Research Interests

Processes that deform the solid earth including those associated with the seismic cycle, migration of magma and water in the subsurface, tides, and glacial rebound; Tectonics and the relationship between short and long time scale processes; Glaciology, particularly basal mechanics and ice rheology; Tools and applications using space geodesy, particularly GNSS, Interferometric SAR and gravity measurements.

I currently divide my time between Caltech and JPL where I serve as Chief Scientist. For more information, please see JPL's Office of the Chief Scientist.