This $227,954 federal Project Grant award from the National Science Foundation's Geosciences Program (CFDA 47.050) supports a collaborative research project to estimate fault slip rates across the Japan fault system over the past 25 years. The researchers at Harvard University and Smith College will combine three-dimensional fault system models with statistical tracking techniques to provide a comprehensive model of how fault movements are interconnected over time and space, and how slip rates vary between large earthquakes. The resulting analysis and modeling codes will be made freely available to scientists studying complex fault systems worldwide. This research aims to improve understanding of earthquake cycle behaviors and inform earthquake hazard assessments in Japan. The project will also provide training opportunities for graduate and undergraduate students in earthquake science and technical computing.