SOD is a program that automates tedious data selection, downloading, and routine processing tasks in seismology. It allows you to define your desired data based on earthquakes, recording stations, and the resulting combination of information. SOD then retrieves the data that matches the criteria and applies any number of processing steps using processors included in SOD and ones you've written yourself. All of this works for historical data, but as the name says, you can specify a "standing order" with SOD. If your criteria stretch off into the future, SOD will run until that day gathering seismograms for earthquakes as they occur.

The software that is made available on this page has been developed by many authors. The most important contributions came from (in alphabetical order): Jean Charlety, Shu-Huei Hung, Raffaella Montelli, Guust Nolet, Karin Sigloch, Yue Tian and Jean Virieux.

We are still in the process of writing more extensive manuals, for now you'll have to make do with what is offered. At times you may have to consult the program itself (e.g. for output formats).

For an extensive background see Nolet, G., A Breviary for Seismic Tomography, Cambridge Univ. Press (2008). Click here for a running list of errata. You can also download the Solutions to the Excercises, courtesy of Yue Tian.

GeoFEST (Geophysical Finite Element Simulation Tool) is a two- and three-dimensional finite element software package for the modeling of solid stress and strain in geophysical and other continuum domain applications. GeoFEST uses stress-displacement finite elements to model stress and strain due to elastic static response to an earthquake event in the region of the slipping fault, the time-dependent viscoelastic relaxation, and the net effects from a series of earthquakes.

The program source is written in C, and is targeted to be compiled and run on UNIX systems, and on diverse UNIX derivatives including LINUX, HPUX, and SunOS.

GRTo is a set of tools for the analysis of Gutenberg-Richter distributions of earthquake magnitudes. GRTo offers functions for the comparison of Gutenberg-Richter b-values. Several functions in GRTo are helpful for the assessment of the quality of seismicity catalogs.