In my research I use satellite geodesy to study areas threatened by major earthquakes or volcanic activity. Geophysical processes taking place at several kilometers below the earth’s surface, such as earthquake fault slip or magma accumulation, result in deformation of the surface that can be measured using geodetic methods. I use results of such measurements, along with geophysical modeling, to find out what is going on at depth. I primarily use satellite radar interferometry (InSAR) to detect and map the ground deformation. With this technique I have studied a variety of geophysical phenomena related to the earthquake cycle, volcanic processes, landslides, as well as reservoir pressure changes.