Abstract

The dynamics of a number of giant post-eruptive arches in several near-the-limb events is studied using the Nobeyama Radioheliograph data at 17 GHz in comparison with observations of the Yohkoh Soft X-ray Telescope. It is found that the leading front and the brightest part of some microwave arches rise in the corona with a characteristic speed of 1--4 km/s, coinciding with that of soft X-ray arches, and lift to altitudes of at least about of 140,000 of km.