-- SOHO/EIT(Delaboudiniere et al., 1995), 195 Å, 12-min cadence.
-- SOHO/LASCO(Brueckner et al., 1995).
-- Yohkoh/SXT (Tsuneta et al., 1991).

Halo CME events -- sources in the central zone of the disk.

Two types of the SOHO/EIT difference images:

Running difference images - each current image is subtracted from the subsequent one.  Artificial dimmings and brightenings.

Fixed difference images - the same pre-event image is subtracted from all subsequent ones. Rotation effects.

1997.05.12: Running difference ;  Fixed difference ;    Images

Fixed difference images (and movies) rerotated to the pre-event image:
real dimmings and brightenings. Restricted intensity range of +/-(50--150) count/pixel.

Running difference images and movies -- supporting tools.

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