Solar Section        

 
 

September 9, 2018

A Short Summary of Carrington Rotation 2206

Carrington Rotation 2206 covered the time period from 2018-07-09 2038 UT – 2018-08-06 0143 UT.
195 Images/Observations were submitted at the time of this writing. The submissions can be viewed in ALPO’s Solar Archive for CR2206:

http://alpo-astronomy.org/gallery3/index.php/Solar-Observations-Archive/SolarImages2018/CR2206

CR2206 made its mark by only showing a small sunspot on three days, and conversely, it also marks the rotation that showed several long periods of spotless days. A period of 48 days spanning from CR2205 into CR2207, was mainly spot less, and only interrupted twice with a small Active Region. The first period went for 24 days when it was interrupted with a one day area AR2716. This was followed with a new period which lasted for 10 days. At this time a small two day area interrupted the stretch which then continued until 8/15. In summary, a streak of 48 days (spanning from rotation 2205, through 2206 into rotation 2207) was interrupted twice with a spot a little bigger than a pore of 10 millionths. Since the Active Regions were 10 millionths, the total Active Region Area for rotation is 30 millionths and the total spot count for the rotation is 3. This is the lowest for the current transition period since Solar Max. In addition, the Sun’s flare activity has also reduced compared to the previous rotation, and accounted for a total of only 2 A-class flares, as well as 8 B-class flares, leaving the overall Solar Activity Very Low. The rotation ended with Spotless Day 264 since Solar Max.

This time we would like to feature some images submitted by three of our observers, Frank Melilo, Guilherme Grassman, and an animation by Theo Ramakers. Please click the thumbnails below to see the full resolution and activate the animation. Thanks to them, as well as all other contributors for another great rotation. Please take a look at all the drawings/images by clicking on the link above which links to our archive for CR2206.
Clear Skies,
Theo Ramakers
Assistant Coordinator, the ALPOSS

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