Wave power excess in the medium-frequency range (5.5 mHz to 8.5 mHz, top row) and in the high-frequency range (8.5 mHz to 16 mHz, bottom row) of the intensity variation in the K_2V band (left column) and line-core minimum (right column). Positive excess corresponds to larger values of power one minute after t = 3.27 min and negative excess corresponds to larger values of power one minute before t = 3.27 min. The central black contour shows the location and scales of the MBP at t = 3.73 min.