A Caltech Library Service

The Southern California Earthquake Data Center (SCEDC)

Hafner, Katrin and Clayton, Robert W. (2001) The Southern California Earthquake Data Center (SCEDC). Seismological Research Letters, 72 (6). pp. 705-711. ISSN 0895-0695. doi:10.1785/gssrl.72.6.705.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The SCEDC is the primary archive facility for seismic information for southern California earthquakes. The data archive consists of earthquake parameters and travel-time picks from 1932 to the present, waveform recordings from 1981 to the present recorded by the Southern California Seismic Network (SCSN) and Caltech-USGS TriNet, SAR satellite images of southern California, and some regional refraction profiles of the crust and mantle. Data from portable instrument deployments after the 1992 Joshua Tree and Landers earthquakes, and from the 1994 Northridge earthquake, are also stored in this facility. The Data Center is currently archiving nearly 3,000 data channels from 375 stations. An average of 20,000 earthquakes are processed and archived each year. The history of the SCEDC, the current state of data collection, the design of the database and archival system, user access to the system, and the plans for the future are outlined in this article. In particular, we discuss how the data from a large seismic array are stored, and we explain modern methods for accessing the data.

Item Type:Article
Related URLs:
URLURL TypeDescription​gssrl.72.6.705 DOIArticle
Clayton, Robert W.0000-0003-3323-3508
Additional Information:© 2001 by the Seismological Society of America. The SCEDC has received the bulk of its funding through the Southern California Earthquake Center (NSF EAR-8920136, USGS 14-08-0001-A0899, and 1434-HQ-97AGO1718). In addition, direct funding (matched by funds from SCEC) for the current mass-storage system was provided by NSF (EAR 9816156). TriNet has also provided significant infrastructure support through support of database experts and computer hardware. Contribution number 300 from SCEC and 8818 from the Seismological Laboratory at Caltech.
Group:Seismological Laboratory
Funding AgencyGrant Number
Southern California Earthquake Center (SCEC)UNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Southern California Earthquake Center (SCEC)300
Caltech Seismological Laboratory8818
Issue or Number:6
Record Number:CaltechAUTHORS:20121003-095023832
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34655
Deposited By: Tony Diaz
Deposited On:03 Oct 2012 18:20
Last Modified:09 Nov 2021 23:09

Repository Staff Only: item control page