Séminaire ISTerre

---

Mapping fault slip along the Chaman plate boundary from space

mardi 8 juin 2021 - 11h00

Manon Dalaison - Ecole Normale Supérieure Laboratoire de géologie
--- 
The Chaman fault system, a 700 km long transpressive fold and fault belt, marks the boundary between the Indian plate and Eurasia. The space and time partitioning of the ~3 cm/yr of relative motion across the whole fault system is currently unclear, with evidences of aseismic slip, large historical earthquakes albeit a generally low seismic activity in the region. We address the question of the distribution of deformation along and across this major plate boundary with InSAR time series covering the area from 2015-2020. After detailing our original method for InSAR time series analysis with a Kalman Filter, we first consider the Chaman fault itself and evaluate the seismic to aseismic slip contribution. We characterise various aseismic slip modes, including continuous creep, post seismic slip following Mw 5-5.6 earthquakes, and potential micro-slip events (Mw ~2.8). Second, we consider the different parallel strike-slip faults within the fault zone and assess the partitioning of slip between major structures, unravelling an unknown fault that accommodates most of today’s relative motion.

---

Equipe organisatrice : Cycle sismique et déformations transitoires

Séminaire uniquement en visio

Informations de visio :

Sujet : Zoom meeting invitation - Seminar Manon Dalaison
Heure : 8 juin 2021 11:00 AM Paris

Participer à la réunion Zoom
https://univ-grenoble-alpes-fr.zoom.us/j/99567367928?pwd=SEp6TlAzUjVVVWEzUUhzd1k1elZsZz09

ID de réunion : 995 6736 7928
Code secret : 929414