SXT/H-alpha overlay of sigmoids, courtesy D. Zarro
SOHO/CDS movies of sigmoid evolution on disk at a range of spectral lines, courtesy D. Pike
SOHO/CDS movies of sigmoid eruption observed at the W limb, courtesy W. Thompson
Meudon H-alpha movie showing disappearance of southern part of filament, 20 Aug 1999
X-ray image from Yohkoh SXT , H-alpha images from BBSO
Backwards S filament disappearing
and reforming
notes on
filament evolution observed
Filament on the move!! - Compare 18 Aug 15:49 UT and 19 Aug 17:02 UT (also see TRACE movie below)
Farewell to the filament - before
( August 24th, at 14:55:41 UT) and after (August 25th, at 15:29:39 UT)
pictures from Helio Research
TRACE 195 Angstroms images, showing the small flare seen in CDS movies on 21 August
