the most recent ones were on June 20th. See our .pdf overview with the last 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 477, which brings the total spotless days for Cycle 24 so far to 830. Finally, the Sun produced 3 A-class, and zero B and zero C-class flares during the rotation.
This time we would like to feature some images submitted by, Frank Melillo, Howard Eskildsen and Theo Ramakers. 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 CR2218.
Clear Skies,
Theo Ramakers
Assistant Coordinator, the ALPOSS

 

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