The analysis of solar flare on March 24, 1966.

Astronomy and Astrophysics – Astronomy

Scientific paper

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Solar Flares: Motions, Solar Flares: Magnetic Fields, Solar Flares: Models

Scientific paper

The data of a large two-ribbon flare observed at Purple Mountain Observatory on March 24, 1966 are analysed numerically. The results show that: the filament activation plays an important role in the triggering of the flare and both emerging heteropolarity flux in the active region and photospheric shearing motion near the filament footpoint are responsible for the filament eruption. The emerging flux causes the change of the background field and the photospheric shearing motion which twists the axial magnetic field inside the filament leads to the increase of the current intensity, so that the equilibrium of the filament is unstable and the filament motion occurs upwards. Finally the physical relation between the ascension motion of the filament and the eruption of the flare is analysed and discussed.

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