Latitude structure of the large-scale solar magnetic field in separate longitudinal intervals. I Solar cycle No. 20.

An analysis of the distribution of background magnetic fields in the 20th solar cycle using H_α charts is made. The peculiarities of the time-latitude distribution of the field at all the latitudes are determined predominantly by the poleward migration of magnetic fields of active regions. On the latitude versus time diagram only few cases are observed of equatorial fluxes of the field at some longitudes. They are due to the latitude-longitude structure of separate unipolar regions on H_α charts.