Previous abstract Next abstract

Session 70 - Solar Flares and Ejections.
Display session, Thursday, June 13
Tripp Commons,

[70.09] The Large Limb Event of July 9, 1982

S. D. Jordan (NASA/GSFC), A. Garcia (Obs. de Coimbra, Portugal), V. Bumba (Ondrejov Obs., Czech Republic)

An erupting prominence was observed on the East solar limb on July 9, 1982 in a series of K3 spectroheliograms taken at the Solar Observatory in Coimbra. Events associated with this eruption were observed with the Hard X-ray Burst Spectrometer (HXRBS) on SMM and a number of other instruments on the ground and in space including the Solwind satellite, which observed an energetic coronal mass ejection (CME) during the same time-frame. An impulsive flare occurred about one hour before the rise-time of the soft X-ray long duration event (LDE) and the apparent rise-time of the CME. This extensive set of observations permitted a comparison of this complex flare-erupting prominence-CME-LDE with a model proposed by Hundhausen (1994, 'Coronal Mass Ejections,' in "The Many Faces of the Sun," Springer-Verlag). Both similarities and differences are noted. While the start of the CME almost certainly follows the impulsive flare, it cannot be concluded that the flare is the 'cause' of the CME. The importance of determining the relative rise- times for the CME and the LDE is underscored by this study. Two other energetic events from the same active region are also discussed. It is concluded that no one model for the phenomenon: flare-erupting prominence-CME-LDE is satisfactory, even for these three events.

Program listing for Thursday