High-resolution prominence spectra in Hα and Hβ lines have been obtained at Sacramento Peak Observatory. Here we present first results of their analysis and compare out data with those reported by other authors. A preliminary comparison with theoretical intensities is also discussed.
The spectra of three surges observed on September 20 and October 2, 1979 havebeen analysed. Rotational velocities have been evaluated for the wide range of heights above the chromosphere. The obtained results show that the rotational velocity decreases from above a hundred km/s at the surge bases to tens km/s at the surge tops. Generally, this tendency is independent of the surge evolution stage.