California Institute of Technology
Seismological Laboratory Division of Geological and Planetary Sciences

People

Ollie Stephenson

Oliver Stephenson

Grad Student in Geophysics

MSc 2019, Geophysics, California Institute of Technology
BA 2015, Natural Sciences, University of Cambridge, UK
MSc 2015, Natural Sciences, University of Cambridge, UK

California Institute of Technology
Seismological Laboratory
1200 E. California Blvd., MS 252-21
So. Mudd Building, Rm 370
Pasadena, CA 91125

Phone: (626) 395-8906
Fax: (626) 564-0715
Email: olstephe@caltech.edu

Research

I work on understanding earthquakes from an observational and modeling perspective. With Prof. Mark Simons I use satellite based InSAR (Interferometric Synthetic Aperture Radar) data to measure interseismic strain accumulation. The goal is to extract a high resolution velocity map of the earth's surface which slowly deforms, at millimeters per year, in response to motion between the Earth's plates. With Profs Simons and Zachary Ross I’m also developing methods to use InSAR measurements combined with machine learning techniques to map damage in the aftermath of major natural disasters. 
 
Working with Prof. Nadia Lapusta I use dynamic simulations of earthquakes to understand how they grow and stop. I'm specifically interested in mechanisms that can allow the fault to become far weaker during earthquakes, potentially allowing earthquakes to grow much larger than expected.