Top: GOES soft X-ray flux profile in the 1−8 Å  wavelength channel. Middle: projected height-time of the blob plotted with the hard X-ray flux profile in the energy range of 25−50 keV observed with the Fermi Gamma-ray Burst Monitor. Bottom: temporal evolution of the blob speed derived by the height-time measurements using AIA 131 Å  images. The AIA 1600 Å  average integrated counts profile is plotted as a blue curve. The uncertainty in the speed estimate is mainly due to the error in the height measurement, which is assumed to be four pixels (i.e., 2.4″). The vertical dotted line shows start time of the flare at 23:08 UT.