Fig. 11
From: Earthquakes in Switzerland and surrounding regions during 2011
Seismograms of the first detected rock-fall from the west face of Les Drus near Chamonix, France, recorded at station EMV (Emosson), at a distance of 15 km. The signals are filtered with a 2nd order causal Butterworth band-pass filter between 1 and 20 Hz. Note the higher-frequency signal with impulsive P and S-arrivals embedded in the emergent and longer-lasting signal, typical for a landslide