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Fig. 2


Active region NOAA 11589 observed on 2012 October 16 by THEMIS/MTR between 08:02 and 09:02 UT. Top: longitudinal magnetic field. Bottom: Hα map showing the two recently formed filaments of Fig. 1. The white arrows indicate the barbs used to infer the filaments’ chirality. Filament F1 is a dextral filament and F2 is a sinistral filament. The + and signs indicate the magnetic field polarity of each end of the filaments. The field of view covers ~ 175′′ × 100′′. The white arrow indicates the north direction.

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