On the arch prominence of 1980 November 22

Abstract

Photographic H-alpha observations of an arch prominence, its eruption and subsequent interaction with a neighbouring prominence, taken 1980 November 22 are described. The observations were obtained with a 0.7 A/sup0/ passband Halle filter. Transverse velocities of some portions of this arch have been measured. An explanation is given for the violent eruption of the arch and its subsequent bending towards the neighbouring prominence and for getting joined up with it.