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.


Recent Papers

118Accounting for uncertain 3-D elastic structure in fault slip estimates, T. Ragon and M. Simons, Geophys. J. Int. 224, 1404-1421,, 2021. [PDF]

117A Stochastic View of the 2020 Elaziğ Mw Earthquake (Turkey), T. Ragon et al., Geophys. Res. Lett. 48,, 2021. [PDF]

116A comparison of predicted and observed ocean tidal loading in Alaska, H. Martens and M. Simons, Geophys. J. Int. 223, 454-470,, 2020. [PDF]