Filament activity in a quiet region flare |
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Authors: | K Sundara Raman S S Gupta R Selvendran |
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Institution: | (1) Indian institute of Astrophysics, 624103 Kodaikanal |
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Abstract: | We have taken the case of a circular Hα filament observed on May 9,1979 erupting into a double-ribbon flare associated with
a non-spot region. The plage motions are responsible for the filament reorientation and, here as a special case, wherein the
filament attains a clear circular shape before the onset of a flare. We conclude that the change in the orientation of the
Hα filament marks the instability giving rise to the flare. |
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Keywords: | Spectroheliograms spotless flare Hα filament plages |
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