Several decades of space geodetic monitoring has brought a wealth of data documenting the cycle of strain accumulation and release around plate boundaries. The short-term tectonic deformation is well understood in terms of the activation of fault slip, viscoelastic flow in the lower crust and mantle and the diffusion of pore fluids. In this hands-on workshop, we will describe how to build physical models of plate boundaries strain evolution. We will describe from the ground up how to simulate postseismic deformation data, in particular, GPS and InSAR data. We will describe several cases of interest including the 2012 Mw 8.6 Indian Ocean earthquake, the 2015 Mw 7.8 Gorkha, Nepal earthquake and the 2009 Mw 7.8 Dusky Sound, New Zealand earthquake. We will first recall the main rheological assumptions: How does friction govern fault slip? How do creep mechanisms control viscoelastic flow? We will show how to simulate geodetic time series based on physical assumptions about stress release mechanisms. Finally, we will describe how to create numerical simulations of earthquake cycles. We will describe the basic characteristics of fault friction that allow earthquake ruptures to occur spontaneously. The workshop will be designed for geologists, and geodesists interested in earthquake mechanics who have limited experience in physics and programming. The simulations will be carried out in Matlab using the Unicycle software.
Organizers and facilitators for the Workshop:
- Sylvain BARBOT - Assistant Professor, Asian School of the Environment, Nanyang Technological University
- James Daniel Paul MOORE - Research Fellow, Earth Observatory of Singapore, Nanyang Technological University.
- Sagar MASUTI - PhD Student, Earth Observatory of Singapore, Nanyang Technological University
- Dongju PENG - Research Fellow, Nanyang Technological University
Click here to register for the workshop.
Additional Materials: Online Tutorial