Time-difference dynamic spectrogram (running difference spectra at 0.1 s time resolution for ORFEES and 1 s for EOVSA) in the range 144–1800 MHz, microwave (middle panel) and X-ray light curves (bottom panel) during the early phase of the radio event. The horizontal lines in the ORFEES spectrum and the vertical bars in the EOVSA spectrum between 1100 and 1200 MHz are terrestrial interference.