October « 2016 « Solar Section

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.