Fig. 2: Cumulative number of geomorphic events as a function of time.
From: Rock slope failure preparation paced by total crack boundary length

a Cumulative number of geomorphic events as a function of time from 2012.12.13 to 2013.01.10, retrieved from the seismic records of STA4, STA5 and STA6 using hidden Markov model event detection. The green square highlights the cracks in the 27 h prior to the rockslide shown in (b). The black dashed line corresponds to the timing of the rockslide. b Zoom on the cumulative number of cracks displayed in the green square in (a); normalised crack cumulative number per hour for the 27 h prior to the rockslide (green line), and corresponding best fit using equation 1 (black line, \(\tau =0.1\), \({A}_{{tot}}=0.97\), \(b=4.3\), \({R}^{2}=\) 0.998).