We study earthquake source physics. This complex problem combines a diversity of fields from materials science and fracture mechanics to elastic wave propagation and diffraction. We focus on analytical and numerical studies of basic phenomemology, and seek observational evidence for these processes in the seismograms of recent earthquakes.

Dynamic Rupture: An overview of the earthquake problem and the dynamic rupture process.

Diffraction: Why rupture growth, modeled dynamically, is an elastic wave diffraction problem.

Heterogeneities: A study of how strength heterogeneities along the fault influence rupture growth.

Supershear: Shear ruptures that propagate faster than the shear wave speed.

Radiation: A study of the ground shaking created by heterogeneities along the fault.