The season of filament eruptions

In the time period around solar minimum, we have less sunspots, less flares, less coronal mass ejections (CMEs). If there are CMEs, they predominantly originate from erupting filaments.

SOHO/EIT 304 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. The one on April 25 and 26 resulted in faint, rather slow partial halo CMEs ejected in the south-west direction: they did not lead to any geomagnetic disturbances.

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