B. Helicity & CMEs
Solar eruptions come from twisted magnetic fields
Relevance: Quest I, Campaign 2 – The effects of solar
variability on the solar atmosphere and heliosphere

The story behind the headline:
• Twisted magnetic flux tubes emerge to form solar filaments
• Twist related to CMEs
• Twisted coronal structures (sigmoids) observed correlated with
   eruptions
• Earth-directed (halo) CMEs relate to disturbances at Earth
• Filament cavities è flux rope at 1 AU
• Filament cavities might arise from streamers è STEREO