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Fig. 1.


Dynamic spectra and images of the radio bursts and CME observed on 22 July 2012. a: dynamic spectrum from the NDA showing a faint type II radio burst occurring a few minutes after a set of type III bursts. b: zoom-in of the dynamic spectrum in a showing the type II burst in more detail as observed by the NDA at 20–80 MHz and the higher frequency observations from the ARTEMIS-IV Radiospectrograph (Kontogeorgos et al. 2006) at 80–175 MHz that did not observe any type II signatures or other distinguishable radio bursts. c: contours of the radio emission observed in images from the NRH at 150 (purple) and 173 (brown) MHz overlaid on SDO/AIA 211 Å running-difference images of the Sun. Movies 1 and 2 are available online.

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