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The 7 May 1992 filament disappearance in the low corona is analyzed. The cool and hot components of this event are studied, using Hα, soft X-ray and radio data. We first show the general effect of the disparition brusque (DB) on the life of the filament, which was a quiescent filament in the vicinity of an active region, and then give the history of the development of the 7 May event. The main stages of the event are: (i) the formation of hot arches spanning the cool filament; (ii) rise of the filament, with plasma ejection into the corona, in which we note some spreading of loops from the main body, with two distinct rising velocity phases of the Hα filament; (iii) formation of X-ray arches below the filament, the foot points of the arcades being two-ribbon Hα flare patches. The dynamics of Hα and X-rays features are given. |
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