Superposition of the initial time series obtained from the magnetograms of the active region NOAA 11101 and the noise time series obtained from the magnetograms of the point located outside the active region. The value of the noise time series was increased by the 2000 Gauss over its initial value. The active region field-of-view is [100″ × 100″]. The active region center coordinates are [−319″ × 87″] obtained at 20:00:08 UT on 2010 Aug. 28. The point coordinates are [−319″ × −125″] taken at the same time as the sunspot coordinates. The time series starts at 00:00 UT on 2010 Aug. 28.