Dynamic spectrum of the type II radio burst and flux comparison of the type II and radio sources observed by NRH. a: dynamic spectrum from the NDA showing the type II radio burst. b: intensity of the type II burst at three frequencies: 40, 60, and 77 MHz, along the dashed white lines in a. c: flux density of the radio sources observed by the NRH during the same time period as in a at 150 and 173 MHz.