Neotectonics

We have years of experience with various aspects of neotectonics (the study of active tectonics and faulting), including regional GPS surveys and data analysis, neotectonic field and GIS-based mapping, cosmogenic nuclide dating and Quaternary slip rate estimation, and more.

Stress Analysis

We have developed methods for quantifying stresses in the upper crust from tectonics and topography, and are investigating the same from seismicity (including induced seismicity) and borehole data.

Global CMT Viewer

This is cool, it's a web-based map of all of the beachballs from the Global CMT catalog. The GCMT Viewer is here! Please be patient while it loads, and be careful not to load too many groups of events at once!.

Fault Slip Histories

We have developed probabilistic methods for estimating fault slip rate histories given instantaneous slip rate information and sets of ages and (modern) offsets for geomorphic and geologic features. Our methods can incorporate arbitrary probability distributions for any of the parameters, and yield full probability distribution functions of slip and net slip at any point in the fault's history.

Active Fault Maps

We have contributed to and currently maintain two maps or databases (GIS files) of active faults in two mountain belts, HimaTibetMap in the Indo-Asian convergence zone (northern India, Nepal, China, Pakistan, Afghanistan, Bhutan and surrounding regions) and Active Tectonics of the Andes (ATA) in the northern Andes. These open-source fault maps are widely used by researchers and students, and hopefully will help us come to a more accurate realization of seismic hazard in these developing regions.

These fault maps are open-source and we invite contributions from the world at large. They can be downloaded from GitHub, which is also how contributions are most welcome (although honestly just send us anything, we'll be happy to consider it!).
HimaTibetMap
ATA

Seismic Probability Estimation

We have done some recent work estimating the likelihood of observing significant earthquakes on a specific class of faults (publication here). With data on fault geometry and slip rate, we can come up with a general idea about how often we should expect earthquakes on a given fault or set of faults. This is of course somewhat dependent on some common seismological assumptions, but nevertheless it's a worthwhile complement to traditional probabilistic seismic hazard methods.