Our research group addresses natural hazards and disasters from a geologic perspective, with emphasis on earthquakes. Earthquakes are a major threat to public health globally and locally in California. We focus on defining the potential for large earthquakes, and working collaboratively on developing forecasts, hazard models and effective responses. Results of our work are applied for disaster preparedness planning, structural design, land-use planning, seismic risk assessment and public education about earthquake hazard. Our work has been funded by NSF, USGS, NASA/JPL and the Southern California Earthquake Center.