The season of filament eruptions
In the time period around solar minimum, we have less sunspots, less flares, less CME's. If there are CME's, they predominantly originate from erupting filaments.
Nederlandstalige versie /Version française posted on April 28, 2005
see a movie
SOHO/EIT 304Å can capture nicely filaments and possible eruptions. Filaments are pictured as dark lines on the solar disk. When they erupt, they appear as orange loops in the black area around the Sun.
The pictures above concern filament eruptions on April 21, 22, 24, 25, 26 and 27 (click on the figures to see an enlargement). The one on April 25 and 26 resulted in faint, rather slow partial halo CME's ejected in the south-west direction: they did not lead to any geomagnetic disturbances.