The magnetic-field polarity of quiescent prominences

A statistical analysis of magnetographic data on quiescent solar prominences is presented. The existence of two different magnetic field systems in quiescent prominences is suggested. The first system is oriented opposite to the underlying photospheric field; the angle between the long axis of the filament and the field direction is equal to 15 deg and B-parallel equals 15-18 G. The polarities of the second system and of the underlying photospheric field are the same, B-parallel = 5-7 G.