Fig. 6

Structural section A-A’ across the Aiguiles Rouges and Mont Blanc massifs (see location in Fig. 1) (modified from Leloup et al. 2005). Hypocentres of the two 1994 and 2005 earthquakes are projected into the section and into corresponding structures. F1 to F5 indicate the various potential fault zones tested in the text of Sect. 4.3. F1 is a theoretical focal mechanism giving the best fit to the seismic waveforms (see Table 3), F2 corresponds to the Remuaz fault and F3 to the fault activated by the 2005 Vallorcine earthquake