Location of upflow regions

Upflows at leading

edge of Ha ribbon

Ridge of upflowing

plasma moves with Ha ribbon

Upflow regions

become downflow regions as ribbons move outwards

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Responsible NASA Official:  Gordon D. Holman Web Design:  Merrick Berg, Brian Dennis, Gordon Holman, & Gilbert Prevost Heliophysics Science Division NASA/Goddard Space Flight Center Laboratory for Solar Physics/ Code 671 Greenbelt, MD, 20771, USA Gordon.D.Holman@nasa.gov

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