This seismological network includes several independent sites of gravitational instabilities in France.These sites corresponds to temporary acquisitions, funded by several independent projects, in relation with the French Landslide Observatory – OMIV. OMIV – Observatoire Multi-disciplinaire des Instabilités de Versants) is a service (SNO – Service National d'Observation) of the French Institute for Earth Sciences and Astronomy (INSU) of the National Center for Scientific Research (CNRS). The sites being studied are large and continuously active landslides, rocky cliffs affected by recurrent rockfalls, or rock glaciers. The sites are located in moutain or coastal environments. The data collected are devoted to the seismological analysis of gravitational instabilities i.e. landslide endogenous seismicity (e.g. seismic sources related to physical processes triggered by the deformation of unstable slopes) and to the production of landslide seismic sources catalogues. "