Beginning stages of local magnetic field formation

On the basis of the investigation of the initial stages of local magnetic field formation the conclusion was reached that the appearance of a new photospheric magnetic flux - which plays an important role in the background magnetic field development - is highly influenced both by the convectional elements of different modes and by its interrelation with old magnetic fields. It seems to be very difficult to explain the observed regularities by terms of the magnetic flux tube emergence only, the practically simultaneous development of active regions belonging to different solar hemispheres and even to different activity cycles in one relatively narrow ''unipolar sector'' of the background field. The same is true as regards the different role and speed of negative and positive polarity fields in new field formations. The importance of velocity measurements for the solution of observed phenomena is stressed. (author)