Matter flow velocities in the active region emission loop observed in the solar H-alpha line

The geometry of the emission loop in the active region is reconstructed and its true shape and size are determined. The loop was positioned almost vertically with respect to the solar surface and it tilted in its own plane. The loop matter rose from the solar surface along one leg with velocities of 105-35 km/s and it descended along the other leg with velocities of 14-65 km/s. The shape of the loop corresponded well with the magnetic dipole field line.