DLC Dislocation Programs

Bob Simpson - U.S. Geological Survey, Menlo Park, CA

This is a brief description of a number of interactive programs designed to (1) create dislocation models based on rectangular slip surfaces, (2) calculate the resulting elastic fields in a 3-dimensional halfspace, and (3) display the results. The calculations are based on subroutines described by Okada (1992).

These programs are in pretty standard Fortran77. They were written at the U.S. Geological Survey (Office of Earthquakes, Volcanoes, and Engineering, Branch of Earthquake Geology and Geophysics) by Bob Simpson.

Information is available on the following subjects:

• Program List

• Examples

• Dislocation Format Information

• Sign Conventions, Coordinate Systems, Units

• Regional Stress Fields

• Coulomb Failure Function

• References

• Disclaimer

Comments or Problems?

Suggestions for changes or additions would be appreciated. Please send them by e-mail to:

This document last changed on 29 December 1994.