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Published online by Cambridge University Press: 18 July 2016
1. Brief summary of the dynamics of flare development, based on the analysis of moving picture and spectroscopic data. Some new spectroscopic data on the fine structure of emission in active regions, evidencing the peculiar character of motions in them: outbursts of corpuscules, ascending grains of continuous emission, explosive processes and shock-waves.
2. Summary of the observational data on the motions in prominences. Regular electromagnetic and turbulent motions, ‘explosive’ motions and their admissible interpretation. Some data on the coronal forms above active regions and on the possible role of hydromagnetics in their formation.
3. Some remarks on the role of hydromagnetics, admissible, from the observational aspect.