Solar Section        


August 30, 2017

A short Summary of Carrington Rotation 2193

Carrington Rotation 2193 covered the time period from 2017-07-20 0606 UT – 2017-08-16 1126 UT.
Solar Activity decreased again, and so did the number of submissions. 281 Submissions were added to the archive at the time of this summary, and can be viewed in ALPO’s Solar Archive for CR2193:

The Solar activity, in terms of total active region areas, during the rotation was only approx. 1/6 of the previous rotation. During the rotation we could observe 4 regions AR2668 – AR2671, of which AR2667 lasted only one day. The rotation started with a spotless period of 10 days, interrupted for 1 day on 7/26 with a small 10 millionths’ region AR2668. Another small region AR2669 popped up for two days on 7/30 and 7/31 followed again by two spotless days on 8/1 and 8/2. That’s when AR2670 came around the Eastern limb with 160 millionths on 8/3 which was the largest daily area during the rotation. The highest Wolf number 13 was shared on three days from 8/4 to 8/6 and the total spotless day count for the cycle stands at 91. The rotation ended the first day when the region AR2671 started to come around the Eastern limb.
For this Rotation we would like to feature three images by three of our observers, Dave Tyler, Monty Leventhal, and Howard Eskildsen. Thanks to them, as well as all other contributors, for another great rotation. Please take a look at their images by clicking on the link above linking to our archive for CR2192.
Clear Skies,
Theo Ramakers

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