General magnetic field reversal in the solar cycle 22 period: 1986–1992

Abstract

Abstract The zonal structure of the magnetic field radial component B(r) has been determined using the mean latitude of magnetic neutral lines, θ(Br = 0, t), on the Kislovodsk magnetic H-alpha charts for 1986–1992. At the minimum activity (m) in 1986, the latitudes of the zonal boundaries in the N-hemisphere were θ(N, 2m) = 39° and θ(N, 1m) = 18° and those in the S-hernisphere,θ(S, 2m) = – 42° and θ(S, 1m) = – 15°. The high-latitude boundary θ(N, 2m) of the “–” polarity field at the latitudes higher than 40° reached the pole in 1991.0 and that moment corresponded to the reversal of the poloidal component B(p) to “+”. In the S-hemisphere, the boundary of the zone of “+” polarity θ(S, 2m) reached the pole in 1992.0 and that corresponded to the reversal of the B(p) to “–” at the latitudes higher 40°. From 1991.0 to 1992.0, the solar polar magnetic field had the same “+” polarity in both hemispheres. It is shown that the magnetic field reversal in the n-cycle is caused by the poleward migration of the magneti...