Time-distance plots of the transverse cuts in the SDO/AIA 211 Å, 193 Å, and 171 Å bandpasses, respectively. The top of the loop as seen in IRIS is at x = 15−20 arcsec where the intensity enhancement is visible in 171 Å. Bottom: intensity averaged across the data cut for each AIA bandpass, interpolated along the track highlighted in the 171 Å bandpass, as a function of time, normalised with respect to their peak value.