Running difference image of the shock ahead the halo CME entering in the LASCO C2 FOV (left). The expanding front followed the filament eruption shown in Fig. 5 from the same AR. Type II radio burst observed with the e-Callisto system (ALASKA- HAARP, > 16 MHz) combined with space-based STEREO-A/WAVES (< 16 MHz) data (right). The fundamental (F) and harmonic (H) band, after 20:30 UT, are marked with black solid lines. The black rectangular border highlights the harmonic splitting.