  We report here a pulse profile evolution study of an accreting X-ray pulsar
LMC X-4 during and after the large X-ray flares using data from the two
observatories XMM-Newton and RXTE. During the flares, the pulse profiles were
found to have a significant phase offset in the range of 0.2-0.5 compared to
the pulse profiles immediately before or after the flare. Investigating the
pulse profiles for about 10^5 seconds after the flares, it was found that it
takes about 2000-4000 seconds for the modified accretion column to return to
its normal structure and formation of an accretion stream that causes a dip in
the pulse profile of LMC X-4.
  We have also carried out pulse phase resolved spectroscopy of LMC X-4 in
narrow phase bins using data from EPIC-pn and spectroscopically confirmed the
pulsating nature of the soft spectral component, having a pulse fraction and
phase different from that of the power-law component.
