The Southern California Earthquake Data Center (SCEDC) is the archive of the Caltech/USGS Southern California Seismic Network (SCSN). It is funded by the U.S. Geological Survey (USGS) and the Southern California Earthquake Center (SCEC). Its primary mission is to distribute data recorded or processed by the SCSN, a component of the California Integrated Seismic Network (CISN).

The SCSN and SCEDC teams are both based in Pasadena, California, and they work together to provide world class earthquake monitoring and earthquake data to the public and research communities. This SCSN website focuses on public earthquake information, such as real-time views of waveforms, maps of current earthquakes, in depth articles covering earthquakes of public interest, as well as background information on earthquake science and the history of the seismic network. The SCEDC website is more tailored towards the research community.

The SCEDC operates at the Seismological Laboratory at Caltech and is the primary archive of seismological data for southern California. Its holdings include an earthquake catalog (1932-present) and a waveform archive (1977-present). It is considered one of the most complete and integrated archives of seismic data for any region in the United States. The mission is to maintain an easily accessible, well-organized, high-quality, searchable archive for research in seismology and earthquake engineering. Explore the SCEDC website to access: