http://www.iris.washington.edu/
The Incorporated Research Institutions for Seismology (IRIS) is a consortium of eighty universities in the United States which have research programs in seismology. IRIS is funded by the National Science Foundation and by the Air Force Office of Scientific Research. Users will find links to specific arms of the organization such as the Global Seismic Network or the Data Management Systems pages. One noteworthy area on this site is the Fast Archive Recovery Method or FARM system, which is a collection of files containing data about earthquakes of at least 5.5 magnitude. General seismological software, reports, and products are available for downloading as well.