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Dynamic rupture modeling entails a physics-based characterization of the earthquake rupture process based on first-order principles. Using 2D and 3D numerical modeling codes (e.g. finite-difference, spectral element methods), parameterizing the bulk medium properties, the stresses acting on the fault, and the frictional breakdown process at the propagating fracture, we solve the equations of motion to compute how earthquake ruptures behave under various initial and boundary conditions. Most of these simulations are computationally very demanding and require large-scale computing facilities.
Multi-cycle earthquake rupture simulations allow insights into long-term earthquake recurrence characteristics and fault system interaction. With MCQsim, we developed a tool to create long seismic records along predefined faults and fault systems of arbitrary geometric complexity. These records are further used for statistical analysis to investigate the system’s behavior and its dependence on selected parameters.
How do earthquake-rupture dimensions grow with increasing magnitude? Understanding earthquake source-scaling behavior provides important input for reliable seismic hazard analysis, studies on earthquake mechanics and for simulating rupture dynamics.
We utilize existing earthquake location catalogs of well-located events to investigate the temporal variability of earthquake depth (mainly aftershocks that follow large earthquakes) and transient changes in the seismic-aseismic transition zone depth.