International Federation of Digital Seismograph Networks

Legacy Data Center Profiles

European data center profiles are maintained by ORFEUS and do not appear on this page.

Southern California Seismic Network / Southern California Earthquake Data Center


Southern California Earthquake Data Center
California Institute of Technology
M/C 252-21
Pasadena, CA 91125-2100

United States of America


The Southern California Seismic Network (SCSN) is a cooperative project of Caltech and the US Geological Survey. The SCSN has benefited from numerous upgrade projects. TERRAscope, funded by the L. K. Whittier and ARCO Foundations, and NSF, provided the first 28 broadband and strong motion stations in the late 1980s and early 1990s. The TriNet project, 1997 to 2002, funded by FEMA, California OES, USGS, and other partners, increased the number of broadband and strong motion stations to 155 and significantly improved the data communications and processing infrastructure. The California Integrated Seismic Network (CISN) project of Caltech, CGS, USGS, and UC Berkeley (2001 to present) provides funds for continued operation of the SCSN, improved robustness, and migration of operations toward statewide processing.

The Southern California Earthquake Data Center (SCEDC), funded by the Southern California Earthquake Center (SCEC) and other sources, holds the complete data archives for SCSN/CISN from 1932 to present. The SCSN operates one IRIS/GSN station, PAS in Pasadena, California. If you use SCSN data, please include a citation to “Southern California Seismic Network operated by Caltech and USGS” in your work.

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Data Distribution

Some data also distributed through the IRIS DMC

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