deep-seated gravitational slope deformation, spatial distribution

Large-scale slow-moving deep-seated gravitational slope deformations (DSGSDs) are common but not highly investigated phenomena around the world. There is an evidence that most of the biggest terrestrial catastrophic rock slope failures (collapses) appeared in areas which are affected by DSGSDs. Case studies of ongoing and collapsed DSGSDs as well as associated deep-seated landslides presented in scientific papers are numerous, describing large variability of DSGSD types and behaviors. Taking into account different goals of investigations in published papers, different field conditions, ongoing technological development of remote sensing and geologic tools and no standardized approach regarding the terminology, we are facing many problems related with understanding of these complex mass movements. Still it is relevant to better understand the spatial distribution of deep-seated deformations and their collapses worldwide.