Solar Section        

 
 

February 12, 2017

A short Summary of Carrington Rotation 2186

Carrington Rotation 2186 covered the time period from 2017-01-10 0913 UT – 2017-02-06 1724 UT and is our first rotational gallery for 2017.
So far 331 reports and images were submitted for our archive, and can be viewed in ALPO’s Solar Archive for CR2185:

http://www.alpo-astronomy.org/gallery/main.php?g2_itemId=96049

The rotation did start with 3 spotless days. During the rotation we could observe 9 regions of which three did exist for about two days or less. In fact one of them, AR2630 appeared and disappeared almost immediately. The largest region, AR2629, reached its maximum area of 220 millionths on January 26, the same day the Total Active Region Area for the Sun reached its maximum of 410 millionths. The Wolf number reached its maximum of 55 a day earlier on January 25.
Counting the three spotless days at the beginning of the rotation, the total spotless days since Solar maximum increased to 45.

For this Rotation we would like to feature again a few drawings submitted by three of our observers, Monty Leventhal, Joe Gianninoto, and Tony Broxton. Thanks to them as well as all other contributors for another great rotation. Please take a look at their images by clicking on the above link leading to our archive.
Your Solar Section Team,

 
 

January 22, 2016

A short Summary of Carrington Rotation 2185

Carrington Rotation 2185 covered the time period from 2016-12-14 0115 UT – 2017-01-10 0913 UT and is our last rotational gallery for 2016.
226 Reports and images were submitted for our archive and can be viewed in ALPO’s Solar Archive for CR2185:
http://www.alpo-astronomy.org/gallery/main.php?g2_itemId=95313
Whereas we could observe 9 regions during the previous rotation, only 6 regions paraded across the solar hemisphere during this time, AR2617 through AR2624. Two of them, AR2623 and AR2624, appeared and disappeared almost immediately. The largest region, AR2617, reached its maximum area of only 70 millionths on December 14 and 15. Oddly enough SWPC reported AR2624 as containing one spot but no area associated with it. The highest Wolf number of 25 was recorded on December 15.
This rotation produced spotless days for about half of the period. This brings the total spotless days at the end of the rotation to 42 since Solar maximum.

For this Rotation we would like to feature images submitted by three of our observers, Mike Borman, Howard Eskildsen, and Guilherme Grassmann. Thanks to them as well as all other contributors for another great rotation. Please take a look at their images by clicking on the above link leading to our archive.
Your Solar Section Team,

 
 

December 29, 2016

A Short Summary of Carrington Rotation 2184

Carrington Rotation 2184 covered the time period from 2016-11-16 1739 UT – 2016-12-14 0115 UT.
314 Reports and images were submitted for our archive and can be viewed in ALPO’s Solar Archive for CR2184:
http://www.alpo-astronomy.org/gallery/main.php?g2_itemId=93274
During the rotation, 9 Active Regions could be observed, AR2609 through AR2617. The largest region, AR2612, reached its maximum area of only 170 millionths on November 28th. The total Active Region Area for the Solar hemisphere maxed out for the rotation at 260 millionths on November 30st and December 2nd . The Wolf number reached its maximum of 75 in between those two days on December 1st, when three regions were visible on the hemisphere. Carrington Rotation 2184 showed again a quiet time for the Sun as it did have three days with a total active region area and a Wolf number of 0 on November 22, and 23rd as well as December 11th. This brought the total spotless days since Solar maximum to 28.

For this Rotation we would like to feature again images of the Solar drawings submitted by three of our observers, Monte Leventhal, Joe Gianninoto, and Tony Broxton. Thanks to them as well as all other contributors for another great rotation. Please take a look at their images by clicking on the above link leading to our archive.

The ALPO Solar Team.

 
 

 
 

December 12, 2016

ALPOSS – A report on CR2178 and CR2179


ALPOSS Coordinator and Scientific Advisor Richard Hill continues his analysis of the solar activity in his detailed reports of the Carrington Rotations. This time he covers the Carrington Rotations: CR2178 and CR2179, or June 6th through July 30th, 2016. The reports are based on 886 reports and image submissions of numerous contributors to the Solar Observations Archive. The report was published in the 2017 Winter issue of the ALPO Journal, the Strolling Astronomer, and can now also be accessed as a stand alone document on ALPOSS Solar Observations & Reports page, or downloading it by “right”clicking on the picture below.

 
 

November 28, 2016

A short Summary of Carrington Rotation 2183

Carrington Rotation 2183 covered the time period from 2016-10-20 1024 UT until 2016-11-16 1739 UT.
367 Reports and images were submitted for our archive and can be viewed in ALPO’s Solar Archive for CR2183:
http://www.alpo-astronomy.org/gallery/main.php?g2_itemId=91802
During the rotation, 9 Active Regions could be observed. The largest region, AR2607, reached its maximum area of only 100 millionths on November 12th. This is far smaller than the largest area in the previous rotation, and it is also the date where the total area for the Sun maxed out for the rotation at 120 millionths. The Wolf number reached its maximum one day later on November 13th when three regions were visible on the hemisphere for a Wolf number of 38. Carrington Rotation CR2183 showed again a quiet time for the Sun as it did have two days, November 3rd and November 9th, where the total active region area as well as the Wolf number were 0.
We thank all of those who did submit their data and continued their effort to record the solar activity over the years.
For this Rotation we are featuring three random images from our observers. Thanks to them as well as all other contributors for a great rotation. Please take a look at all their submission in our archive, by clicking the link above.

