... It has been established that the transition from the background magnetic field to the fields of an active region occurs near 25­50 G. A dependence of the exponent H on the magnetic field amplitude has been derived. The exponent H for the background magnetic field has been found to be much smaller than that for the fields of an active region. ... Fig. ... As follows from the estimates of Fig. 3, the exponent H is 0.5­0.7 for the magnetic fields of an active region and 0.1 for the background field. ...