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Astron. Astrophys. 329, 1138-1144 (1998)

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1. Introduction

The eruptive processes in active region NOAA 3804 (Carrington's rotation (CR) No 1724), studied in Jordan et al. (1997), represent the most energetic events that occurred in the evolution of a large-scale activity complex that formed over a period of nearly two years during 1981 - 1982. Three rotations after the July 9, 1982 event, the magnetic configuration of this complex changed rapidly. Only two rotations later it was gone, and had been replaced by a large distinct coronal hole in the same area of the solar surface. Here we describe the evolution of this complex before, during and immediately following the phase of maximum activity.

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© European Southern Observatory (ESO) 1998

Online publication: December 16, 1997
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