Towards a standard typology of endogenous landslide seismic sources

摘要: Abstract. The objective of this work is to propose a standard classification seismic signals generated by gravitational processes and detected at close distances (  km). We review the studies where seismic instruments have been installed on unstable slopes discuss choice seismic instruments network geometries. Seismic observations acquired 13 unstable are analyzed in order construct proposed typology. The selected affected various landslide types (slide, fall, topple and flow) triggered material (from unconsolidated soils to consolidated rocks). investigate high-frequency bands ( >1  Hz) where most energy recorded 1 km sensor source distances. Several signal properties (duration, spectral content and spectrogram shape) used describe sources. observe that similar gravitational generate similar signals different slopes. Three main classes can be differentiated mainly from length signals, the number peaks duration autocorrelation. the “slopequake” class, which corresponds sources potentially occurring within body; “rockfall” to signals rock block impacts; “granular flow” class, which wet or dry debris/rock flows. Subclasses further differentiate specific properties (frequency content, resonance, precursory signal). of each class subclass described several same class recorded presented. Their potential origins are discussed. typology aims serve as for comparisons of endogenous microseismicity landslides.