Figure 4

a) Panchromatic Quickbird image (0.6 m resolution) of the dam site before blast (in 2008) with location of the local ‘Southern Fault’ (yellow line), seismic stations S1-S7 which recorded the blast and the two galleries that had been filled with explosives; underground spillway in blue. b) Coloured Quickbird image (2.5 m resolution) of the dam site after complete shaping of the dam with location of explosion area (2011). c) Overlay of DEMs of the site: coarse 90 m SRTM DEM in the left part, 20 m SPOT DEM in the main part and local 2.5 m DEM constructed from total station measurements – see zoom with about 4500 topographic data points in dark blue in d), together with locations of electrical resistivity profiles (violet lines).