IRIS provides management of, and access to, observed
and derived data for the global earth science community.
This includes ground motion, atmospheric, infrasonic,
hydrological, and hydroacoustic data.
Our mission is to advance awareness and understanding of seismology
and earth science while inspiring careers in geophysics.
IRIS staff and subawardees oversee the construction,
operation, and maintenance of seismic networks
and related data facilities utilized
by a wide sector of the earth science community.
IRIS consists of three directorates:
Instrumentation Services (IS),
Data Services (DS), and
Education & Public Outreach (EPO).
Each directorate consists of various programs listed to the right.
IRIS has multiple online tools that allow you
to learn about global and regional seismicity.
IRIS is a consortium of over 120 US universities dedicated
to the operation of science facilities for the acquisition,
management, and distribution of seismological data.
IRIS is a 501 (c) (3) nonprofit organization incorporated
in the state of Delaware with its primary headquarters office
located in Washington, DC. IRIS is governed according to By-laws.
IRIS offers a variety of resources for the
seismological community and general public
including online interactive materials,
regular newsletters, brochures,
webinars, past event materials. We also offer
digital copies of our proposals and reviews
The Seismic Analysis Code software is available to IRIS Members and Affiliates.
As of October 2006, IRIS may also distribute the SAC software to collaborators such as the
U.S. Geological Survey, Air Force Technical Applications Center, members of the
International Federation of Digital Seismograph Networks and other non-U.S. seismological
institutes who are involved in relevant research projects with IRIS.
However, IRIS may not distribute the SAC software to any country on the
embargoed list of the U.S. Department of Commerce.
Due to these export restrictions, SAC software requests must be reviewed by IRIS staff.
This process may take several days, and you may be contacted for details or clarification
of the information you provide.
If you have questions about the status of a request contact
The Seismic Analysis Code: A Primer and User’s Guide by George Helffrich, James Wookey and Ian
Bastow has just been published by Cambridge University Press.
View the publisher’s page »
Please fill in all the fields below.
Requests that are missing information will be rejected.
If your email address does not match your institution’s URL,
you must provide one of the following to verify your identity:
A link to a class or faculty web page at your institution that identifies you,
or a link to a published reference:
A description of your research and how it satisfies the requirements
IRIS adheres to the ISO 3166 standard for country names and codes.
Because of the nature of the SAC license, IRIS cannot distribute a
binary distribution for Cygwin. For a more detailed explanation, see
http://cygwin.com/licensing.html. IRIS used to provide a
separate source distribution for Cygwin, but recent releases (starting with v1.7)
can build on Cygwin with the same source distribution as the other platforms.
Cygwin users should request the source distribution and consult the file
sac-101.6/Readme.buildsac for Cygwin-related build instructions.