Upper panel: Dynamic spectrum of type II burst recorded by Learmonth Observatory on 6 July 2006 in the range 180–25 MHz. The type II burst started at 08:24 UTC and lasted for 17 minutes. The white dotted lines represent the fundamental and harmonic bands. Lower panel: Three-part structure of the CME with a core, cavity, and leading edge recorded by LASCO C2 on 6 July 2006 at 09:06 UTC and 10:06 UTC. The CME started at 08:54 UTC (Appendix A.1).