The spectrum includes an interplanetary type III burst which starts, in the low corona at decimeter wave length, a type II burst and a complex continuum.

The Halo CME seen (SOHO/LASCO)

NRH 164 MHz

NRH image at 410 MHz (11:04 UT) with the position of the Moreton wave (11:05 UT) superposed.

The evolution of the Halpha and radio emissions seen by the Meudon H ? telescope and the NRH are associated with a X17.2 flare and a halo CME. At 164 MHz, radio images show that the emission covers the whole disk of the Sun and extends as far as 1.8 Rs from the sunÕs center in a few minutes. The radio emissions, the Moreton wave seen in H ?, and the CME all show a similar temporal and spatial development and the three phenomena are likely to be related.

(Pick et al., The Astrophysical Journal, Volume 631, Issue 1, pp. L97-L100, 2005)