23 April 2014 - Mission Day: 6718 - DOY: 113
Hotshot
 
 


Almost Full Circle in Extreme Ultraviolet

SOHO EIT 171 Angstrom images over a solar cycle SOHO EIT 195 Angstrom images over a solar cycle
JPEG (with dates) TIFF (with dates) JPEG (with dates) TIFF (with dates)
JPEG (no dates) TIFF (no dates) JPEG (no dates) TIFF (no dates)
SOHO EIT 284 Angstrom images over a solar cycle SOHO EIT 304 Angstrom images over a solar cycle
JPEG (with dates) TIFF (with dates) JPEG (with dates) TIFF (with dates)
JPEG (no dates) TIFF (no dates) JPEG (no dates) TIFF (no dates)

An EIT image from each year of nearly an entire solar cycle assembled by Steele Hill (NASA GSFC).
Click on the images for larger JPEG files with dates, or the various text links above for images without dates or larger TIFF (2700 x 2030 pixels, 16 Mbyte) images suitable for print applications.

Quicktime movie, small (9.1 MB) / large (72.1 MB) / MPEG movie (21.8 MB)


The Solar and Heliospheric Observatory (SOHO) celebrates its 12th launch anniversary on December 2. In late 1996, shortly after its launch, SOHO was able to observe the last minimum of the roughly 11-year activity cycle of the Sun. The minimum was followed by a rapid rise in solar activity, peaking 2001 and 2002. Activity levels have slowly declined since then, but we haven't reached solar minimum yet, despite passing 11.1 years since the last minimum — the average length of a solar cycle.

In fact, the sunspot cycles measured since the mid-18th century vary in length from 9.0 to 13.5 years, and while a team of experts assembled by NOAA, NASA, and ISES has attempted to predict when the next solar minimum will be, we won't really know until we get there. The experts, in fact, were sharply divided about the time of the next minimum and the intensity of the next maximum, which should arrive about 2012 or 2013.

Whenever the next cycle begins, SOHO will be there to observe it.

 

Related Links

 
 

• European Site • US Site

 

Feedback & Comments: SOHO Webmaster

Last modification:

SOHO
and
SOHO
SOHO is a project of international cooperation between