The ALPO Solar Team.

 
 

November 2, 2016

A short Summary of Carrington Rotation 2182


Carrington Rotation 2182 covered the time period from 2016-09-23 0334 UT until 2016-10-20 1024 UT.
610 Reports and images were submitted and all can be viewed in ALPO’s Solar Archive for CR2182:

http://www.alpo-astronomy.org/gallery/main.php?g2_itemId=89942

A total of 8 Active Regions could be observed during the rotation, AR2593 and AR2596 thru 2602. This is less than half of the previous rotation. We had one day without a reported active region during the rotation on October 2nd. The largest region AR2599, maxed out with a region area of 470 millionths on October 6th. The highest “Total Daily Active Region Area” for the hemisphere was recorded on October 10th with 630 millionths with AR2599 being the dominant contributor with 400 millionths. The highest Wolf number of 64 was recorded on October 11th. The “total active region area” for AR2599 (sum of the daily active region area of an active region for the period the region was visible) is only 71% of the largest region during the previous rotation.
Below we feature images of October 6th and 11th of three of our contributors: Dave Tyler, David Teske and Guilherme Grassman. However, we would like to thank all that contributed to our archive and please take a look at them by clicking on the link above.
Your Solar Team

 
 

October 19, 2016

A short Summary of Carrington Rotation 2181


Carrington Rotation 2181 covered the time period from 2016-08-26 2116 UT until 2016-09-23 0334 UT.
481 Reports and images were submitted and can be viewed in ALPO’s Solar Archive for CR2181:

http://www.alpo-astronomy.org/gallery/main.php?g2_itemId=88450

During the rotation, 18 Active Regions could be observed with the largest region, AR2585, reaching its max. area of 590 millionths on September 4th, . This is more than twice that of the active region area covered by the largest AR in the previous rotation, which reached a max. of 290 millionth on August 10th. The total active region area for the hemisphere maxed out two days earlier on September 2nd with 730 millionths and the Wolf number reached its maximum on September 1st with 91. As mentioned, the dominant region during the rotations was AR2585. Unlike the previous four rotation, CR2181 did not have any days with a total active region area of 0 or a Wolf number of 0.
We thank all of those who did submit their data and continued their effort to record the solar activity over the years.
For this Rotation we are featuring three images from our observers Rik Hill, Michael Borman and Randy Tatum. Thanks to them as well as all other contributors for a great rotation. Please take a look at their images in our archive.

The ALPO Solar Team.

 
 

October 3, 2016

A short Summary of Carrington Rotation 2180

Carrington Rotation 2180 covered the time period from 2016-07-30 1539 UT until 2016-08-26 2116 UT.
All 426 submitted observations and images can be viewed in ALPO’s Solar Archive for CR2180:
http://www.alpo-astronomy.org/gallery/main.php?g2_itemId=86911
12 Active Regions could be observed during this rotation with the largest region, AR2574, reaching the largest Active Region Area for the royation of 290 millionth on August 10th. In addition, the Rotation showed two Regions which exceeded an area of over 200 millionths, AR2571 and AR2574. The total Active Region Area for the hemisphere maxed out on August 9 at 490 millionths, which coincided with the highest spot count for the rotation of 31 and a Wolf number of 91. The previous rotations, CR2178 and CR2179 had respectively 11 and 5 days without active regions, and CR2180 continued this pattern with another 5 days without any Active Regions.
We thank all of those who did submit their data and their continued effort to record the solar activity over the years.
This Rotation we are featuring three images from our observers, Dave Tyler, Jamey Jenkins and Chris Schur. Thanks to them as well as all other contributors for a great rotation. Please take a look at their images in our archive.

The ALPO Solar Team.

 
 

September 27, 2016

ALPOSS – A report on CR2174 thru CR2177


ALPOSS Coordinator and Scientific Advisor Richard Hill continues his analysis of the solar activity in his detailed reports of the Carrington Rotations. This time he covers 4 Carrington Rotations: CR2174 thru CR2177, or February 18th through June 6th, 2016. The reports are based on almost 1200 reports and image submissions of numerous contributors to the Solar Observations Archive. The report was published in the 2016 Autumn issue of the ALPO Journal, the Strolling Astronomer, and can now also be accessed as a stand alone document on ALPOSS Solar Observations & Reports page, or downloading it by “right”clicking on the picture below.

 

 
 

August 16, 2016

A short Summary of Carrington Rotation 2179

Carrington Rotation 2179 covered the time period from 2016-07-03 – 1040 UT until 2016-07-30 – 1539 UT.
Submitted observations can be viewed in ALPO’s Solar Archive for CR2179:
http://www.alpo-astronomy.org/gallery/main.php?g2_itemId=84861
12 Active Regions could be observed during this rotation with the largest region, AR2567, reaching a covered area of 390 millionth on July 20th. The total area maxed out on July 21st at 790 millionths. The largest Spot count of 28 was observed on July 19th with AR2575 and AR2567 being the main contributors to this. Whereas the previous rotation CR2178 had 11 days with no regions, CR2179 had 5 days without any Active Regions.
A total of 482 submissions were made by Solar Observers and we thank all of them for their continued effort to record the solar activity over the years.
Instead of featuring three images in this blog, this time we would like to show three of the reports logged by our contributors Joe Gianninoto, Ryc Rienks, and David Teske. Thanks to them as well as all other contributors for a great rotation.

The ALPO  Solar Team.

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