Fig. 3. The evolution of the active region NOAA AR 11429 close-up view, during the period March 04–15, 2012; intensitygrams (upper panels; KSU local data) and line-of-sight magnetograms (lower panels; SDO/HMI images). Positive flux is white (North polarity; outward directed), negative is black (South polarity; inward directed). North is up and west is to the right. The corresponding dates are reported.