Fig. 3.
Solar disk observations. (a): longitudinal magnetic field from MDI on May 22 with the active region (AR) numbers. (b) and (c): Meudon spectroheliogram observations in Ca II and Hα, respectively, showing the long filament (F) in the west in Hα. (d) and (e): radio images in 17 GHz obtained in Nobeyama showing the filament eruption between 03:05 and 3:25 UTC. (f): zoom in Hα on the filament and AR 9948.
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