A FILAMENT ERUPTION AND ACCOMPANYING CORONAL FIELD CHANGES ON NOVEMBER 5, 1992

An H alpha filament eruption on November 5, 1992 was fully observed in HCL With the Hida Flare Monitoring Telescope, while Yohkoh's Soft X-r ay Telescope observed the pre- and post-eruption evolution of the coro nal magnetic fields. From the H alpha data, including the led and blue wings, we have reconstructed the rise of the filament, including traj ectory, velocity, and acceleration. In combination with the Yohkoh dat a this reconstruction suggests that the filament had several interacti ons with other coronal magnetic fields during the eruption. The Yohkoh data also shows pre-eruption changes in the coronal fields and severa l post-eruption bright coronal structures. The pre-eruption changes ar e interpreted as a partial opening of the corona, indicating that it i s not necessary to have a complete opening of the corona in order for a filament to erupt and we discuss the several possible contributions from emerging flux. The post-event bright coronal structures are compa red with theory and with a cleaner filament eruption event on July 31, 1992. These comparisons suggest that, although there are many similar ities, it is hard to completely reconcile the observations with the ex isting theory.