SAC - Seismic Analysis Code

SAC (Seismic Analysis Code) is a general purpose interactive program designed for the study of sequential signals, especially timeseries data. Emphasis has been placed on analysis tools used by research seismologists in the detailed study of seismic events. Analysis capabilities include general arithmetic operations, Fourier transforms, three spectral estimation techniques, IIR and FIR filtering, signal stacking, decimation, interpolation, correlation, and seismic phase picking. SAC also contains an extensive graphics capability.

SAC Software and How to Request a Copy

The Seismic Analysis Code software is available free to IRIS members. Information about the SAC Software, source code and SAC mailing list is on the SAC Software page.

To request a copy of the SAC Software for Mac (OSX/PPC or OSX/Intel), Sun Solaris, Linux or Cygwin, please fill out the SAC Software Request Form. Binaries and source release (version 101.2): September 2008.

SAC Mailing List

sac-help provides a forum for SAC users to exchange ideas and ask questions about SAC usage, installation, portability, etc. Click here for information on subscribing, unsubscribing, posting messages, etc.

Seismology Links

• Energy & Environment Directorate - Lawerence Livermore National Laboratory


• IRIS Data Management Center - seismic data and information


• Seismo-surfing the Internet - list of seismological and geophysical sites

If you have technical questions about the SAC software, please send email to the sac-help mailing list.       

September 2008