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:

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.


March 30, 2016

The 2016 Mercury Transit

Have you already made any plans for the Mercury Transit which is coming upon us very fast?  Dr. John E. Westfall, the Coordinator of the Venus and Mercury Section wrote a marvelous article in the Spring Journal of the ALPO about the transit which is to happen on May 9th.  We are encouraging everyone to read this in order to become familiar with what to expect, and if you actually observe or image the event, we always appreciate your submissions for our archive via email to .

In addition, those who might take on the challenge to calculate the length of the Astronomical Unit (distance between the Earth and the Sun), might research the Solar Section’s archive the days after the event to look for the right images captured by individuals separated far enough from each other to extract the data they need for this effort. Follow the link here to download Dr. Westfall’s article.


August 30, 2015

Carrington Rotation Dates released August 30, 2015

Good Morning,

Jeff Beish has supplied the Solar Section with Carrington Rotations dates from CR2092 to CR3082.
These are now availale in pdf download on the Solarblog site under A.L.P.O. SOLAR SECTION EPHEMERIDES page.

Brad Timmerson also supplied a Decimal Date file for CR2166 to CR2230 and is also available on A.L.P.O. SOLAR SECTION EPHEMERIDES page.

Kim Hay
A.L.P.O.Solar Section Co-ordinator


July 24, 2015

Carrington Rotation Dates released August 30, 2015

Carrrington Rotation CR2163 click on CR2163. This has been uploaded to the Solar Section.

There were three observers with 23 submitted images.

Kim Hay
ALPO Solar Section Coordinator


June 28, 2015

Carrington Rotation Dates for CR2166

Title: CR2166
Description: CR2166 begins
Start Date: 2015-07-15
End Date: 2015-08-11


June 28, 2015

Carrington Rotation Dates for CR2165

Title: CR2165
Description: CR2165 begins
Start Date: 2015-06-18
End Date: 2015-07-14


February 14, 2015

Solar Dynamics Observatory- 5 years of Solar Imagery

Here are a couple of great solar movies put out by Goddard Space Flight Centre

5th Anniversay of SDO

Longer Version

and the Difference between Solar Flares and CME’s

Enjoy, Spectaular images.


February 2nd, 2015

Geo-magnetic Storm in progress

There is a Geo- magnetic Storm in progress


January 3, 2015

Sunspot AR 2253

According to Only a few days ago, sunspot AR2253 did not exist. Now the fast-growing active region is wider than the planet Jupiter.

If its clear in your area go take a look, and watch the morphology of AR2253.


September 6, 2014

TESIS- The Sun Shines for Everyone

The TESIS page is a very good page for watching of solar flares, and keeping in touch with all Geomagnetic happenings on the sun.


From the TESIS website:

The TESIS includes five space instruments:

MgXII Imaging Spectroheliometer (MISH) with spherical bent crystal mirror, for observations of the Sun in the monochromatic MgXII 8.42 A line
EUV Spectoheliometer (EUSH) with grazing incidence diffraction grating, for the registration of full solar discs in monochromatic lines of the spectral band 280–330 A
Two Full-disk EUV Telescopes (FET) with multilayer mirrors covering the band 130-136 A and 290-320 A
Solar EUV Coronagraph (SEC), based on the Ritchey-Chretien scheme, to observe the inner and outer solar corona from 0.2 to 4 solar radii in spectral band 290-320 A
X-ray photometer-spectroheliometer SphinX, designed by the Space Research Center of the Polish Academy of Science

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