My research focuses on the development and use of physics-based computational simulations to characterize and understand earthquakes, tsunamis, and volcanoes, and similar phenomena. My approach is to identify the fundamental mechanical processes governing a system of interest, develop numerical models incorporating these processes, validate them using geophysical observations, and then use the models to predict system behavior. Specific research areas include earthquake rupture dynamics and earthquake source processes, tsunami generation, volcano seismology and infrasound, ice stream stick-slip events and flexural-gravity waves in ice shelves, and numerical methods for wave propagation.