Southern California Earthquake Data Center

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SCEDC Software and Downloads



Seismogram Transfer Program Other Waveform Retrieval Tools SCSN Earthquake Catalogs
Alternate Catalogs Models  

Seismogram Transfer Program

Current
Release

Platform/
Method

WebSTP
WebSTP is a Java applet for retrieving and plotting waveforms.
Web
STP client
Command-line interface for downloading seismic waveforms.
1.6.2
[download]
Linux
Unix
Mac
Cygwin STP
Command-line interface that runs in the Windows Cygwin environment.
[download] Windows
Cygwin
AISTSTP
Command-line interface for retrieving real time GPS displacement waveforms.
[download] Linux Sun Solaris Mac
SAC2000 Module
Module for pulling STP data directly into SAC2000 memory. When you download the version for your OS, save the file as libstp.so, not as the original filename.

The Macintosh version is still undergoing testing and debugging.

Linux [download]
Solaris [download]
Mac beta [download]
Linux
Sun Solaris
Mac
STP Reference Manual - Version 1.01 (pdf)
46-page Seismogram Transfer Program (STP) Reference Manual - Version 1.01

[download] .pdf Document
STP Quick User Guide
Instructions for using web and stand-alone versions of STP.

Web
STP FAQ
Frequently-asked questions about STP.
Web

Other Waveform Retrieval Tools

Current Release

Platform/
Method

NetDC
NetDC is an IRIS system that allows you to request seismological information through email and FTP.
Web

Data Handling Interface
DHI is an IRIS client-server system for downloading waveforms from various data centers.

[download] ALL
Scanned Seismogram Search
Find and download images of scanned paper seismograms.
Web

SCSN Earthquake Catalogs

Current
Release

Platform/
Method

Searchable SCSN Catalog
Searchable catalog of Southern California earthquakes from 1932 to present.
Web
SCSN Moment Tensor Search
Searchable catalog of moment tensor solutions for events from 1999 to present.
Web
SCEDC Catalog Format ASCII Files
Pre-compiled ASCII files of hypocentral information for 1932 through present.
[download] ALL
SCSN Catalog Format ASCII Files
Pre-compiled ASCII files of hypocentral information for 1932 through present.
[download] ALL

Alternate Catalogs

Current
Release

Platform/
Method

2011 - Hauksson, Yang and Shearer: locations using double-difference
This is a relocated catalog from SCSN for 1981 to 2011. The location methods and formats are similar to what was applied by: Lin, G., P. M. Shearer, and E. Hauksson (2007)
[download catalog]
[download format]
ALL
2011 - Yang, Hauksson, and Shearer: focal mechanism catalog for southern California (1981-2010)
A refined earthquake focal mechanism catalog for southern Califiornia using the HASH method and locations derived from waveform cross-correlation.
WEB
2004 - Hauksson, Chi and Shearer: locations using double-difference
Relocated catalog from SCSN for 1984 to 2002 that combines both HypoDD and locations determined using 3D velocity models. The recommended use of this catalog is for analyzing spatial and temporal seismicity patterns.

The magnitudes available from the SCEDC may be more up to date. Any statistical research should be double checked by using magnitudes from the SCEDC.

Relocations done by Egill Hauksson, and released in February 2004 If you use these locations, please reference: Hauksson et al., 2003.

[download] ALL
2005 - Shearer, Hauksson and Lin: locations using waveform cross-correlation and cluster analysis
Event locations in southern California as computed by the source-specific station term, waveform cross-correlation and cluster analysis methods.

Please reference:

Shearer, P., E. Hauksson and G. Lin, Southern California hypocenter relocation with waveform cross-correlation, Part 2: Results using source-specific station terms and cluster analysis, Bull. Seismol. Soc. Am., 95, 904-915, doi:10.1785/0120040168, 2005.

[download] ALL
2003 - Hauksson: 3-D earthquake locations
Crustal structure and seismicity distribution adjacent to the Pacific and North America plate boundary in southern California. If you use this catalog, please use the following reference:
Hauksson,E., Crustal structure and seismicity distribution adjacent to the Pacific and North America plate boundary in southern California J. Geophys. Res., 105, 13,875-13,903, 2000

[download] ALL
2000 - Richards-Dinger and Shearer: locations using source-specific station terms
Locations obtained for 1975, 1976, and 1981-1998, using existing phase picks and the source-specific station term method and a uniform 1-D velocity model. The locations are also described in the paper "Earthquake locations in southern California obtained using source-specific station terms" (J. Geophys. Res., Vol. 105 No. B5, 2000)
[download] ALL
2005 - Hardebeck: focal mechanisms from P-wave polarity and S/P amplitude ratios
An earthquake focal mechanism catalog for southern California earthquakes 1984-2003, determined using a combination of catalog P-wave first motion polarities and S-wave/P-wave amplitude ratios.
For now, please reference:
Hardebeck, J. L. and P. M. Shearer, Using S/P Amplitude Ratios to Constrain the Focal Mechanisms of Small Earthquakes, Bull. Seismo. Soc. Am., 93, 2434-2444, 2003.

[download] ALL
2000 - Hauksson: 3-D earthquake focal mechanisms
This catalog contains fault plane solutions produced by FPFIT. For more information see
Reasenberg, P. A., and D. Oppenheimer, 1985, FPFIT, FPPLOT, and FPPAGE: Fortran computer programs for calculating and displaying earthquake fault-plane solutions, U.S. Geol. Surv. Open-File Rep. 85-739.

Please reference:

Hauksson,E., Crustal structure and seismicity distribution adjacent to the Pacific and North America plate boundary in southern California J. Geophys. Res., 105, 13,875-13,903, 2000.
[download] Web

Models

Current
Release

Platform/
Method

SCEC Community Velocity Model
The 3D Community Velocity Model provides a unified reference model for the several areas of research that depend of the subsurface velocity structure in their analysis.The velocity models are a Fortran code and associated files that are downloaded, compiled, and run locally. The user queries the models by creating an input file of latitude, longitude, and depth values, and the model returns Vp, Vs, and density at each of those points. Some web based interfaces to handle model queries have been developed and are available from the SCEC Community Modeling Environment. It is recommended to use version 4 over previous versions.
[download] Web



 

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