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The Southern California Earthquake Data Center (SCEDC) operates at the Seismological Laboratory at Caltech and is the primary archive of seismological data for southern California. The 1932-to-present Caltech/USGS catalog maintained by the SCEDC is the most complete archive of seismic data for any region in the United States. Our mission is to maintain an easily accessible, well-organized, high-quality, searchable archive for research in seismology and earthquake engineering.
This web site is provided by the United States Geological Survey’s (USGS) Earthquake Hazards Program as part of our effort to reduce earthquake hazard in the United States. We are part of the USGS Hazards Mission Area and are the USGS component of the congressionally established, multi-agency National Earthquake Hazards Reduction Program (NEHRP).
The MARGINS Data Portal was established in fall 2003 in response to a program call for a dedicated data system to facilitate open and timely exchange of data in support of the interdisciplinary science goals of the program. The Data Portal has been built with the primary goal of providing full cataloging, open access, and long-term preservation of data collected during MARGINS/GeoPRISMS programs. The backbone of the system is an expedition metadata catalog, which provides information on field programs (who, what, when and where), inventories of sensor data and samples, relevant metadata and the links to associated data files which reside either within the Data Portal or at distributed repositories. The system is designed to leverage all relevant existing data resources and provides a framework for a broader distributed data system.