  We developed a new strategy for Disaster Risk Reduction for gravitational
slope failure: We propose a simple method for real-time early warning of
gravity-driven failures that considers and exploits both the heterogeneity of
natural media and characteristics of acoustic emissions attenuation. This
method capitalizes on co-detection of elastic waves emanating from micro-cracks
by a network of multiple and spatially distributed sensors. Event co-detection
is considered as surrogate for large event size with more frequent co-detected
events marking imminence of catastrophic failure. In this study we apply this
method to a steep rock glacier / debris slope and demonstrate the potential of
this simple strategy for real world cases, i.e. at slope scale. This low cost,
robust and autonomous system provides a well adapted alternative/complementary
solution for Early Warning Systems.
