Fig. 3From: A look at the blind Kumamoto experiment: combining active and passive seismic observations to avoid Rayleigh-wave mode misidentificationActive source data. a Stack of 8 sledgehammer shots in the forward direction (Table 2). b Stack of 9 sledgehammer shots in the reverse direction. Trace normalization is applied to enhance the surface wave arrivals at large offsets for visualization onlyBack to article page