A Chandra TOO observation of the inner part of the Crab nebula has been performed on 2010 Oct 28 from 17:40 and 19:41 UT to monitor the evolution of the small scale structures in the region of the inner ring after the GeV flare detected by AGILE and FERMI on 2010-09-19 (ATels #2855 and #2861). <p/>During a previous observation, performed on 2010-09-28 from 05:05 to 07:01 UT (ATel #2882), a series of three bright knots were noticed on the inner ring, at about 6 arcsec SE of the pulsar, in the region of apparent intersection with the jet.