In this video from PASC16, Iris van Zelst from the Institute of Geophysics at ETH Zürich describes her poster: Coupling Geodynamic Seismic Cycle and Dynamic Rupture Models.
“Diverse modelling techniques that span large spatial and temporal scales are required to study the seismicity in subduction zones. Our seismo-thermo-mechanical (STM) seismic cycle models solve million year scale subduction dynamics and multiple earthquake events self-consistently, but fail to resolve the finer seismic time scale at which dynamic rupture models excel. By using the self-consistent stresses and strengths of our STM model as input for dynamic rupture scenarios conducted with SeisSol, the otherwise hard-to-constrain assumptions on these fields are resolved and advantages of both methods are exploited. The results show that a dynamic rupture can be triggered spontaneously and that the propagating rupture is qualitatively comparable to its quasi-static equivalent. The importance of both self-consistent initial conditions and dynamic feedback on fault strength is illustrated by a quantitative comparison of surface displacements and stresses.”
Thanks to Rich Brueckner from insideHPC Media Publications for recording the video.
For the full list of the PASC16 video please visit the PASC16 Video Gallery.