Daniel Trugman

Postdoctoral Researcher
Scripps Institution of Oceanography

About Me


I am a (newly-minted) postdoctoral researcher in earthquake seismology, currently working at Scripps Institution of Oceanography's Institute of Geophysics and Planetary Physics in La Jolla, CA. In January 2018, I will transition to a postdoctoral research fellowship at Los Alamos National Laboratory, in New Mexico. This site will likely be moving to a new home at that time.

My Ph.D. research was advised by Peter Shearer, a guru of observational seismology and professor of Geophysics at Scripps. My dissertation focused on characterizing how earthquake source properties and occurrence patterns vary in space and evolve in time. These studies provide quantitative constraints on the true natural variability in earthquake occurrence that can be used to improve the next generation of seismic hazard assessments. A better understanding of this variability, including the deviant, outlier earthquakes with unusual source properties, also provide insight into the physics underlying earthquake nucleation, stress-driven triggering, and earthquake-earthquake interaction.


Research projects, past and present, include:

  • Using machine learning algorithms to quantify and understand the relationship between dynamic earthquake source properties and ground motion amplitudes for earthquakes in the San Francisco Bay Area (work in progress)
  • Improving methodology for making reliable source spectral estimates for large data sets, and applying these methods to study source properties of natural, triggered, and induced earthquakes (link)
  • Quantifying scaling relationships for the dynamic properties of the earthquake source, and understanding the implications of non-self-similar scaling for rupture processes and seismic hazard (link)
  • Improving numerical algorithms for large-scale earthquake relocations based on waveform cross-correlation of similar event clusters (link)
  • Studying long-term changes in the patterns of seismicity in California's geothermal fields (link)
  • Satellite geodetic measurements of subsidence at the Cerro Prieto Geothermal Field (Mexico), and its potential influence on seismic hazard (link)
  • Statistical tests to detect and measure clustering in earthquake catalogs (link)
  • Low Frequency Earthquake clustering and interaction at Parkfield, CA (link)
  • Numerical modeling of dynamically triggered tremor (link)
  • Statistics-driven source modeling of fully dynamic earthquake rupture simulations on fractally rough faults (link)


2017: Ph.D. Earth Sciences/Geophysics, University of California - San Diego
2015: M.S. Earth Sciences/Geophysics, University of California - San Diego
2013: B.S. Geophysics, Stanford University


dtrugman .at. ucsd .dot. edu
Office: Munk 202
Scripps Institution of Oceanography
9500 Gilman Drive MC 0225
La Jolla, CA, 92093-0225