The turbulent life of 05/720
The sunspot group with Catania nr 05 (NOAA 0720) rotated over the westlimb on Jan 22. While it was visible on the solar disk, it dominated space weather and was responsible for a few days of severe geomagnetic disturbances.
Nederlandstalige versie /Version franaise posted: January 26, 2005
Click on the pictures to see a white light/MDI movie of the life of that remarkable sunspot group. The pictures are all taken by the MDI instrument onboard of SOHO. The left movie shows the Sun as we see here (although, with a better resolution as our eyes), while the right movie pictures the solar magnetic fields as they go in or come out of the solar surface.

This explosive group was responsible for 5 X-flares!

Read the whole story in the weekly bulletin.