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Elongation of Flare Ribbons
2017
Astrophysical Journal
We present an analysis of the apparent elongation motion of flare ribbons along the polarity inversion line (PIL) as well as the shear of flare loops in several two-ribbon flares. Flare ribbons and loops spread along the PIL at a speed ranging from a few to a hundred km/s. The shear measured from conjugate foot-points is consistent with the measurement from flare loops, and both show the decrease of shear toward a potential field as a flare evolves and ribbons and loops spread along the PIL.
doi:10.3847/1538-4357/aa6341
fatcat:mpbi6vvohzffdnapowcnbmxu4y