Disclaimer: The following material is being kept online for archival purposes.
Although accurate at the time of publication, it is no longer being updated. The page may contain broken links or outdated information, and parts may not function in current web browsers.
Large scale structures and changes associated with the 'halo' CME on May
We present initial results of an analysis of observations leading up to
and during the 'halo' coronal mass ejection (CME) of May 2, 1998 detected
by SOHO LASCO. This event was associated with a large eruptive flare, whose
initial stages were observed by Yohkoh. We examine the development
of large-scale structures seen with the Yohkoh SXT and the Nancay radioheliograph.
These reveal changes in large-scale structures (connected to dimmings and
Moreton waves -- seen in SOHO EIT images) as well as jets and other ejecta.
The small scale development during the flare is observed in the Yohkoh
SXT and HXT data, and in the SOONSPOT H-alpha images. In this work we examine
the causal relation between the flare, the inferred coronal shock wave,
the small-scale and large-scale structural changes, and the CME.
Authors: S. Pohjolainen, J.I. Khan, D. Maia, M. Pick and N.
Organization: Observatoire de Paris, DASOP
Telephone: +33-1-45 07 77 79
07 79 59
Address: 5, Place Jules Janssen
Above is background material for archival reference only.