Matthew Herman

Research Interests

Numerical Modeling of the Lithosphere

The Earth is a complicated place, with mechanical and rheological heterogeneity that is often ignored in favor of a conceptually or computationally simpler model. I use a variety of numerical modeling approaches developed at Penn State and Utrecht University to understand the nature of geologically complex processes and the range of observations they constrain.

Stress Changes and Earthquake Triggering

Earthquakes (and other events such as wastewater or CO2 injection) change the forces acting on nearby faults. I am interested in how these events promote or inhibit seismic activity on these nearby structures, and whether such analysis can be used to anticipate seismic hazards.

Geodesy and the Earthquake Cycle

With improvements in the precision, accuracy, and sampling rate of both seismometers and geodetic tools, both sets of observations are increasingly necessary for a complete description of deformation throughout the earthquake cycle. I am interested in where these observation tools overlap, where they are complementary, and what these different techniques can tell us about earthquake processes.

Regional Seismic Source Characterization

Earthquakes are commonly analyzed using observations from 3,000-10,000 km away ("teleseismic" distances), which works great for events magnitude 5.5 and larger. But what about those finicky smaller earthquakes? I have worked with colleagues at the USGS and Saint Louis University using regional (less than 1000 km away) observations to constrain earthquake source parameters for much smaller events. These little earthquakes can reveal a lot about deformation processes.