  We analyze sunspots rotation and magnetic transients in NOAA AR 11429 during
two X-class (X5.4 and X1.3) flares using the data from the Helioseismic and
Magnetic Imager on board the \emph{Solar Dynamics Observatory}. A large leading
sunspot with positive magnetic polarity rotated counterclockwise. As expected,
the rotation was significantly affected by the two flares. The magnetic
transients induced by the flares were clearly evident in the sunspots with
negative polarity. They were moving across the sunspots with speed of order
$3-7\ \rm km \ s^{-1}$. Furthermore, the trend of magnetic flux evolution of
these sunspots exhibited changes associated with the flares. These results may
shed light on the understanding of the evolution of sunspots.
