Dynamic spectrum of the type II burst on 2011 February 14. The combined spectrum was obtained from records of the URAN-2 (10–33 MHz) and NDA (33–70 MHz) antenna arrays. The type II burst and several groups of type III bursts are denoted in the spectrogram as Type II and Type III, respectively. The lower panel shows the solar X-ray emission measured by GOES 15 on that day. The C9.4 class flare start, end, and peak times are shown as dashed vertical orange and cyan lines, respectively. The common time axis is in the range 12:40–13:15 UT.