Acceleration of Slow-moving Landslides by EarthquakEs and Precipitation (ASLEEP)


– Project title: Acceleration of Slow-moving Landslides by EarthquakEs and Precipitation (ASLEEP)
– Project leader(s): LACROIX Pascal
– Team(s) involved: Geophysics of seismic and landslide risks team - Tectonics, Reliefs & Basins team - Seismic cycle and transient deformations team
– Amount: 5000 euros

**Description of the project

"This project aims to study the mechanisms of gravity deformation under seismic and rainfall stress. The approach consists in the restitution by satellite imagery of time series of displacement field on slow accelerated ground movements during 2 earthquakes (Gorkha in Nepal, and Sarpol-Zahab in Iran). This work, initiated 2 years ago and funded in 2019 by CNES, involves a Lebanese PhD student and a trainee from M2. A field trip is planned to Nepal in autumn 2020 (P. Lacroix, J.L. Mugnier). This field trip will be an opportunity to re-measure the GPS network set up on 10 slow ground movements in 2019 (GPS processing F. Jouanne) and to sample, for some of them, the main escarpments or major collapsed blocks in order to date their initiation by exposure to cosmogenic nuclides (dating S. Zerathe). Thus this project aims at comparing the triggering of short and long term ground movements, one of the themes of the transversal axis "Risks and Hazards"."