COMPUTER PROGRAMS IN SEISMOLOGY

Introduction

With the installation of a PDP 11/70 minicomputer in 1979 for use in seismic network analysis, a persistent effort was made to use this tool for research. Because of an obligation felt for use of the PDP 11/70 as well as a desire to do something for the world wide seismological community, a set of computer programs emerged. The programs developed actually reflect research interests of the department as well as a desire to look at data in the manner of other investigators. In doing so, the hope is that these tools will permit research to progress rapidly.

This led to the development of COMPUTER PROGRAMS IN SEISMOLOGY which have been distributed to over 60 sites worldwide. The package contains its own graphics package, and is relatively easy to install.

Computer Programs in Seismology

These programs focus on the understanding and interpretation of seismic wave propagation in the crust and upper mantle of the Earth. Synthetic seismograph code is provided for sources and receivers at arbitrary positions in the plane layered media. Programs are provided for determination of crustal structure through the inversion of surface-wave dispersion and teleseismic P-wave receiver functions. Inversion of broadband recordings of regional earthquakes for source depth, focal mechanism and seismic moment is also provided. Finally, a new tool, gsac, is provided to permit interactive and script based manipulation of seismic traces. The entire package is well integrated in that the same Earth velocity model, waveform and graphics formats are used by all programs. A complete interactive graphics package is al sp provided.

Since this package of programs continues to develop and be refined  to keep current with increasing volumes of digital seismic data,  tracking updates  is important.  You might wish to  return to this page every few months.

If you have any questions or if you have suggestions for additions to the package, please Email rbh@eas.slu.edu.

PC Versions Currently support for PC's running windows requires the CYGWIN environment (http://www.cygwin.com). The source codes and installation procedure are the same as for the UNIX/LINUX/OSX versions.

UNIX/LINUX/OSX Versions Source codes and install scripts are available. C and FORTRAN compilers are required - gcc and g77 are available for free. Programs are distributed as gzip'd tar files (.tgz). Documentation in PostScript is provided.

GRADUATE STUDIES

The geophysics faculty, B. J. Mitchell, L. Zhu, K. Koper, D. Crossley and R. Herrmann have expertise in using modern digital seismic data, mathematics and programming to address problems in seismic hazard, seismic network operation, earth structure and tectonics.

We seek qualified students for our M.S. and Ph. D. programs. If you ae interested or if you can recommend a student, please follow the following link to our graduate program.

Link to Student Information

Link to Geoscience Graduate Program

The first step for applicants outside the US is to go to the Graduate School page and complete the Preliminary Examination. This is an unofficial application that is FREE of cost, and permits us to evaluate the applicant. If the faculty decide that we like the applicant, then the official application is required. The graduate school requires the GRE (Graduate Record Examination), TOEFL (Test of English as a Foreign Language), 3 letters of recommendation, offical record of academic progress and some personal information.

We hope that you will consider participating in our program.